Merge branch 'akpm' (patches from Andrew)

Merge yet more updates from Andrew Morton:

 - Oleg's "wait/ptrace: assume __WALL if the child is traced".  It's a
   kernel-based workaround for existing userspace issues.

 - A few hotfixes

 - befs cleanups

 - nilfs2 updates

 - sys_wait() changes

 - kexec updates

 - kdump

 - scripts/gdb updates

 - the last of the MM queue

 - a few other misc things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (84 commits)
  kgdb: depends on VT
  drm/amdgpu: make amdgpu_mn_get wait for mmap_sem killable
  drm/radeon: make radeon_mn_get wait for mmap_sem killable
  drm/i915: make i915_gem_mmap_ioctl wait for mmap_sem killable
  uprobes: wait for mmap_sem for write killable
  prctl: make PR_SET_THP_DISABLE wait for mmap_sem killable
  exec: make exec path waiting for mmap_sem killable
  aio: make aio_setup_ring killable
  coredump: make coredump_wait wait for mmap_sem for write killable
  vdso: make arch_setup_additional_pages wait for mmap_sem for write killable
  ipc, shm: make shmem attach/detach wait for mmap_sem killable
  mm, fork: make dup_mmap wait for mmap_sem for write killable
  mm, proc: make clear_refs killable
  mm: make vm_brk killable
  mm, elf: handle vm_brk error
  mm, aout: handle vm_brk failures
  mm: make vm_munmap killable
  mm: make vm_mmap killable
  mm: make mmap_sem for write waits killable for mm syscalls
  MAINTAINERS: add co-maintainer for scripts/gdb
  ...

Documentation/filesystems/nilfs2.txt

@@ -268,3 +268,8 @@ among NILFS2 files can be depicted as follows:
                                     ( regular file, directory, or symlink )
 
 For detail on the format of each file, please see include/linux/nilfs2_fs.h.
+
+There are no patents or other intellectual property that we protect
+with regard to the design of NILFS2.  It is allowed to replicate the
+design in hopes that other operating systems could share (mount, read,
+write, etc.) data stored in this format.

Documentation/gdb-kernel-debugging.txt

@@ -139,6 +139,27 @@ Examples of using the Linux-provided gdb helpers
       start_comm = "swapper/2\000\000\000\000\000\000"
     }
 
+ o Dig into a radix tree data structure, such as the IRQ descriptors:
+    (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18)
+    $6 = {
+      irq_common_data = {
+        state_use_accessors = 67584,
+        handler_data = 0x0 <__vectors_start>,
+        msi_desc = 0x0 <__vectors_start>,
+        affinity = {{
+            bits = {65535}
+          }}
+      },
+      irq_data = {
+        mask = 0,
+        irq = 18,
+        hwirq = 27,
+        common = 0xee803d80,
+        chip = 0xc0eb0854 <gic_data>,
+        domain = 0xee808000,
+        parent_data = 0x0 <__vectors_start>,
+        chip_data = 0xc0eb0854 <gic_data>
+      } <... trimmed ...>
 
 List of commands and functions
 ------------------------------

Documentation/kdump/gdbmacros.txt

@@ -15,15 +15,16 @@
 
 define bttnobp
 	set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)
-	set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)
+	set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)
 	set $init_t=&init_task
 	set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)
+	set var $stacksize = sizeof(union thread_union)
 	while ($next_t != $init_t)
 		set $next_t=(struct task_struct *)$next_t
 		printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm
 		printf "===================\n"
-		set var $stackp = $next_t.thread.esp
-		set var $stack_top = ($stackp & ~4095) + 4096
+		set var $stackp = $next_t.thread.sp
+		set var $stack_top = ($stackp & ~($stacksize - 1)) + $stacksize
 
 		while ($stackp < $stack_top)
 			if (*($stackp) > _stext && *($stackp) < _sinittext)
@@ -31,13 +32,13 @@ define bttnobp
 			end
 			set $stackp += 4
 		end
-		set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)
+		set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)
 		while ($next_th != $next_t)
 			set $next_th=(struct task_struct *)$next_th
 			printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm
 			printf "===================\n"
-			set var $stackp = $next_t.thread.esp
-			set var $stack_top = ($stackp & ~4095) + 4096
+			set var $stackp = $next_t.thread.sp
+			set var $stack_top = ($stackp & ~($stacksize - 1)) + stacksize
 
 			while ($stackp < $stack_top)
 				if (*($stackp) > _stext && *($stackp) < _sinittext)
@@ -45,7 +46,7 @@ define bttnobp
 				end
 				set $stackp += 4
 			end
-			set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)
+			set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)
 		end
 		set $next_t=(char *)($next_t->tasks.next) - $tasks_off
 	end
@@ -54,42 +55,44 @@ document bttnobp
 	dump all thread stack traces on a kernel compiled with !CONFIG_FRAME_POINTER
 end
 
+define btthreadstack
+	set var $pid_task = $arg0
+
+	printf "\npid %d; comm %s:\n", $pid_task.pid, $pid_task.comm
+	printf "task struct: "
+	print $pid_task
+	printf "===================\n"
+	set var $stackp = $pid_task.thread.sp
+	set var $stacksize = sizeof(union thread_union)
+	set var $stack_top = ($stackp & ~($stacksize - 1)) + $stacksize
+	set var $stack_bot = ($stackp & ~($stacksize - 1))
+
+	set $stackp = *((unsigned long *) $stackp)
+	while (($stackp < $stack_top) && ($stackp > $stack_bot))
+		set var $addr = *(((unsigned long *) $stackp) + 1)
+		info symbol $addr
+		set $stackp = *((unsigned long *) $stackp)
+	end
+end
+document btthreadstack
+	 dump a thread stack using the given task structure pointer
+end
+
+
 define btt
 	set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)
-	set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)
+	set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)
 	set $init_t=&init_task
 	set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)
 	while ($next_t != $init_t)
 		set $next_t=(struct task_struct *)$next_t
-		printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm
-		printf "===================\n"
-		set var $stackp = $next_t.thread.esp
-		set var $stack_top = ($stackp & ~4095) + 4096
-		set var $stack_bot = ($stackp & ~4095)
-
-		set $stackp = *($stackp)
-		while (($stackp < $stack_top) && ($stackp > $stack_bot))
-			set var $addr = *($stackp + 4)
-			info symbol $addr
-			set $stackp = *($stackp)
-		end
+		btthreadstack $next_t
 
-		set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)
+		set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)
 		while ($next_th != $next_t)
 			set $next_th=(struct task_struct *)$next_th
-			printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm
-			printf "===================\n"
-			set var $stackp = $next_t.thread.esp
-			set var $stack_top = ($stackp & ~4095) + 4096
-			set var $stack_bot = ($stackp & ~4095)
-
-			set $stackp = *($stackp)
-			while (($stackp < $stack_top) && ($stackp > $stack_bot))
-				set var $addr = *($stackp + 4)
-				info symbol $addr
-				set $stackp = *($stackp)
-			end
-			set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)
+			btthreadstack $next_th
+			set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)
 		end
 		set $next_t=(char *)($next_t->tasks.next) - $tasks_off
 	end
@@ -101,7 +104,7 @@ end
 define btpid
 	set var $pid = $arg0
 	set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)
-	set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)
+	set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)
 	set $init_t=&init_task
 	set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)
 	set var $pid_task = 0
@@ -113,29 +116,18 @@ define btpid
 			set $pid_task = $next_t
 		end
 
-		set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)
+		set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)
 		while ($next_th != $next_t)
 			set $next_th=(struct task_struct *)$next_th
 			if ($next_th.pid == $pid)
 				set $pid_task = $next_th
 			end
-			set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)
+			set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)
 		end
 		set $next_t=(char *)($next_t->tasks.next) - $tasks_off
 	end
 
-	printf "\npid %d; comm %s:\n", $pid_task.pid, $pid_task.comm
-	printf "===================\n"
-	set var $stackp = $pid_task.thread.esp
-	set var $stack_top = ($stackp & ~4095) + 4096
-	set var $stack_bot = ($stackp & ~4095)
-
-	set $stackp = *($stackp)
-	while (($stackp < $stack_top) && ($stackp > $stack_bot))
-		set var $addr = *($stackp + 4)
-		info symbol $addr
-		set $stackp = *($stackp)
-	end
+	btthreadstack $pid_task
 end
 document btpid
 	backtrace of pid
@@ -145,7 +137,7 @@ end
 define trapinfo
 	set var $pid = $arg0
 	set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)
-	set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)
+	set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)
 	set $init_t=&init_task
 	set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)
 	set var $pid_task = 0
@@ -157,13 +149,13 @@ define trapinfo
 			set $pid_task = $next_t
 		end
 
-		set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)
+		set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)
 		while ($next_th != $next_t)
 			set $next_th=(struct task_struct *)$next_th
 			if ($next_th.pid == $pid)
 				set $pid_task = $next_th
 			end
-			set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)
+			set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)
 		end
 		set $next_t=(char *)($next_t->tasks.next) - $tasks_off
 	end

Kbuild

@@ -5,6 +5,7 @@
 # 2) Generate timeconst.h
 # 3) Generate asm-offsets.h (may need bounds.h and timeconst.h)
 # 4) Check for missing system calls
+# 5) Generate constants.py (may need bounds.h)
 
 # Default sed regexp - multiline due to syntax constraints
 define sed-y
@@ -96,5 +97,14 @@ quiet_cmd_syscalls = CALL    $<
 missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE
 	$(call cmd,syscalls)
 
+#####
+# 5) Generate constants for Python GDB integration
+#
+
+extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py
+
+build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file)
+	@$(MAKE) $(build)=scripts/gdb/linux $@
+
 # Keep these three files during make clean
 no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)

MAINTAINERS

@@ -4993,6 +4993,7 @@ F:	drivers/scsi/gdt*
 
 GDB KERNEL DEBUGGING HELPER SCRIPTS
 M:	Jan Kiszka <jan.kiszka@siemens.com>
+M:	Kieran Bingham <kieran@bingham.xyz>
 S:	Supported
 F:	scripts/gdb/
 
@@ -8038,6 +8039,7 @@ NILFS2 FILESYSTEM
 M:	Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
 L:	linux-nilfs@vger.kernel.org
 W:	http://nilfs.sourceforge.net/
+W:	http://nilfs.osdn.jp/
 T:	git git://github.com/konis/nilfs2.git
 S:	Supported
 F:	Documentation/filesystems/nilfs2.txt

arch/arm/configs/bcm_defconfig

@@ -12,7 +12,6 @@ CONFIG_CGROUPS=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_BLK_CGROUP=y
 CONFIG_NAMESPACES=y

arch/arm/configs/zx_defconfig

@@ -7,7 +7,6 @@ CONFIG_CGROUPS=y
 CONFIG_CGROUP_DEBUG=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_RT_GROUP_SCHED=y
 CONFIG_NAMESPACES=y

arch/arm/kernel/process.c

@@ -420,7 +420,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	npages = 1; /* for sigpage */
 	npages += vdso_total_pages;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 	hint = sigpage_addr(mm, npages);
 	addr = get_unmapped_area(NULL, hint, npages << PAGE_SHIFT, 0, 0);
 	if (IS_ERR_VALUE(addr)) {

arch/arm64/kernel/vdso.c

@@ -95,7 +95,8 @@ int aarch32_setup_vectors_page(struct linux_binprm *bprm, int uses_interp)
 	};
 	void *ret;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 	current->mm->context.vdso = (void *)addr;
 
 	/* Map vectors page at the high address. */
@@ -163,7 +164,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm,
 	/* Be sure to map the data page */
 	vdso_mapping_len = vdso_text_len + PAGE_SIZE;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 	vdso_base = get_unmapped_area(NULL, 0, vdso_mapping_len, 0, 0);
 	if (IS_ERR_VALUE(vdso_base)) {
 		ret = ERR_PTR(vdso_base);

arch/hexagon/kernel/vdso.c

@@ -65,7 +65,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	unsigned long vdso_base;
 	struct mm_struct *mm = current->mm;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 
 	/* Try to get it loaded right near ld.so/glibc. */
 	vdso_base = STACK_TOP;

arch/m32r/kernel/smp.c

@@ -164,6 +164,7 @@ void smp_flush_cache_all(void)
 	spin_unlock(&flushcache_lock);
 	preempt_enable();
 }
+EXPORT_SYMBOL(smp_flush_cache_all);
 
 void smp_flush_cache_all_interrupt(void)
 {

arch/mips/Kconfig

@@ -3117,6 +3117,7 @@ config MIPS32_N32
 config BINFMT_ELF32
 	bool
 	default y if MIPS32_O32 || MIPS32_N32
+	select ELFCORE
 
 endmenu
 

arch/mips/configs/db1xxx_defconfig

@@ -18,7 +18,6 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_MEMCG=y
 CONFIG_MEMCG_SWAP=y
 CONFIG_MEMCG_KMEM=y

arch/mips/configs/loongson3_defconfig

@@ -25,7 +25,6 @@ CONFIG_TASK_XACCT=y
 CONFIG_TASK_IO_ACCOUNTING=y
 CONFIG_LOG_BUF_SHIFT=14
 CONFIG_CPUSETS=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_MEMCG=y
 CONFIG_MEMCG_SWAP=y
 CONFIG_BLK_CGROUP=y

arch/mips/kernel/vdso.c

@@ -104,7 +104,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	struct resource gic_res;
 	int ret;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 
 	/*
 	 * Determine total area size. This includes the VDSO data itself, the

arch/mn10300/configs/asb2364_defconfig

@@ -11,7 +11,6 @@ CONFIG_CGROUPS=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_RELAY=y
 # CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
 CONFIG_EXPERT=y

arch/powerpc/kernel/vdso.c

@@ -195,7 +195,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	 * and end up putting it elsewhere.
 	 * Add enough to the size so that the result can be aligned.
 	 */
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 	vdso_base = get_unmapped_area(NULL, vdso_base,
 				      (vdso_pages << PAGE_SHIFT) +
 				      ((VDSO_ALIGNMENT - 1) & PAGE_MASK),

arch/s390/kernel/machine_kexec.c

@@ -43,13 +43,13 @@ static int machine_kdump_pm_cb(struct notifier_block *nb, unsigned long action,
 	switch (action) {
 	case PM_SUSPEND_PREPARE:
 	case PM_HIBERNATION_PREPARE:
-		if (crashk_res.start)
-			crash_map_reserved_pages();
+		if (kexec_crash_image)
+			arch_kexec_unprotect_crashkres();
 		break;
 	case PM_POST_SUSPEND:
 	case PM_POST_HIBERNATION:
-		if (crashk_res.start)
-			crash_unmap_reserved_pages();
+		if (kexec_crash_image)
+			arch_kexec_protect_crashkres();
 		break;
 	default:
 		return NOTIFY_DONE;
@@ -60,6 +60,8 @@ static int machine_kdump_pm_cb(struct notifier_block *nb, unsigned long action,
 static int __init machine_kdump_pm_init(void)
 {
 	pm_notifier(machine_kdump_pm_cb, 0);
+	/* Create initial mapping for crashkernel memory */
+	arch_kexec_unprotect_crashkres();
 	return 0;
 }
 arch_initcall(machine_kdump_pm_init);
@@ -146,6 +148,8 @@ static int kdump_csum_valid(struct kimage *image)
 #endif
 }
 
+#ifdef CONFIG_CRASH_DUMP
+
 /*
  * Map or unmap crashkernel memory
  */
@@ -167,21 +171,25 @@ static void crash_map_pages(int enable)
 }
 
 /*
- * Map crashkernel memory
+ * Unmap crashkernel memory
  */
-void crash_map_reserved_pages(void)
+void arch_kexec_protect_crashkres(void)
 {
-	crash_map_pages(1);
+	if (crashk_res.end)
+		crash_map_pages(0);
 }
 
 /*
- * Unmap crashkernel memory
+ * Map crashkernel memory
  */
-void crash_unmap_reserved_pages(void)
+void arch_kexec_unprotect_crashkres(void)
 {
-	crash_map_pages(0);
+	if (crashk_res.end)
+		crash_map_pages(1);
 }
 
+#endif
+
 /*
  * Give back memory to hypervisor before new kdump is loaded
  */

arch/s390/kernel/vdso.c

@@ -216,7 +216,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	 * it at vdso_base which is the "natural" base for it, but we might
 	 * fail and end up putting it elsewhere.
 	 */
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 	vdso_base = get_unmapped_area(NULL, 0, vdso_pages << PAGE_SHIFT, 0, 0);
 	if (IS_ERR_VALUE(vdso_base)) {
 		rc = vdso_base;

arch/sh/configs/apsh4ad0a_defconfig

@@ -10,7 +10,6 @@ CONFIG_CGROUPS=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_MEMCG=y
 CONFIG_BLK_CGROUP=y
 CONFIG_NAMESPACES=y

arch/sh/configs/sdk7786_defconfig

@@ -17,7 +17,6 @@ CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 # CONFIG_PROC_PID_CPUSET is not set
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_MEMCG=y
 CONFIG_CGROUP_MEMCG_SWAP=y
 CONFIG_CGROUP_SCHED=y

arch/sh/configs/se7206_defconfig

@@ -10,7 +10,6 @@ CONFIG_CGROUPS=y
 CONFIG_CGROUP_DEBUG=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_MEMCG=y
 CONFIG_RELAY=y
 CONFIG_NAMESPACES=y

arch/sh/configs/shx3_defconfig

@@ -12,7 +12,6 @@ CONFIG_CGROUPS=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_MEMCG=y
 CONFIG_RELAY=y
 CONFIG_NAMESPACES=y

arch/sh/configs/urquell_defconfig

@@ -14,7 +14,6 @@ CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 # CONFIG_PROC_PID_CPUSET is not set
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_MEMCG=y
 CONFIG_CGROUP_MEMCG_SWAP=y
 CONFIG_CGROUP_SCHED=y

arch/sh/kernel/vsyscall/vsyscall.c

@@ -64,7 +64,9 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	unsigned long addr;
 	int ret;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
+
 	addr = get_unmapped_area(NULL, 0, PAGE_SIZE, 0, 0);
 	if (IS_ERR_VALUE(addr)) {
 		ret = addr;

arch/tile/configs/tilegx_defconfig

@@ -16,7 +16,6 @@ CONFIG_CGROUP_DEBUG=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_RT_GROUP_SCHED=y
 CONFIG_BLK_CGROUP=y

arch/tile/configs/tilepro_defconfig

@@ -15,7 +15,6 @@ CONFIG_CGROUP_DEBUG=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_RT_GROUP_SCHED=y
 CONFIG_BLK_CGROUP=y

arch/um/configs/i386_defconfig

@@ -17,7 +17,6 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_BLK_CGROUP=y
 # CONFIG_PID_NS is not set

arch/um/configs/x86_64_defconfig

@@ -15,7 +15,6 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_BLK_CGROUP=y
 # CONFIG_PID_NS is not set

arch/x86/configs/i386_defconfig

@@ -17,7 +17,6 @@ CONFIG_CGROUPS=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_COMPAT_BRK is not set

arch/x86/configs/x86_64_defconfig

@@ -16,7 +16,6 @@ CONFIG_CGROUPS=y
 CONFIG_CGROUP_FREEZER=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_CGROUP_SCHED=y
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_COMPAT_BRK is not set

arch/x86/entry/vdso/vma.c

@@ -163,7 +163,8 @@ static int map_vdso(const struct vdso_image *image, bool calculate_addr)
 		addr = 0;
 	}
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 
 	addr = get_unmapped_area(NULL, addr,
 				 image->size - image->sym_vvar_start, 0, 0);

arch/x86/ia32/ia32_aout.c

@@ -116,13 +116,13 @@ static struct linux_binfmt aout_format = {
 	.min_coredump	= PAGE_SIZE
 };
 
-static void set_brk(unsigned long start, unsigned long end)
+static unsigned long set_brk(unsigned long start, unsigned long end)
 {
 	start = PAGE_ALIGN(start);
 	end = PAGE_ALIGN(end);
 	if (end <= start)
-		return;
-	vm_brk(start, end - start);
+		return start;
+	return vm_brk(start, end - start);
 }
 
 #ifdef CONFIG_COREDUMP
@@ -349,7 +349,10 @@ static int load_aout_binary(struct linux_binprm *bprm)
 #endif
 
 		if (!bprm->file->f_op->mmap || (fd_offset & ~PAGE_MASK) != 0) {
-			vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+			error = vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+			if (IS_ERR_VALUE(error))
+				return error;
+
 			read_code(bprm->file, N_TXTADDR(ex), fd_offset,
 					ex.a_text+ex.a_data);
 			goto beyond_if;
@@ -372,10 +375,13 @@ static int load_aout_binary(struct linux_binprm *bprm)
 		if (error != N_DATADDR(ex))
 			return error;
 	}
+
 beyond_if:
-	set_binfmt(&aout_format);
+	error = set_brk(current->mm->start_brk, current->mm->brk);
+	if (IS_ERR_VALUE(error))
+		return error;
 
-	set_brk(current->mm->start_brk, current->mm->brk);
+	set_binfmt(&aout_format);
 
 	current->mm->start_stack =
 		(unsigned long)create_aout_tables((char __user *)bprm->p, bprm);
@@ -434,7 +440,9 @@ static int load_aout_library(struct file *file)
 			error_time = jiffies;
 		}
 #endif
-		vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
+		retval = vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
+		if (IS_ERR_VALUE(retval))
+			goto out;
 
 		read_code(file, start_addr, N_TXTOFF(ex),
 			  ex.a_text + ex.a_data);

arch/x86/kernel/machine_kexec_64.c

@@ -538,3 +538,48 @@ overflow:
 	return -ENOEXEC;
 }
 #endif /* CONFIG_KEXEC_FILE */
+
+static int
+kexec_mark_range(unsigned long start, unsigned long end, bool protect)
+{
+	struct page *page;
+	unsigned int nr_pages;
+
+	/*
+	 * For physical range: [start, end]. We must skip the unassigned
+	 * crashk resource with zero-valued "end" member.
+	 */
+	if (!end || start > end)
+		return 0;
+
+	page = pfn_to_page(start >> PAGE_SHIFT);
+	nr_pages = (end >> PAGE_SHIFT) - (start >> PAGE_SHIFT) + 1;
+	if (protect)
+		return set_pages_ro(page, nr_pages);
+	else
+		return set_pages_rw(page, nr_pages);
+}
+
+static void kexec_mark_crashkres(bool protect)
+{
+	unsigned long control;
+
+	kexec_mark_range(crashk_low_res.start, crashk_low_res.end, protect);
+
+	/* Don't touch the control code page used in crash_kexec().*/
+	control = PFN_PHYS(page_to_pfn(kexec_crash_image->control_code_page));
+	/* Control code page is located in the 2nd page. */
+	kexec_mark_range(crashk_res.start, control + PAGE_SIZE - 1, protect);
+	control += KEXEC_CONTROL_PAGE_SIZE;
+	kexec_mark_range(control, crashk_res.end, protect);
+}
+
+void arch_kexec_protect_crashkres(void)
+{
+	kexec_mark_crashkres(true);
+}
+
+void arch_kexec_unprotect_crashkres(void)
+{
+	kexec_mark_crashkres(false);
+}

arch/x86/um/vdso/vma.c

@@ -61,7 +61,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
 	if (!vdso_enabled)
 		return 0;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 
 	err = install_special_mapping(mm, um_vdso_addr, PAGE_SIZE,
 		VM_READ|VM_EXEC|

arch/xtensa/configs/generic_kc705_defconfig

@@ -11,7 +11,6 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_MEMCG=y
 CONFIG_NAMESPACES=y
 CONFIG_SCHED_AUTOGROUP=y

arch/xtensa/configs/smp_lx200_defconfig

@@ -11,7 +11,6 @@ CONFIG_CGROUP_FREEZER=y
 CONFIG_CGROUP_DEVICE=y
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y
-CONFIG_RESOURCE_COUNTERS=y
 CONFIG_MEMCG=y
 CONFIG_NAMESPACES=y
 CONFIG_SCHED_AUTOGROUP=y

drivers/gpu/drm/amd/amdgpu/amdgpu_mn.c

@@ -232,7 +232,10 @@ static struct amdgpu_mn *amdgpu_mn_get(struct amdgpu_device *adev)
 	int r;
 
 	mutex_lock(&adev->mn_lock);
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem)) {
+		mutex_unlock(&adev->mn_lock);
+		return ERR_PTR(-EINTR);
+	}
 
 	hash_for_each_possible(adev->mn_hash, rmn, node, (unsigned long)mm)
 		if (rmn->mm == mm)

drivers/gpu/drm/i915/i915_gem.c

@@ -1721,7 +1721,10 @@ i915_gem_mmap_ioctl(struct drm_device *dev, void *data,
 		struct mm_struct *mm = current->mm;
 		struct vm_area_struct *vma;
 
-		down_write(&mm->mmap_sem);
+		if (down_write_killable(&mm->mmap_sem)) {
+			drm_gem_object_unreference_unlocked(obj);
+			return -EINTR;
+		}
 		vma = find_vma(mm, addr);
 		if (vma)
 			vma->vm_page_prot =

drivers/gpu/drm/radeon/radeon_mn.c

@@ -186,7 +186,9 @@ static struct radeon_mn *radeon_mn_get(struct radeon_device *rdev)
 	struct radeon_mn *rmn;
 	int r;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return ERR_PTR(-EINTR);
+
 	mutex_lock(&rdev->mn_lock);
 
 	hash_for_each_possible(rdev->mn_hash, rmn, node, (unsigned long)mm)

drivers/memstick/core/mspro_block.c

@@ -1033,12 +1033,11 @@ static int mspro_block_read_attributes(struct memstick_dev *card)
 	}
 	msb->attr_group.name = "media_attributes";
 
-	buffer = kmalloc(attr_len, GFP_KERNEL);
+	buffer = kmemdup(attr, attr_len, GFP_KERNEL);
 	if (!buffer) {
 		rc = -ENOMEM;
 		goto out_free_attr;
 	}
-	memcpy(buffer, (char *)attr, attr_len);
 
 	for (cnt = 0; cnt < attr_count; ++cnt) {
 		s_attr = kzalloc(sizeof(struct mspro_sys_attr), GFP_KERNEL);

drivers/memstick/host/rtsx_usb_ms.c

@@ -706,7 +706,7 @@ poll_again:
 		if (host->eject)
 			break;
 
-		msleep(1000);
+		schedule_timeout_idle(HZ);
 	}
 
 	complete(&host->detect_ms_exit);

fs/Kconfig.binfmt

@@ -1,6 +1,7 @@
 config BINFMT_ELF
 	bool "Kernel support for ELF binaries"
 	depends on MMU && (BROKEN || !FRV)
+	select ELFCORE
 	default y
 	---help---
 	  ELF (Executable and Linkable Format) is a format for libraries and
@@ -26,6 +27,7 @@ config BINFMT_ELF
 config COMPAT_BINFMT_ELF
 	bool
 	depends on COMPAT && BINFMT_ELF
+	select ELFCORE
 
 config ARCH_BINFMT_ELF_STATE
 	bool
@@ -34,6 +36,7 @@ config BINFMT_ELF_FDPIC
 	bool "Kernel support for FDPIC ELF binaries"
 	default y
 	depends on (FRV || BLACKFIN || (SUPERH32 && !MMU) || C6X)
+	select ELFCORE
 	help
 	  ELF FDPIC binaries are based on ELF, but allow the individual load
 	  segments of a binary to be located in memory independently of each
@@ -43,6 +46,11 @@ config BINFMT_ELF_FDPIC
 
 	  It is also possible to run FDPIC ELF binaries on MMU linux also.
 
+config ELFCORE
+	bool
+	help
+	  This option enables kernel/elfcore.o.
+
 config CORE_DUMP_DEFAULT_ELF_HEADERS
 	bool "Write ELF core dumps with partial segments"
 	default y

fs/aio.c

@@ -496,7 +496,12 @@ static int aio_setup_ring(struct kioctx *ctx)
 	ctx->mmap_size = nr_pages * PAGE_SIZE;
 	pr_debug("attempting mmap of %lu bytes\n", ctx->mmap_size);
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem)) {
+		ctx->mmap_size = 0;
+		aio_free_ring(ctx);
+		return -EINTR;
+	}
+
 	ctx->mmap_base = do_mmap_pgoff(ctx->aio_ring_file, 0, ctx->mmap_size,
 				       PROT_READ | PROT_WRITE,
 				       MAP_SHARED, 0, &unused);

fs/befs/datastream.c

@@ -48,7 +48,7 @@ struct buffer_head *
 befs_read_datastream(struct super_block *sb, const befs_data_stream *ds,
 		     befs_off_t pos, uint * off)
 {
-	struct buffer_head *bh = NULL;
+	struct buffer_head *bh;
 	befs_block_run run;
 	befs_blocknr_t block;	/* block coresponding to pos */
 
@@ -127,7 +127,7 @@ befs_read_lsymlink(struct super_block *sb, const befs_data_stream *ds,
 {
 	befs_off_t bytes_read = 0;	/* bytes readed */
 	u16 plen;
-	struct buffer_head *bh = NULL;
+	struct buffer_head *bh;
 	befs_debug(sb, "---> %s length: %llu", __func__, len);
 
 	while (bytes_read < len) {
@@ -429,7 +429,7 @@ befs_find_brun_dblindirect(struct super_block *sb,
 	struct buffer_head *dbl_indir_block;
 	struct buffer_head *indir_block;
 	befs_block_run indir_run;
-	befs_disk_inode_addr *iaddr_array = NULL;
+	befs_disk_inode_addr *iaddr_array;
 	struct befs_sb_info *befs_sb = BEFS_SB(sb);
 
 	befs_blocknr_t indir_start_blk =
@@ -488,7 +488,6 @@ befs_find_brun_dblindirect(struct super_block *sb,
 	iaddr_array = (befs_disk_inode_addr *) dbl_indir_block->b_data;
 	indir_run = fsrun_to_cpu(sb, iaddr_array[dbl_block_indx]);
 	brelse(dbl_indir_block);
-	iaddr_array = NULL;
 
 	/* Read indirect block */
 	which_block = indir_indx / befs_iaddrs_per_block(sb);
@@ -513,7 +512,6 @@ befs_find_brun_dblindirect(struct super_block *sb,
 	iaddr_array = (befs_disk_inode_addr *) indir_block->b_data;
 	*run = fsrun_to_cpu(sb, iaddr_array[block_indx]);
 	brelse(indir_block);
-	iaddr_array = NULL;
 
 	blockno_at_run_start = indir_start_blk;
 	blockno_at_run_start += diblklen * dblindir_indx;

fs/befs/io.c

@@ -26,7 +26,7 @@
 struct buffer_head *
 befs_bread_iaddr(struct super_block *sb, befs_inode_addr iaddr)
 {
-	struct buffer_head *bh = NULL;
+	struct buffer_head *bh;
 	befs_blocknr_t block = 0;
 	struct befs_sb_info *befs_sb = BEFS_SB(sb);
 
@@ -63,7 +63,7 @@ befs_bread_iaddr(struct super_block *sb, befs_inode_addr iaddr)
 struct buffer_head *
 befs_bread(struct super_block *sb, befs_blocknr_t block)
 {
-	struct buffer_head *bh = NULL;
+	struct buffer_head *bh;
 
 	befs_debug(sb, "---> Enter %s %lu", __func__, (unsigned long)block);
 

fs/befs/linuxvfs.c

@@ -155,7 +155,7 @@ befs_get_block(struct inode *inode, sector_t block,
 static struct dentry *
 befs_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
-	struct inode *inode = NULL;
+	struct inode *inode;
 	struct super_block *sb = dir->i_sb;
 	const befs_data_stream *ds = &BEFS_I(dir)->i_data.ds;
 	befs_off_t offset;
@@ -294,10 +294,10 @@ static void init_once(void *foo)
 
 static struct inode *befs_iget(struct super_block *sb, unsigned long ino)
 {
-	struct buffer_head *bh = NULL;
-	befs_inode *raw_inode = NULL;
+	struct buffer_head *bh;
+	befs_inode *raw_inode;
 	struct befs_sb_info *befs_sb = BEFS_SB(sb);
-	struct befs_inode_info *befs_ino = NULL;
+	struct befs_inode_info *befs_ino;
 	struct inode *inode;
 	long ret = -EIO;
 

fs/binfmt_aout.c

@@ -297,7 +297,10 @@ static int load_aout_binary(struct linux_binprm * bprm)
 		}
 
 		if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) {
-			vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+			error = vm_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
+			if (IS_ERR_VALUE(error))
+				return error;
+
 			read_code(bprm->file, N_TXTADDR(ex), fd_offset,
 				  ex.a_text + ex.a_data);
 			goto beyond_if;
@@ -378,8 +381,10 @@ static int load_aout_library(struct file *file)
 			       "N_TXTOFF is not page aligned. Please convert library: %pD\n",
 			       file);
 		}
-		vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
-		
+		retval = vm_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
+		if (IS_ERR_VALUE(retval))
+			goto out;
+
 		read_code(file, start_addr, N_TXTOFF(ex),
 			  ex.a_text + ex.a_data);
 		retval = 0;

fs/binfmt_elf.c

@@ -1176,8 +1176,11 @@ static int load_elf_library(struct file *file)
 	len = ELF_PAGESTART(eppnt->p_filesz + eppnt->p_vaddr +
 			    ELF_MIN_ALIGN - 1);
 	bss = eppnt->p_memsz + eppnt->p_vaddr;
-	if (bss > len)
-		vm_brk(len, bss - len);
+	if (bss > len) {
+		error = vm_brk(len, bss - len);
+		if (BAD_ADDR(error))
+			goto out_free_ph;
+	}
 	error = 0;
 
 out_free_ph:

fs/coredump.c

@@ -413,7 +413,9 @@ static int coredump_wait(int exit_code, struct core_state *core_state)
 	core_state->dumper.task = tsk;
 	core_state->dumper.next = NULL;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
+
 	if (!mm->core_state)
 		core_waiters = zap_threads(tsk, mm, core_state, exit_code);
 	up_write(&mm->mmap_sem);

fs/exec.c

@@ -243,10 +243,6 @@ static void put_arg_page(struct page *page)
 	put_page(page);
 }
 
-static void free_arg_page(struct linux_binprm *bprm, int i)
-{
-}
-
 static void free_arg_pages(struct linux_binprm *bprm)
 {
 }
@@ -267,7 +263,10 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
 	if (!vma)
 		return -ENOMEM;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem)) {
+		err = -EINTR;
+		goto err_free;
+	}
 	vma->vm_mm = mm;
 
 	/*
@@ -294,6 +293,7 @@ static int __bprm_mm_init(struct linux_binprm *bprm)
 	return 0;
 err:
 	up_write(&mm->mmap_sem);
+err_free:
 	bprm->vma = NULL;
 	kmem_cache_free(vm_area_cachep, vma);
 	return err;
@@ -700,7 +700,9 @@ int setup_arg_pages(struct linux_binprm *bprm,
 		bprm->loader -= stack_shift;
 	bprm->exec -= stack_shift;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
+
 	vm_flags = VM_STACK_FLAGS;
 
 	/*
@@ -1499,9 +1501,6 @@ int remove_arg_zero(struct linux_binprm *bprm)
 
 		kunmap_atomic(kaddr);
 		put_arg_page(page);
-
-		if (offset == PAGE_SIZE)
-			free_arg_page(bprm, (bprm->p >> PAGE_SHIFT) - 1);
 	} while (offset == PAGE_SIZE);
 
 	bprm->p++;

fs/nilfs2/alloc.c

@@ -13,13 +13,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Original code was written by Koji Sato <koji@osrg.net>.
- * Two allocators were unified by Ryusuke Konishi <ryusuke@osrg.net>,
- *                                Amagai Yoshiji <amagai@osrg.net>.
+ * Originally written by Koji Sato.
+ * Two allocators were unified by Ryusuke Konishi and Amagai Yoshiji.
  */
 
 #include <linux/types.h>
@@ -58,7 +53,7 @@ nilfs_palloc_groups_count(const struct inode *inode)
  * @inode: inode of metadata file using this allocator
  * @entry_size: size of the persistent object
  */
-int nilfs_palloc_init_blockgroup(struct inode *inode, unsigned entry_size)
+int nilfs_palloc_init_blockgroup(struct inode *inode, unsigned int entry_size)
 {
 	struct nilfs_mdt_info *mi = NILFS_MDT(inode);
 
@@ -73,13 +68,17 @@ int nilfs_palloc_init_blockgroup(struct inode *inode, unsigned entry_size)
 	mi->mi_blocks_per_group =
 		DIV_ROUND_UP(nilfs_palloc_entries_per_group(inode),
 			     mi->mi_entries_per_block) + 1;
-		/* Number of blocks in a group including entry blocks and
-		   a bitmap block */
+		/*
+		 * Number of blocks in a group including entry blocks
+		 * and a bitmap block
+		 */
 	mi->mi_blocks_per_desc_block =
 		nilfs_palloc_groups_per_desc_block(inode) *
 		mi->mi_blocks_per_group + 1;
-		/* Number of blocks per descriptor including the
-		   descriptor block */
+		/*
+		 * Number of blocks per descriptor including the
+		 * descriptor block
+		 */
 	return 0;
 }
 
@@ -389,7 +388,7 @@ void *nilfs_palloc_block_get_entry(const struct inode *inode, __u64 nr,
  */
 static int nilfs_palloc_find_available_slot(unsigned char *bitmap,
 					    unsigned long target,
-					    unsigned bsize,
+					    unsigned int bsize,
 					    spinlock_t *lock)
 {
 	int pos, end = bsize;
@@ -624,7 +623,7 @@ void nilfs_palloc_commit_free_entry(struct inode *inode,
 
 	if (!nilfs_clear_bit_atomic(lock, group_offset, bitmap))
 		nilfs_warning(inode->i_sb, __func__,
-			      "entry number %llu already freed: ino=%lu\n",
+			      "entry number %llu already freed: ino=%lu",
 			      (unsigned long long)req->pr_entry_nr,
 			      (unsigned long)inode->i_ino);
 	else
@@ -665,7 +664,7 @@ void nilfs_palloc_abort_alloc_entry(struct inode *inode,
 
 	if (!nilfs_clear_bit_atomic(lock, group_offset, bitmap))
 		nilfs_warning(inode->i_sb, __func__,
-			      "entry number %llu already freed: ino=%lu\n",
+			      "entry number %llu already freed: ino=%lu",
 			      (unsigned long long)req->pr_entry_nr,
 			      (unsigned long)inode->i_ino);
 	else
@@ -740,8 +739,8 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
 	unsigned long group, group_offset;
 	__u64 group_min_nr, last_nrs[8];
 	const unsigned long epg = nilfs_palloc_entries_per_group(inode);
-	const unsigned epb = NILFS_MDT(inode)->mi_entries_per_block;
-	unsigned entry_start, end, pos;
+	const unsigned int epb = NILFS_MDT(inode)->mi_entries_per_block;
+	unsigned int entry_start, end, pos;
 	spinlock_t *lock;
 	int i, j, k, ret;
 	u32 nfree;
@@ -774,7 +773,7 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
 			if (!nilfs_clear_bit_atomic(lock, group_offset,
 						    bitmap)) {
 				nilfs_warning(inode->i_sb, __func__,
-					      "entry number %llu already freed: ino=%lu\n",
+					      "entry number %llu already freed: ino=%lu",
 					      (unsigned long long)entry_nrs[j],
 					      (unsigned long)inode->i_ino);
 			} else {
@@ -819,7 +818,7 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
 							      last_nrs[k]);
 			if (ret && ret != -ENOENT) {
 				nilfs_warning(inode->i_sb, __func__,
-					      "failed to delete block of entry %llu: ino=%lu, err=%d\n",
+					      "failed to delete block of entry %llu: ino=%lu, err=%d",
 					      (unsigned long long)last_nrs[k],
 					      (unsigned long)inode->i_ino, ret);
 			}
@@ -838,7 +837,7 @@ int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
 			ret = nilfs_palloc_delete_bitmap_block(inode, group);
 			if (ret && ret != -ENOENT) {
 				nilfs_warning(inode->i_sb, __func__,
-					      "failed to delete bitmap block of group %lu: ino=%lu, err=%d\n",
+					      "failed to delete bitmap block of group %lu: ino=%lu, err=%d",
 					      group,
 					      (unsigned long)inode->i_ino, ret);
 			}

fs/nilfs2/alloc.h

@@ -13,13 +13,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Original code was written by Koji Sato <koji@osrg.net>.
- * Two allocators were unified by Ryusuke Konishi <ryusuke@osrg.net>,
- *                                Amagai Yoshiji <amagai@osrg.net>.
+ * Originally written by Koji Sato.
+ * Two allocators were unified by Ryusuke Konishi and Amagai Yoshiji.
  */
 
 #ifndef _NILFS_ALLOC_H
@@ -42,7 +37,7 @@ nilfs_palloc_entries_per_group(const struct inode *inode)
 	return 1UL << (inode->i_blkbits + 3 /* log2(8 = CHAR_BITS) */);
 }
 
-int nilfs_palloc_init_blockgroup(struct inode *, unsigned);
+int nilfs_palloc_init_blockgroup(struct inode *, unsigned int);
 int nilfs_palloc_get_entry_block(struct inode *, __u64, int,
 				 struct buffer_head **);
 void *nilfs_palloc_block_get_entry(const struct inode *, __u64,

fs/nilfs2/bmap.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #include <linux/fs.h>
@@ -46,7 +42,7 @@ static int nilfs_bmap_convert_error(struct nilfs_bmap *bmap,
 
 	if (err == -EINVAL) {
 		nilfs_error(inode->i_sb, fname,
-			    "broken bmap (inode number=%lu)\n", inode->i_ino);
+			    "broken bmap (inode number=%lu)", inode->i_ino);
 		err = -EIO;
 	}
 	return err;
@@ -97,7 +93,7 @@ int nilfs_bmap_lookup_at_level(struct nilfs_bmap *bmap, __u64 key, int level,
 }
 
 int nilfs_bmap_lookup_contig(struct nilfs_bmap *bmap, __u64 key, __u64 *ptrp,
-			     unsigned maxblocks)
+			     unsigned int maxblocks)
 {
 	int ret;
 

fs/nilfs2/bmap.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #ifndef _NILFS_BMAP_H
@@ -61,7 +57,7 @@ struct nilfs_bmap_stats {
 struct nilfs_bmap_operations {
 	int (*bop_lookup)(const struct nilfs_bmap *, __u64, int, __u64 *);
 	int (*bop_lookup_contig)(const struct nilfs_bmap *, __u64, __u64 *,
-				 unsigned);
+				 unsigned int);
 	int (*bop_insert)(struct nilfs_bmap *, __u64, __u64);
 	int (*bop_delete)(struct nilfs_bmap *, __u64);
 	void (*bop_clear)(struct nilfs_bmap *);
@@ -126,10 +122,14 @@ struct nilfs_bmap {
 
 /* pointer type */
 #define NILFS_BMAP_PTR_P	0	/* physical block number (i.e. LBN) */
-#define NILFS_BMAP_PTR_VS	1	/* virtual block number (single
-					   version) */
-#define NILFS_BMAP_PTR_VM	2	/* virtual block number (has multiple
-					   versions) */
+#define NILFS_BMAP_PTR_VS	1	/*
+					 * virtual block number (single
+					 * version)
+					 */
+#define NILFS_BMAP_PTR_VM	2	/*
+					 * virtual block number (has multiple
+					 * versions)
+					 */
 #define NILFS_BMAP_PTR_U	(-1)	/* never perform pointer operations */
 
 #define NILFS_BMAP_USE_VBN(bmap)	((bmap)->b_ptr_type > 0)
@@ -154,7 +154,7 @@ struct nilfs_bmap_store {
 int nilfs_bmap_test_and_clear_dirty(struct nilfs_bmap *);
 int nilfs_bmap_read(struct nilfs_bmap *, struct nilfs_inode *);
 void nilfs_bmap_write(struct nilfs_bmap *, struct nilfs_inode *);
-int nilfs_bmap_lookup_contig(struct nilfs_bmap *, __u64, __u64 *, unsigned);
+int nilfs_bmap_lookup_contig(struct nilfs_bmap *, __u64, __u64 *, unsigned int);
 int nilfs_bmap_insert(struct nilfs_bmap *bmap, __u64 key, unsigned long rec);
 int nilfs_bmap_delete(struct nilfs_bmap *bmap, __u64 key);
 int nilfs_bmap_seek_key(struct nilfs_bmap *bmap, __u64 start, __u64 *keyp);

fs/nilfs2/btnode.c

@@ -13,13 +13,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * This file was originally written by Seiji Kihara <kihara@osrg.net>
- * and fully revised by Ryusuke Konishi <ryusuke@osrg.net> for
- * stabilization and simplification.
+ * Originally written by Seiji Kihara.
+ * Fully revised by Ryusuke Konishi for stabilization and simplification.
  *
  */
 

fs/nilfs2/btnode.h

@@ -13,12 +13,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Seiji Kihara <kihara@osrg.net>
- * Revised by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Seiji Kihara.
+ * Revised by Ryusuke Konishi.
  */
 
 #ifndef _NILFS_BTNODE_H

fs/nilfs2/btree.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #include <linux/slab.h>
@@ -689,7 +685,8 @@ static int nilfs_btree_lookup(const struct nilfs_bmap *btree,
 }
 
 static int nilfs_btree_lookup_contig(const struct nilfs_bmap *btree,
-				     __u64 key, __u64 *ptrp, unsigned maxblocks)
+				     __u64 key, __u64 *ptrp,
+				     unsigned int maxblocks)
 {
 	struct nilfs_btree_path *path;
 	struct nilfs_btree_node *node;
@@ -1032,12 +1029,12 @@ static __u64 nilfs_btree_find_target_v(const struct nilfs_bmap *btree,
 	if (ptr != NILFS_BMAP_INVALID_PTR)
 		/* sequential access */
 		return ptr;
-	else {
-		ptr = nilfs_btree_find_near(btree, path);
-		if (ptr != NILFS_BMAP_INVALID_PTR)
-			/* near */
-			return ptr;
-	}
+
+	ptr = nilfs_btree_find_near(btree, path);
+	if (ptr != NILFS_BMAP_INVALID_PTR)
+		/* near */
+		return ptr;
+
 	/* block group */
 	return nilfs_bmap_find_target_in_group(btree);
 }

fs/nilfs2/btree.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #ifndef _NILFS_BTREE_H

fs/nilfs2/cpfile.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #include <linux/kernel.h>
@@ -41,6 +37,7 @@ static unsigned long
 nilfs_cpfile_get_blkoff(const struct inode *cpfile, __u64 cno)
 {
 	__u64 tcno = cno + NILFS_MDT(cpfile)->mi_first_entry_offset - 1;
+
 	do_div(tcno, nilfs_cpfile_checkpoints_per_block(cpfile));
 	return (unsigned long)tcno;
 }
@@ -50,6 +47,7 @@ static unsigned long
 nilfs_cpfile_get_offset(const struct inode *cpfile, __u64 cno)
 {
 	__u64 tcno = cno + NILFS_MDT(cpfile)->mi_first_entry_offset - 1;
+
 	return do_div(tcno, nilfs_cpfile_checkpoints_per_block(cpfile));
 }
 
@@ -433,7 +431,8 @@ static void nilfs_cpfile_checkpoint_to_cpinfo(struct inode *cpfile,
 }
 
 static ssize_t nilfs_cpfile_do_get_cpinfo(struct inode *cpfile, __u64 *cnop,
-					  void *buf, unsigned cisz, size_t nci)
+					  void *buf, unsigned int cisz,
+					  size_t nci)
 {
 	struct nilfs_checkpoint *cp;
 	struct nilfs_cpinfo *ci = buf;
@@ -484,7 +483,8 @@ static ssize_t nilfs_cpfile_do_get_cpinfo(struct inode *cpfile, __u64 *cnop,
 }
 
 static ssize_t nilfs_cpfile_do_get_ssinfo(struct inode *cpfile, __u64 *cnop,
-					  void *buf, unsigned cisz, size_t nci)
+					  void *buf, unsigned int cisz,
+					  size_t nci)
 {
 	struct buffer_head *bh;
 	struct nilfs_cpfile_header *header;
@@ -570,7 +570,7 @@ static ssize_t nilfs_cpfile_do_get_ssinfo(struct inode *cpfile, __u64 *cnop,
  */
 
 ssize_t nilfs_cpfile_get_cpinfo(struct inode *cpfile, __u64 *cnop, int mode,
-				void *buf, unsigned cisz, size_t nci)
+				void *buf, unsigned int cisz, size_t nci)
 {
 	switch (mode) {
 	case NILFS_CHECKPOINT:
@@ -870,8 +870,10 @@ int nilfs_cpfile_is_snapshot(struct inode *cpfile, __u64 cno)
 	void *kaddr;
 	int ret;
 
-	/* CP number is invalid if it's zero or larger than the
-	largest	exist one.*/
+	/*
+	 * CP number is invalid if it's zero or larger than the
+	 * largest existing one.
+	 */
 	if (cno == 0 || cno >= nilfs_mdt_cno(cpfile))
 		return -ENOENT;
 	down_read(&NILFS_MDT(cpfile)->mi_sem);

fs/nilfs2/cpfile.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #ifndef _NILFS_CPFILE_H
@@ -37,8 +33,8 @@ int nilfs_cpfile_delete_checkpoint(struct inode *, __u64);
 int nilfs_cpfile_change_cpmode(struct inode *, __u64, int);
 int nilfs_cpfile_is_snapshot(struct inode *, __u64);
 int nilfs_cpfile_get_stat(struct inode *, struct nilfs_cpstat *);
-ssize_t nilfs_cpfile_get_cpinfo(struct inode *, __u64 *, int, void *, unsigned,
-				size_t);
+ssize_t nilfs_cpfile_get_cpinfo(struct inode *, __u64 *, int, void *,
+				unsigned int, size_t);
 
 int nilfs_cpfile_read(struct super_block *sb, size_t cpsize,
 		      struct nilfs_inode *raw_inode, struct inode **inodep);

fs/nilfs2/dat.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #include <linux/types.h>
@@ -428,7 +424,7 @@ int nilfs_dat_translate(struct inode *dat, __u64 vblocknr, sector_t *blocknrp)
 	return ret;
 }
 
-ssize_t nilfs_dat_get_vinfo(struct inode *dat, void *buf, unsigned visz,
+ssize_t nilfs_dat_get_vinfo(struct inode *dat, void *buf, unsigned int visz,
 			    size_t nvi)
 {
 	struct buffer_head *entry_bh;

fs/nilfs2/dat.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #ifndef _NILFS_DAT_H
@@ -51,7 +47,7 @@ void nilfs_dat_abort_update(struct inode *, struct nilfs_palloc_req *,
 int nilfs_dat_mark_dirty(struct inode *, __u64);
 int nilfs_dat_freev(struct inode *, __u64 *, size_t);
 int nilfs_dat_move(struct inode *, __u64, sector_t);
-ssize_t nilfs_dat_get_vinfo(struct inode *, void *, unsigned, size_t);
+ssize_t nilfs_dat_get_vinfo(struct inode *, void *, unsigned int, size_t);
 
 int nilfs_dat_read(struct super_block *sb, size_t entry_size,
 		   struct nilfs_inode *raw_inode, struct inode **inodep);

fs/nilfs2/dir.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Modified for NILFS by Amagai Yoshiji <amagai@osrg.net>
+ * Modified for NILFS by Amagai Yoshiji.
  */
 /*
  *  linux/fs/ext2/dir.c
@@ -50,7 +46,7 @@
  * nilfs uses block-sized chunks. Arguably, sector-sized ones would be
  * more robust, but we have what we have
  */
-static inline unsigned nilfs_chunk_size(struct inode *inode)
+static inline unsigned int nilfs_chunk_size(struct inode *inode)
 {
 	return inode->i_sb->s_blocksize;
 }
@@ -65,9 +61,9 @@ static inline void nilfs_put_page(struct page *page)
  * Return the offset into page `page_nr' of the last valid
  * byte in that page, plus one.
  */
-static unsigned nilfs_last_byte(struct inode *inode, unsigned long page_nr)
+static unsigned int nilfs_last_byte(struct inode *inode, unsigned long page_nr)
 {
-	unsigned last_byte = inode->i_size;
+	unsigned int last_byte = inode->i_size;
 
 	last_byte -= page_nr << PAGE_SHIFT;
 	if (last_byte > PAGE_SIZE)
@@ -75,20 +71,22 @@ static unsigned nilfs_last_byte(struct inode *inode, unsigned long page_nr)
 	return last_byte;
 }
 
-static int nilfs_prepare_chunk(struct page *page, unsigned from, unsigned to)
+static int nilfs_prepare_chunk(struct page *page, unsigned int from,
+			       unsigned int to)
 {
 	loff_t pos = page_offset(page) + from;
+
 	return __block_write_begin(page, pos, to - from, nilfs_get_block);
 }
 
 static void nilfs_commit_chunk(struct page *page,
 			       struct address_space *mapping,
-			       unsigned from, unsigned to)
+			       unsigned int from, unsigned int to)
 {
 	struct inode *dir = mapping->host;
 	loff_t pos = page_offset(page) + from;
-	unsigned len = to - from;
-	unsigned nr_dirty, copied;
+	unsigned int len = to - from;
+	unsigned int nr_dirty, copied;
 	int err;
 
 	nr_dirty = nilfs_page_count_clean_buffers(page, from, to);
@@ -106,10 +104,10 @@ static bool nilfs_check_page(struct page *page)
 {
 	struct inode *dir = page->mapping->host;
 	struct super_block *sb = dir->i_sb;
-	unsigned chunk_size = nilfs_chunk_size(dir);
+	unsigned int chunk_size = nilfs_chunk_size(dir);
 	char *kaddr = page_address(page);
-	unsigned offs, rec_len;
-	unsigned limit = PAGE_SIZE;
+	unsigned int offs, rec_len;
+	unsigned int limit = PAGE_SIZE;
 	struct nilfs_dir_entry *p;
 	char *error;
 
@@ -259,7 +257,6 @@ static int nilfs_readdir(struct file *file, struct dir_context *ctx)
 	unsigned int offset = pos & ~PAGE_MASK;
 	unsigned long n = pos >> PAGE_SHIFT;
 	unsigned long npages = dir_pages(inode);
-/*	unsigned chunk_mask = ~(nilfs_chunk_size(inode)-1); */
 
 	if (pos > inode->i_size - NILFS_DIR_REC_LEN(1))
 		return 0;
@@ -321,7 +318,7 @@ nilfs_find_entry(struct inode *dir, const struct qstr *qstr,
 {
 	const unsigned char *name = qstr->name;
 	int namelen = qstr->len;
-	unsigned reclen = NILFS_DIR_REC_LEN(namelen);
+	unsigned int reclen = NILFS_DIR_REC_LEN(namelen);
 	unsigned long start, n;
 	unsigned long npages = dir_pages(dir);
 	struct page *page = NULL;
@@ -340,6 +337,7 @@ nilfs_find_entry(struct inode *dir, const struct qstr *qstr,
 	n = start;
 	do {
 		char *kaddr;
+
 		page = nilfs_get_page(dir, n);
 		if (!IS_ERR(page)) {
 			kaddr = page_address(page);
@@ -410,8 +408,8 @@ ino_t nilfs_inode_by_name(struct inode *dir, const struct qstr *qstr)
 void nilfs_set_link(struct inode *dir, struct nilfs_dir_entry *de,
 		    struct page *page, struct inode *inode)
 {
-	unsigned from = (char *) de - (char *) page_address(page);
-	unsigned to = from + nilfs_rec_len_from_disk(de->rec_len);
+	unsigned int from = (char *)de - (char *)page_address(page);
+	unsigned int to = from + nilfs_rec_len_from_disk(de->rec_len);
 	struct address_space *mapping = page->mapping;
 	int err;
 
@@ -433,15 +431,15 @@ int nilfs_add_link(struct dentry *dentry, struct inode *inode)
 	struct inode *dir = d_inode(dentry->d_parent);
 	const unsigned char *name = dentry->d_name.name;
 	int namelen = dentry->d_name.len;
-	unsigned chunk_size = nilfs_chunk_size(dir);
-	unsigned reclen = NILFS_DIR_REC_LEN(namelen);
+	unsigned int chunk_size = nilfs_chunk_size(dir);
+	unsigned int reclen = NILFS_DIR_REC_LEN(namelen);
 	unsigned short rec_len, name_len;
 	struct page *page = NULL;
 	struct nilfs_dir_entry *de;
 	unsigned long npages = dir_pages(dir);
 	unsigned long n;
 	char *kaddr;
-	unsigned from, to;
+	unsigned int from, to;
 	int err;
 
 	/*
@@ -533,13 +531,14 @@ int nilfs_delete_entry(struct nilfs_dir_entry *dir, struct page *page)
 	struct address_space *mapping = page->mapping;
 	struct inode *inode = mapping->host;
 	char *kaddr = page_address(page);
-	unsigned from = ((char *)dir - kaddr) & ~(nilfs_chunk_size(inode) - 1);
-	unsigned to = ((char *)dir - kaddr) +
-		nilfs_rec_len_from_disk(dir->rec_len);
-	struct nilfs_dir_entry *pde = NULL;
-	struct nilfs_dir_entry *de = (struct nilfs_dir_entry *)(kaddr + from);
+	unsigned int from, to;
+	struct nilfs_dir_entry *de, *pde = NULL;
 	int err;
 
+	from = ((char *)dir - kaddr) & ~(nilfs_chunk_size(inode) - 1);
+	to = ((char *)dir - kaddr) + nilfs_rec_len_from_disk(dir->rec_len);
+	de = (struct nilfs_dir_entry *)(kaddr + from);
+
 	while ((char *)de < (char *)dir) {
 		if (de->rec_len == 0) {
 			nilfs_error(inode->i_sb, __func__,
@@ -572,7 +571,7 @@ int nilfs_make_empty(struct inode *inode, struct inode *parent)
 {
 	struct address_space *mapping = inode->i_mapping;
 	struct page *page = grab_cache_page(mapping, 0);
-	unsigned chunk_size = nilfs_chunk_size(inode);
+	unsigned int chunk_size = nilfs_chunk_size(inode);
 	struct nilfs_dir_entry *de;
 	int err;
 	void *kaddr;
@@ -630,8 +629,8 @@ int nilfs_empty_dir(struct inode *inode)
 		while ((char *)de <= kaddr) {
 			if (de->rec_len == 0) {
 				nilfs_error(inode->i_sb, __func__,
-					    "zero-length directory entry "
-					    "(kaddr=%p, de=%p)\n", kaddr, de);
+					    "zero-length directory entry (kaddr=%p, de=%p)",
+					    kaddr, de);
 				goto not_empty;
 			}
 			if (de->inode != 0) {

fs/nilfs2/direct.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #include <linux/errno.h>
@@ -62,7 +58,7 @@ static int nilfs_direct_lookup(const struct nilfs_bmap *direct,
 
 static int nilfs_direct_lookup_contig(const struct nilfs_bmap *direct,
 				      __u64 key, __u64 *ptrp,
-				      unsigned maxblocks)
+				      unsigned int maxblocks)
 {
 	struct inode *dat = NULL;
 	__u64 ptr, ptr2;
@@ -83,7 +79,8 @@ static int nilfs_direct_lookup_contig(const struct nilfs_bmap *direct,
 		ptr = blocknr;
 	}
 
-	maxblocks = min_t(unsigned, maxblocks, NILFS_DIRECT_KEY_MAX - key + 1);
+	maxblocks = min_t(unsigned int, maxblocks,
+			  NILFS_DIRECT_KEY_MAX - key + 1);
 	for (cnt = 1; cnt < maxblocks &&
 		     (ptr2 = nilfs_direct_get_ptr(direct, key + cnt)) !=
 		     NILFS_BMAP_INVALID_PTR;
@@ -110,9 +107,9 @@ nilfs_direct_find_target_v(const struct nilfs_bmap *direct, __u64 key)
 	if (ptr != NILFS_BMAP_INVALID_PTR)
 		/* sequential access */
 		return ptr;
-	else
-		/* block group */
-		return nilfs_bmap_find_target_in_group(direct);
+
+	/* block group */
+	return nilfs_bmap_find_target_in_group(direct);
 }
 
 static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)

fs/nilfs2/direct.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #ifndef _NILFS_DIRECT_H

fs/nilfs2/export.h

@@ -20,6 +20,6 @@ struct nilfs_fid {
 
 	u32 parent_gen;
 	u64 parent_ino;
-} __attribute__ ((packed));
+} __packed;
 
 #endif

fs/nilfs2/file.c

@@ -13,12 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Amagai Yoshiji <amagai@osrg.net>,
- *            Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Amagai Yoshiji and Ryusuke Konishi.
  */
 
 #include <linux/fs.h>

fs/nilfs2/gcinode.c

@@ -13,13 +13,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Seiji Kihara <kihara@osrg.net>, Amagai Yoshiji <amagai@osrg.net>,
- *            and Ryusuke Konishi <ryusuke@osrg.net>.
- * Revised by Ryusuke Konishi <ryusuke@osrg.net>.
+ * Written by Seiji Kihara, Amagai Yoshiji, and Ryusuke Konishi.
+ * Revised by Ryusuke Konishi.
  *
  */
 /*

fs/nilfs2/ifile.c

@@ -13,12 +13,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Amagai Yoshiji <amagai@osrg.net>.
- * Revised by Ryusuke Konishi <ryusuke@osrg.net>.
+ * Written by Amagai Yoshiji.
+ * Revised by Ryusuke Konishi.
  *
  */
 
@@ -68,8 +64,10 @@ int nilfs_ifile_create_inode(struct inode *ifile, ino_t *out_ino,
 	struct nilfs_palloc_req req;
 	int ret;
 
-	req.pr_entry_nr = 0;  /* 0 says find free inode from beginning of
-				 a group. dull code!! */
+	req.pr_entry_nr = 0;  /*
+			       * 0 says find free inode from beginning
+			       * of a group. dull code!!
+			       */
 	req.pr_entry_bh = NULL;
 
 	ret = nilfs_palloc_prepare_alloc_entry(ifile, &req);

fs/nilfs2/ifile.h

@@ -13,12 +13,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Amagai Yoshiji <amagai@osrg.net>
- * Revised by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Amagai Yoshiji.
+ * Revised by Ryusuke Konishi.
  *
  */
 
@@ -36,6 +32,7 @@ static inline struct nilfs_inode *
 nilfs_ifile_map_inode(struct inode *ifile, ino_t ino, struct buffer_head *ibh)
 {
 	void *kaddr = kmap(ibh->b_page);
+
 	return nilfs_palloc_block_get_entry(ifile, ino, ibh, kaddr);
 }
 

fs/nilfs2/inode.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  *
  */
 
@@ -87,7 +83,7 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
 	struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
 	__u64 blknum = 0;
 	int err = 0, ret;
-	unsigned maxblocks = bh_result->b_size >> inode->i_blkbits;
+	unsigned int maxblocks = bh_result->b_size >> inode->i_blkbits;
 
 	down_read(&NILFS_MDT(nilfs->ns_dat)->mi_sem);
 	ret = nilfs_bmap_lookup_contig(ii->i_bmap, blkoff, &blknum, maxblocks);
@@ -133,11 +129,14 @@ int nilfs_get_block(struct inode *inode, sector_t blkoff,
 		/* Error handling should be detailed */
 		set_buffer_new(bh_result);
 		set_buffer_delay(bh_result);
-		map_bh(bh_result, inode->i_sb, 0); /* dbn must be changed
-						      to proper value */
+		map_bh(bh_result, inode->i_sb, 0);
+		/* Disk block number must be changed to proper value */
+
 	} else if (ret == -ENOENT) {
-		/* not found is not error (e.g. hole); must return without
-		   the mapped state flag. */
+		/*
+		 * not found is not error (e.g. hole); must return without
+		 * the mapped state flag.
+		 */
 		;
 	} else {
 		err = ret;
@@ -167,7 +166,7 @@ static int nilfs_readpage(struct file *file, struct page *page)
  * @nr_pages - number of pages to be read
  */
 static int nilfs_readpages(struct file *file, struct address_space *mapping,
-			   struct list_head *pages, unsigned nr_pages)
+			   struct list_head *pages, unsigned int nr_pages)
 {
 	return mpage_readpages(mapping, pages, nr_pages, nilfs_get_block);
 }
@@ -226,7 +225,7 @@ static int nilfs_set_page_dirty(struct page *page)
 	int ret = __set_page_dirty_nobuffers(page);
 
 	if (page_has_buffers(page)) {
-		unsigned nr_dirty = 0;
+		unsigned int nr_dirty = 0;
 		struct buffer_head *bh, *head;
 
 		/*
@@ -249,7 +248,7 @@ static int nilfs_set_page_dirty(struct page *page)
 		if (nr_dirty)
 			nilfs_set_file_dirty(inode, nr_dirty);
 	} else if (ret) {
-		unsigned nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits);
+		unsigned int nr_dirty = 1 << (PAGE_SHIFT - inode->i_blkbits);
 
 		nilfs_set_file_dirty(inode, nr_dirty);
 	}
@@ -291,8 +290,8 @@ static int nilfs_write_end(struct file *file, struct address_space *mapping,
 			   struct page *page, void *fsdata)
 {
 	struct inode *inode = mapping->host;
-	unsigned start = pos & (PAGE_SIZE - 1);
-	unsigned nr_dirty;
+	unsigned int start = pos & (PAGE_SIZE - 1);
+	unsigned int nr_dirty;
 	int err;
 
 	nr_dirty = nilfs_page_count_clean_buffers(page, start,
@@ -399,23 +398,26 @@ struct inode *nilfs_new_inode(struct inode *dir, umode_t mode)
 
 	err = nilfs_init_acl(inode, dir);
 	if (unlikely(err))
-		goto failed_after_creation; /* never occur. When supporting
-				    nilfs_init_acl(), proper cancellation of
-				    above jobs should be considered */
+		/*
+		 * Never occur.  When supporting nilfs_init_acl(),
+		 * proper cancellation of above jobs should be considered.
+		 */
+		goto failed_after_creation;
 
 	return inode;
 
  failed_after_creation:
 	clear_nlink(inode);
 	unlock_new_inode(inode);
-	iput(inode);  /* raw_inode will be deleted through
-			 nilfs_evict_inode() */
+	iput(inode);  /*
+		       * raw_inode will be deleted through
+		       * nilfs_evict_inode().
+		       */
 	goto failed;
 
  failed_ifile_create_inode:
 	make_bad_inode(inode);
-	iput(inode);  /* if i_nlink == 1, generic_forget_inode() will be
-			 called */
+	iput(inode);
  failed:
 	return ERR_PTR(err);
 }
@@ -666,8 +668,10 @@ void nilfs_write_inode_common(struct inode *inode,
 	else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
 		raw_inode->i_device_code =
 			cpu_to_le64(huge_encode_dev(inode->i_rdev));
-	/* When extending inode, nilfs->ns_inode_size should be checked
-	   for substitutions of appended fields */
+	/*
+	 * When extending inode, nilfs->ns_inode_size should be checked
+	 * for substitutions of appended fields.
+	 */
 }
 
 void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags)
@@ -685,9 +689,12 @@ void nilfs_update_inode(struct inode *inode, struct buffer_head *ibh, int flags)
 		set_bit(NILFS_I_INODE_SYNC, &ii->i_state);
 
 	nilfs_write_inode_common(inode, raw_inode, 0);
-		/* XXX: call with has_bmap = 0 is a workaround to avoid
-		   deadlock of bmap. This delays update of i_bmap to just
-		   before writing */
+		/*
+		 * XXX: call with has_bmap = 0 is a workaround to avoid
+		 * deadlock of bmap.  This delays update of i_bmap to just
+		 * before writing.
+		 */
+
 	nilfs_ifile_unmap_inode(ifile, ino, ibh);
 }
 
@@ -752,14 +759,15 @@ void nilfs_truncate(struct inode *inode)
 	nilfs_mark_inode_dirty(inode);
 	nilfs_set_file_dirty(inode, 0);
 	nilfs_transaction_commit(sb);
-	/* May construct a logical segment and may fail in sync mode.
-	   But truncate has no return value. */
+	/*
+	 * May construct a logical segment and may fail in sync mode.
+	 * But truncate has no return value.
+	 */
 }
 
 static void nilfs_clear_inode(struct inode *inode)
 {
 	struct nilfs_inode_info *ii = NILFS_I(inode);
-	struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
 
 	/*
 	 * Free resources allocated in nilfs_read_inode(), here.
@@ -768,8 +776,8 @@ static void nilfs_clear_inode(struct inode *inode)
 	brelse(ii->i_bh);
 	ii->i_bh = NULL;
 
-	if (mdi && mdi->mi_palloc_cache)
-		nilfs_palloc_destroy_cache(inode);
+	if (nilfs_is_metadata_file_inode(inode))
+		nilfs_mdt_clear(inode);
 
 	if (test_bit(NILFS_I_BMAP, &ii->i_state))
 		nilfs_bmap_clear(ii->i_bmap);
@@ -811,8 +819,10 @@ void nilfs_evict_inode(struct inode *inode)
 	if (IS_SYNC(inode))
 		nilfs_set_transaction_flag(NILFS_TI_SYNC);
 	nilfs_transaction_commit(sb);
-	/* May construct a logical segment and may fail in sync mode.
-	   But delete_inode has no return value. */
+	/*
+	 * May construct a logical segment and may fail in sync mode.
+	 * But delete_inode has no return value.
+	 */
 }
 
 int nilfs_setattr(struct dentry *dentry, struct iattr *iattr)
@@ -856,6 +866,7 @@ out_err:
 int nilfs_permission(struct inode *inode, int mask)
 {
 	struct nilfs_root *root = NILFS_I(inode)->i_root;
+
 	if ((mask & MAY_WRITE) && root &&
 	    root->cno != NILFS_CPTREE_CURRENT_CNO)
 		return -EROFS; /* snapshot is not writable */
@@ -906,7 +917,7 @@ int nilfs_inode_dirty(struct inode *inode)
 	return ret;
 }
 
-int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
+int nilfs_set_file_dirty(struct inode *inode, unsigned int nr_dirty)
 {
 	struct nilfs_inode_info *ii = NILFS_I(inode);
 	struct the_nilfs *nilfs = inode->i_sb->s_fs_info;
@@ -919,17 +930,23 @@ int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty)
 	spin_lock(&nilfs->ns_inode_lock);
 	if (!test_bit(NILFS_I_QUEUED, &ii->i_state) &&
 	    !test_bit(NILFS_I_BUSY, &ii->i_state)) {
-		/* Because this routine may race with nilfs_dispose_list(),
-		   we have to check NILFS_I_QUEUED here, too. */
+		/*
+		 * Because this routine may race with nilfs_dispose_list(),
+		 * we have to check NILFS_I_QUEUED here, too.
+		 */
 		if (list_empty(&ii->i_dirty) && igrab(inode) == NULL) {
-			/* This will happen when somebody is freeing
-			   this inode. */
+			/*
+			 * This will happen when somebody is freeing
+			 * this inode.
+			 */
 			nilfs_warning(inode->i_sb, __func__,
-				      "cannot get inode (ino=%lu)\n",
+				      "cannot get inode (ino=%lu)",
 				      inode->i_ino);
 			spin_unlock(&nilfs->ns_inode_lock);
-			return -EINVAL; /* NILFS_I_DIRTY may remain for
-					   freeing inode */
+			return -EINVAL; /*
+					 * NILFS_I_DIRTY may remain for
+					 * freeing inode.
+					 */
 		}
 		list_move_tail(&ii->i_dirty, &nilfs->ns_dirty_files);
 		set_bit(NILFS_I_QUEUED, &ii->i_state);
@@ -946,7 +963,7 @@ int __nilfs_mark_inode_dirty(struct inode *inode, int flags)
 	err = nilfs_load_inode_block(inode, &ibh);
 	if (unlikely(err)) {
 		nilfs_warning(inode->i_sb, __func__,
-			      "failed to reget inode block.\n");
+			      "failed to reget inode block.");
 		return err;
 	}
 	nilfs_update_inode(inode, ibh, flags);
@@ -973,7 +990,7 @@ void nilfs_dirty_inode(struct inode *inode, int flags)
 
 	if (is_bad_inode(inode)) {
 		nilfs_warning(inode->i_sb, __func__,
-			      "tried to mark bad_inode dirty. ignored.\n");
+			      "tried to mark bad_inode dirty. ignored.");
 		dump_stack();
 		return;
 	}

fs/nilfs2/ioctl.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #include <linux/fs.h>
@@ -783,6 +779,7 @@ static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
 	size_t nmembs = argv->v_nmembs;
 	struct nilfs_bmap *bmap = NILFS_I(nilfs->ns_dat)->i_bmap;
 	struct nilfs_bdesc *bdescs = buf;
+	struct buffer_head *bh;
 	int ret, i;
 
 	for (i = 0; i < nmembs; i++) {
@@ -800,12 +797,16 @@ static int nilfs_ioctl_mark_blocks_dirty(struct the_nilfs *nilfs,
 			/* skip dead block */
 			continue;
 		if (bdescs[i].bd_level == 0) {
-			ret = nilfs_mdt_mark_block_dirty(nilfs->ns_dat,
-							 bdescs[i].bd_offset);
-			if (ret < 0) {
+			ret = nilfs_mdt_get_block(nilfs->ns_dat,
+						  bdescs[i].bd_offset,
+						  false, NULL, &bh);
+			if (unlikely(ret)) {
 				WARN_ON(ret == -ENOENT);
 				return ret;
 			}
+			mark_buffer_dirty(bh);
+			nilfs_mdt_mark_dirty(nilfs->ns_dat);
+			put_bh(bh);
 		} else {
 			ret = nilfs_bmap_mark(bmap, bdescs[i].bd_offset,
 					      bdescs[i].bd_level);

fs/nilfs2/mdt.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  */
 
 #include <linux/buffer_head.h>
@@ -32,6 +28,7 @@
 #include "segment.h"
 #include "page.h"
 #include "mdt.h"
+#include "alloc.h"		/* nilfs_palloc_destroy_cache() */
 
 #include <trace/events/nilfs2.h>
 
@@ -393,34 +390,6 @@ int nilfs_mdt_forget_block(struct inode *inode, unsigned long block)
 	return ret;
 }
 
-/**
- * nilfs_mdt_mark_block_dirty - mark a block on the meta data file dirty.
- * @inode: inode of the meta data file
- * @block: block offset
- *
- * Return Value: On success, it returns 0. On error, the following negative
- * error code is returned.
- *
- * %-ENOMEM - Insufficient memory available.
- *
- * %-EIO - I/O error
- *
- * %-ENOENT - the specified block does not exist (hole block)
- */
-int nilfs_mdt_mark_block_dirty(struct inode *inode, unsigned long block)
-{
-	struct buffer_head *bh;
-	int err;
-
-	err = nilfs_mdt_read_block(inode, block, 0, &bh);
-	if (unlikely(err))
-		return err;
-	mark_buffer_dirty(bh);
-	nilfs_mdt_mark_dirty(inode);
-	brelse(bh);
-	return 0;
-}
-
 int nilfs_mdt_fetch_dirty(struct inode *inode)
 {
 	struct nilfs_inode_info *ii = NILFS_I(inode);
@@ -497,8 +466,32 @@ int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz)
 	return 0;
 }
 
-void nilfs_mdt_set_entry_size(struct inode *inode, unsigned entry_size,
-			      unsigned header_size)
+/**
+ * nilfs_mdt_clear - do cleanup for the metadata file
+ * @inode: inode of the metadata file
+ */
+void nilfs_mdt_clear(struct inode *inode)
+{
+	struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
+
+	if (mdi->mi_palloc_cache)
+		nilfs_palloc_destroy_cache(inode);
+}
+
+/**
+ * nilfs_mdt_destroy - release resources used by the metadata file
+ * @inode: inode of the metadata file
+ */
+void nilfs_mdt_destroy(struct inode *inode)
+{
+	struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
+
+	kfree(mdi->mi_bgl); /* kfree(NULL) is safe */
+	kfree(mdi);
+}
+
+void nilfs_mdt_set_entry_size(struct inode *inode, unsigned int entry_size,
+			      unsigned int header_size)
 {
 	struct nilfs_mdt_info *mi = NILFS_MDT(inode);
 

fs/nilfs2/mdt.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  */
 
 #ifndef _NILFS_MDT_H
@@ -57,8 +53,8 @@ struct nilfs_shadow_map {
 struct nilfs_mdt_info {
 	struct rw_semaphore	mi_sem;
 	struct blockgroup_lock *mi_bgl;
-	unsigned		mi_entry_size;
-	unsigned		mi_first_entry_offset;
+	unsigned int		mi_entry_size;
+	unsigned int		mi_first_entry_offset;
 	unsigned long		mi_entries_per_block;
 	struct nilfs_palloc_cache *mi_palloc_cache;
 	struct nilfs_shadow_map *mi_shadow;
@@ -71,6 +67,11 @@ static inline struct nilfs_mdt_info *NILFS_MDT(const struct inode *inode)
 	return inode->i_private;
 }
 
+static inline int nilfs_is_metadata_file_inode(const struct inode *inode)
+{
+	return inode->i_private != NULL;
+}
+
 /* Default GFP flags using highmem */
 #define NILFS_MDT_GFP      (__GFP_RECLAIM | __GFP_IO | __GFP_HIGHMEM)
 
@@ -83,11 +84,13 @@ int nilfs_mdt_find_block(struct inode *inode, unsigned long start,
 			 struct buffer_head **out_bh);
 int nilfs_mdt_delete_block(struct inode *, unsigned long);
 int nilfs_mdt_forget_block(struct inode *, unsigned long);
-int nilfs_mdt_mark_block_dirty(struct inode *, unsigned long);
 int nilfs_mdt_fetch_dirty(struct inode *);
 
 int nilfs_mdt_init(struct inode *inode, gfp_t gfp_mask, size_t objsz);
-void nilfs_mdt_set_entry_size(struct inode *, unsigned, unsigned);
+void nilfs_mdt_clear(struct inode *inode);
+void nilfs_mdt_destroy(struct inode *inode);
+
+void nilfs_mdt_set_entry_size(struct inode *, unsigned int, unsigned int);
 
 int nilfs_mdt_setup_shadow_map(struct inode *inode,
 			       struct nilfs_shadow_map *shadow);

fs/nilfs2/namei.c

@@ -13,12 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Modified for NILFS by Amagai Yoshiji <amagai@osrg.net>,
- *                       Ryusuke Konishi <ryusuke@osrg.net>
+ * Modified for NILFS by Amagai Yoshiji and Ryusuke Konishi.
  */
 /*
  *  linux/fs/ext2/namei.c
@@ -49,6 +44,7 @@
 static inline int nilfs_add_nondir(struct dentry *dentry, struct inode *inode)
 {
 	int err = nilfs_add_link(dentry, inode);
+
 	if (!err) {
 		d_instantiate(dentry, inode);
 		unlock_new_inode(inode);
@@ -143,7 +139,7 @@ static int nilfs_symlink(struct inode *dir, struct dentry *dentry,
 {
 	struct nilfs_transaction_info ti;
 	struct super_block *sb = dir->i_sb;
-	unsigned l = strlen(symname)+1;
+	unsigned int l = strlen(symname) + 1;
 	struct inode *inode;
 	int err;
 
@@ -288,7 +284,7 @@ static int nilfs_do_unlink(struct inode *dir, struct dentry *dentry)
 
 	if (!inode->i_nlink) {
 		nilfs_warning(inode->i_sb, __func__,
-			      "deleting nonexistent file (%lu), %d\n",
+			      "deleting nonexistent file (%lu), %d",
 			      inode->i_ino, inode->i_nlink);
 		set_nlink(inode, 1);
 	}

fs/nilfs2/nilfs.h

@@ -13,12 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>
- *            Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Koji Sato and Ryusuke Konishi.
  */
 
 #ifndef _NILFS_H
@@ -69,8 +64,10 @@ struct nilfs_inode_info {
 	 */
 	struct rw_semaphore xattr_sem;
 #endif
-	struct buffer_head *i_bh;	/* i_bh contains a new or dirty
-					   disk inode */
+	struct buffer_head *i_bh;	/*
+					 * i_bh contains a new or dirty
+					 * disk inode.
+					 */
 	struct nilfs_root *i_root;
 	struct inode vfs_inode;
 };
@@ -100,8 +97,10 @@ enum {
 	NILFS_I_NEW = 0,		/* Inode is newly created */
 	NILFS_I_DIRTY,			/* The file is dirty */
 	NILFS_I_QUEUED,			/* inode is in dirty_files list */
-	NILFS_I_BUSY,			/* inode is grabbed by a segment
-					   constructor */
+	NILFS_I_BUSY,			/*
+					 * Inode is grabbed by a segment
+					 * constructor
+					 */
 	NILFS_I_COLLECTED,		/* All dirty blocks are collected */
 	NILFS_I_UPDATED,		/* The file has been written back */
 	NILFS_I_INODE_SYNC,		/* dsync is not allowed for inode */
@@ -145,8 +144,10 @@ enum {
 struct nilfs_transaction_info {
 	u32			ti_magic;
 	void		       *ti_save;
-				/* This should never used. If this happens,
-				   one of other filesystems has a bug. */
+				/*
+				 * This should never be used.  If it happens,
+				 * one of other filesystems has a bug.
+				 */
 	unsigned short		ti_flags;
 	unsigned short		ti_count;
 };
@@ -156,8 +157,10 @@ struct nilfs_transaction_info {
 
 /* ti_flags */
 #define NILFS_TI_DYNAMIC_ALLOC	0x0001  /* Allocated from slab */
-#define NILFS_TI_SYNC		0x0002	/* Force to construct segment at the
-					   end of transaction. */
+#define NILFS_TI_SYNC		0x0002	/*
+					 * Force to construct segment at the
+					 * end of transaction.
+					 */
 #define NILFS_TI_GC		0x0004	/* GC context */
 #define NILFS_TI_COMMIT		0x0008	/* Change happened or not */
 #define NILFS_TI_WRITER		0x0010	/* Constructor context */
@@ -279,7 +282,7 @@ extern void nilfs_write_failed(struct address_space *mapping, loff_t to);
 int nilfs_permission(struct inode *inode, int mask);
 int nilfs_load_inode_block(struct inode *inode, struct buffer_head **pbh);
 extern int nilfs_inode_dirty(struct inode *);
-int nilfs_set_file_dirty(struct inode *inode, unsigned nr_dirty);
+int nilfs_set_file_dirty(struct inode *inode, unsigned int nr_dirty);
 extern int __nilfs_mark_inode_dirty(struct inode *, int);
 extern void nilfs_dirty_inode(struct inode *, int flags);
 int nilfs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,

fs/nilfs2/page.c

@@ -13,12 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>,
- *            Seiji Kihara <kihara@osrg.net>.
+ * Written by Ryusuke Konishi and Seiji Kihara.
  */
 
 #include <linux/pagemap.h>
@@ -440,12 +435,12 @@ void nilfs_clear_dirty_page(struct page *page, bool silent)
 	__nilfs_clear_page_dirty(page);
 }
 
-unsigned nilfs_page_count_clean_buffers(struct page *page,
-					unsigned from, unsigned to)
+unsigned int nilfs_page_count_clean_buffers(struct page *page,
+					    unsigned int from, unsigned int to)
 {
-	unsigned block_start, block_end;
+	unsigned int block_start, block_end;
 	struct buffer_head *bh, *head;
-	unsigned nc = 0;
+	unsigned int nc = 0;
 
 	for (bh = head = page_buffers(page), block_start = 0;
 	     bh != head || !block_start;

fs/nilfs2/page.h

@@ -13,12 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>,
- *            Seiji Kihara <kihara@osrg.net>.
+ * Written by Ryusuke Konishi and Seiji Kihara.
  */
 
 #ifndef _NILFS_PAGE_H
@@ -58,7 +53,8 @@ void nilfs_copy_back_pages(struct address_space *, struct address_space *);
 void nilfs_clear_dirty_page(struct page *, bool);
 void nilfs_clear_dirty_pages(struct address_space *, bool);
 void nilfs_mapping_init(struct address_space *mapping, struct inode *inode);
-unsigned nilfs_page_count_clean_buffers(struct page *, unsigned, unsigned);
+unsigned int nilfs_page_count_clean_buffers(struct page *, unsigned int,
+					    unsigned int);
 unsigned long nilfs_find_uncommitted_extent(struct inode *inode,
 					    sector_t start_blk,
 					    sector_t *blkoff);

fs/nilfs2/recovery.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  */
 
 #include <linux/buffer_head.h>
@@ -47,8 +43,10 @@ enum {
 
 /* work structure for recovery */
 struct nilfs_recovery_block {
-	ino_t ino;		/* Inode number of the file that this block
-				   belongs to */
+	ino_t ino;		/*
+				 * Inode number of the file that this block
+				 * belongs to
+				 */
 	sector_t blocknr;	/* block number */
 	__u64 vblocknr;		/* virtual block number */
 	unsigned long blkoff;	/* File offset of the data block (per block) */
@@ -156,7 +154,7 @@ int nilfs_read_super_root_block(struct the_nilfs *nilfs, sector_t sr_block,
 
 	sr = (struct nilfs_super_root *)bh_sr->b_data;
 	if (check) {
-		unsigned bytes = le16_to_cpu(sr->sr_bytes);
+		unsigned int bytes = le16_to_cpu(sr->sr_bytes);
 
 		if (bytes == 0 || bytes > nilfs->ns_blocksize) {
 			ret = NILFS_SEG_FAIL_CHECKSUM_SUPER_ROOT;
@@ -508,7 +506,7 @@ static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
 {
 	struct inode *inode;
 	struct nilfs_recovery_block *rb, *n;
-	unsigned blocksize = nilfs->ns_blocksize;
+	unsigned int blocksize = nilfs->ns_blocksize;
 	struct page *page;
 	loff_t pos;
 	int err = 0, err2 = 0;
@@ -526,6 +524,7 @@ static int nilfs_recover_dsync_blocks(struct the_nilfs *nilfs,
 					0, &page, nilfs_get_block);
 		if (unlikely(err)) {
 			loff_t isize = inode->i_size;
+
 			if (pos + blocksize > isize)
 				nilfs_write_failed(inode->i_mapping,
 							pos + blocksize);
@@ -872,9 +871,11 @@ int nilfs_search_super_root(struct the_nilfs *nilfs,
 
 		flags = le16_to_cpu(sum->ss_flags);
 		if (!(flags & NILFS_SS_SR) && !scan_newer) {
-			/* This will never happen because a superblock
-			   (last_segment) always points to a pseg
-			   having a super root. */
+			/*
+			 * This will never happen because a superblock
+			 * (last_segment) always points to a pseg with
+			 * a super root.
+			 */
 			ret = NILFS_SEG_FAIL_CONSISTENCY;
 			goto failed;
 		}

fs/nilfs2/segbuf.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  *
  */
 
@@ -133,7 +129,7 @@ int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *segbuf,
 	return 0;
 }
 
-int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned flags,
+int nilfs_segbuf_reset(struct nilfs_segment_buffer *segbuf, unsigned int flags,
 		       time_t ctime, __u64 cno)
 {
 	int err;
@@ -240,7 +236,7 @@ nilfs_segbuf_fill_in_super_root_crc(struct nilfs_segment_buffer *segbuf,
 {
 	struct nilfs_super_root *raw_sr;
 	struct the_nilfs *nilfs = segbuf->sb_super->s_fs_info;
-	unsigned srsize;
+	unsigned int srsize;
 	u32 crc;
 
 	raw_sr = (struct nilfs_super_root *)segbuf->sb_super_root->b_data;

fs/nilfs2/segbuf.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  *
  */
 #ifndef _NILFS_SEGBUF_H
@@ -82,7 +78,7 @@ struct nilfs_segment_buffer {
 	__u64			sb_nextnum;
 	sector_t		sb_fseg_start, sb_fseg_end;
 	sector_t		sb_pseg_start;
-	unsigned		sb_rest_blocks;
+	unsigned int		sb_rest_blocks;
 
 	/* Buffers */
 	struct list_head	sb_segsum_buffers;
@@ -124,7 +120,8 @@ void nilfs_segbuf_map_cont(struct nilfs_segment_buffer *segbuf,
 			   struct nilfs_segment_buffer *prev);
 void nilfs_segbuf_set_next_segnum(struct nilfs_segment_buffer *, __u64,
 				  struct the_nilfs *);
-int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned, time_t, __u64);
+int nilfs_segbuf_reset(struct nilfs_segment_buffer *, unsigned int, time_t,
+		       __u64);
 int nilfs_segbuf_extend_segsum(struct nilfs_segment_buffer *);
 int nilfs_segbuf_extend_payload(struct nilfs_segment_buffer *,
 				struct buffer_head **);

fs/nilfs2/segment.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  *
  */
 
@@ -49,18 +45,26 @@
  */
 #define SC_N_INODEVEC	16   /* Size of locally allocated inode vector */
 
-#define SC_MAX_SEGDELTA 64   /* Upper limit of the number of segments
-				appended in collection retry loop */
+#define SC_MAX_SEGDELTA 64   /*
+			      * Upper limit of the number of segments
+			      * appended in collection retry loop
+			      */
 
 /* Construction mode */
 enum {
 	SC_LSEG_SR = 1,	/* Make a logical segment having a super root */
-	SC_LSEG_DSYNC,	/* Flush data blocks of a given file and make
-			   a logical segment without a super root */
-	SC_FLUSH_FILE,	/* Flush data files, leads to segment writes without
-			   creating a checkpoint */
-	SC_FLUSH_DAT,	/* Flush DAT file. This also creates segments without
-			   a checkpoint */
+	SC_LSEG_DSYNC,	/*
+			 * Flush data blocks of a given file and make
+			 * a logical segment without a super root.
+			 */
+	SC_FLUSH_FILE,	/*
+			 * Flush data files, leads to segment writes without
+			 * creating a checkpoint.
+			 */
+	SC_FLUSH_DAT,	/*
+			 * Flush DAT file.  This also creates segments
+			 * without a checkpoint.
+			 */
 };
 
 /* Stage numbers of dirty block collection */
@@ -154,17 +158,15 @@ static int nilfs_prepare_segment_lock(struct nilfs_transaction_info *ti)
 	if (cur_ti) {
 		if (cur_ti->ti_magic == NILFS_TI_MAGIC)
 			return ++cur_ti->ti_count;
-		else {
-			/*
-			 * If journal_info field is occupied by other FS,
-			 * it is saved and will be restored on
-			 * nilfs_transaction_commit().
-			 */
-			printk(KERN_WARNING
-			       "NILFS warning: journal info from a different "
-			       "FS\n");
-			save = current->journal_info;
-		}
+
+		/*
+		 * If journal_info field is occupied by other FS,
+		 * it is saved and will be restored on
+		 * nilfs_transaction_commit().
+		 */
+		printk(KERN_WARNING
+		       "NILFS warning: journal info from a different FS\n");
+		save = current->journal_info;
 	}
 	if (!ti) {
 		ti = kmem_cache_alloc(nilfs_transaction_cachep, GFP_NOFS);
@@ -397,10 +399,10 @@ static void nilfs_transaction_unlock(struct super_block *sb)
 
 static void *nilfs_segctor_map_segsum_entry(struct nilfs_sc_info *sci,
 					    struct nilfs_segsum_pointer *ssp,
-					    unsigned bytes)
+					    unsigned int bytes)
 {
 	struct nilfs_segment_buffer *segbuf = sci->sc_curseg;
-	unsigned blocksize = sci->sc_super->s_blocksize;
+	unsigned int blocksize = sci->sc_super->s_blocksize;
 	void *p;
 
 	if (unlikely(ssp->offset + bytes > blocksize)) {
@@ -422,8 +424,8 @@ static int nilfs_segctor_reset_segment_buffer(struct nilfs_sc_info *sci)
 {
 	struct nilfs_segment_buffer *segbuf = sci->sc_curseg;
 	struct buffer_head *sumbh;
-	unsigned sumbytes;
-	unsigned flags = 0;
+	unsigned int sumbytes;
+	unsigned int flags = 0;
 	int err;
 
 	if (nilfs_doing_gc())
@@ -444,8 +446,10 @@ static int nilfs_segctor_feed_segment(struct nilfs_sc_info *sci)
 {
 	sci->sc_nblk_this_inc += sci->sc_curseg->sb_sum.nblocks;
 	if (NILFS_SEGBUF_IS_LAST(sci->sc_curseg, &sci->sc_segbufs))
-		return -E2BIG; /* The current segment is filled up
-				  (internal code) */
+		return -E2BIG; /*
+				* The current segment is filled up
+				* (internal code)
+				*/
 	sci->sc_curseg = NILFS_NEXT_SEGBUF(sci->sc_curseg);
 	return nilfs_segctor_reset_segment_buffer(sci);
 }
@@ -472,9 +476,9 @@ static int nilfs_segctor_add_super_root(struct nilfs_sc_info *sci)
  */
 static int nilfs_segctor_segsum_block_required(
 	struct nilfs_sc_info *sci, const struct nilfs_segsum_pointer *ssp,
-	unsigned binfo_size)
+	unsigned int binfo_size)
 {
-	unsigned blocksize = sci->sc_super->s_blocksize;
+	unsigned int blocksize = sci->sc_super->s_blocksize;
 	/* Size of finfo and binfo is enough small against blocksize */
 
 	return ssp->offset + binfo_size +
@@ -533,7 +537,7 @@ static void nilfs_segctor_end_finfo(struct nilfs_sc_info *sci,
 static int nilfs_segctor_add_file_block(struct nilfs_sc_info *sci,
 					struct buffer_head *bh,
 					struct inode *inode,
-					unsigned binfo_size)
+					unsigned int binfo_size)
 {
 	struct nilfs_segment_buffer *segbuf;
 	int required, err = 0;
@@ -617,7 +621,7 @@ static void nilfs_write_file_node_binfo(struct nilfs_sc_info *sci,
 	*vblocknr = binfo->bi_v.bi_vblocknr;
 }
 
-static struct nilfs_sc_operations nilfs_sc_file_ops = {
+static const struct nilfs_sc_operations nilfs_sc_file_ops = {
 	.collect_data = nilfs_collect_file_data,
 	.collect_node = nilfs_collect_file_node,
 	.collect_bmap = nilfs_collect_file_bmap,
@@ -666,7 +670,7 @@ static void nilfs_write_dat_node_binfo(struct nilfs_sc_info *sci,
 	*binfo_dat = binfo->bi_dat;
 }
 
-static struct nilfs_sc_operations nilfs_sc_dat_ops = {
+static const struct nilfs_sc_operations nilfs_sc_dat_ops = {
 	.collect_data = nilfs_collect_dat_data,
 	.collect_node = nilfs_collect_file_node,
 	.collect_bmap = nilfs_collect_dat_bmap,
@@ -674,7 +678,7 @@ static struct nilfs_sc_operations nilfs_sc_dat_ops = {
 	.write_node_binfo = nilfs_write_dat_node_binfo,
 };
 
-static struct nilfs_sc_operations nilfs_sc_dsync_ops = {
+static const struct nilfs_sc_operations nilfs_sc_dsync_ops = {
 	.collect_data = nilfs_collect_file_data,
 	.collect_node = NULL,
 	.collect_bmap = NULL,
@@ -777,7 +781,7 @@ static void nilfs_dispose_list(struct the_nilfs *nilfs,
 {
 	struct nilfs_inode_info *ii, *n;
 	struct nilfs_inode_info *ivec[SC_N_INODEVEC], **pii;
-	unsigned nv = 0;
+	unsigned int nv = 0;
 
 	while (!list_empty(head)) {
 		spin_lock(&nilfs->ns_inode_lock);
@@ -875,9 +879,11 @@ static int nilfs_segctor_create_checkpoint(struct nilfs_sc_info *sci)
 	err = nilfs_cpfile_get_checkpoint(nilfs->ns_cpfile, nilfs->ns_cno, 1,
 					  &raw_cp, &bh_cp);
 	if (likely(!err)) {
-		/* The following code is duplicated with cpfile.  But, it is
-		   needed to collect the checkpoint even if it was not newly
-		   created */
+		/*
+		 * The following code is duplicated with cpfile.  But, it is
+		 * needed to collect the checkpoint even if it was not newly
+		 * created.
+		 */
 		mark_buffer_dirty(bh_cp);
 		nilfs_mdt_mark_dirty(nilfs->ns_cpfile);
 		nilfs_cpfile_put_checkpoint(
@@ -958,7 +964,7 @@ static void nilfs_segctor_fill_in_super_root(struct nilfs_sc_info *sci,
 {
 	struct buffer_head *bh_sr;
 	struct nilfs_super_root *raw_sr;
-	unsigned isz, srsz;
+	unsigned int isz, srsz;
 
 	bh_sr = NILFS_LAST_SEGBUF(&sci->sc_segbufs)->sb_super_root;
 	raw_sr = (struct nilfs_super_root *)bh_sr->b_data;
@@ -1043,7 +1049,7 @@ static size_t nilfs_segctor_buffer_rest(struct nilfs_sc_info *sci)
 
 static int nilfs_segctor_scan_file(struct nilfs_sc_info *sci,
 				   struct inode *inode,
-				   struct nilfs_sc_operations *sc_ops)
+				   const struct nilfs_sc_operations *sc_ops)
 {
 	LIST_HEAD(data_buffers);
 	LIST_HEAD(node_buffers);
@@ -1406,8 +1412,10 @@ static void nilfs_free_incomplete_logs(struct list_head *logs,
 	if (atomic_read(&segbuf->sb_err)) {
 		/* Case 1: The first segment failed */
 		if (segbuf->sb_pseg_start != segbuf->sb_fseg_start)
-			/* Case 1a:  Partial segment appended into an existing
-			   segment */
+			/*
+			 * Case 1a:  Partial segment appended into an existing
+			 * segment
+			 */
 			nilfs_terminate_segment(nilfs, segbuf->sb_fseg_start,
 						segbuf->sb_fseg_end);
 		else /* Case 1b:  New full segment */
@@ -1550,7 +1558,7 @@ nilfs_segctor_update_payload_blocknr(struct nilfs_sc_info *sci,
 	sector_t blocknr;
 	unsigned long nfinfo = segbuf->sb_sum.nfinfo;
 	unsigned long nblocks = 0, ndatablk = 0;
-	struct nilfs_sc_operations *sc_op = NULL;
+	const struct nilfs_sc_operations *sc_op = NULL;
 	struct nilfs_segsum_pointer ssp;
 	struct nilfs_finfo *finfo = NULL;
 	union nilfs_binfo binfo;
@@ -1631,8 +1639,10 @@ static int nilfs_segctor_assign(struct nilfs_sc_info *sci, int mode)
 static void nilfs_begin_page_io(struct page *page)
 {
 	if (!page || PageWriteback(page))
-		/* For split b-tree node pages, this function may be called
-		   twice.  We ignore the 2nd or later calls by this check. */
+		/*
+		 * For split b-tree node pages, this function may be called
+		 * twice.  We ignore the 2nd or later calls by this check.
+		 */
 		return;
 
 	lock_page(page);
@@ -1942,7 +1952,7 @@ static int nilfs_segctor_collect_dirty_files(struct nilfs_sc_info *sci,
 				ifile, ii->vfs_inode.i_ino, &ibh);
 			if (unlikely(err)) {
 				nilfs_warning(sci->sc_super, __func__,
-					      "failed to get inode block.\n");
+					      "failed to get inode block.");
 				return err;
 			}
 			mark_buffer_dirty(ibh);
@@ -2395,6 +2405,7 @@ static int nilfs_segctor_construct(struct nilfs_sc_info *sci, int mode)
 static void nilfs_construction_timeout(unsigned long data)
 {
 	struct task_struct *p = (struct task_struct *)data;
+
 	wake_up_process(p);
 }
 
@@ -2555,10 +2566,10 @@ static int nilfs_segctor_thread(void *arg)
 
 		if (timeout || sci->sc_seq_request != sci->sc_seq_done)
 			mode = SC_LSEG_SR;
-		else if (!sci->sc_flush_request)
-			break;
-		else
+		else if (sci->sc_flush_request)
 			mode = nilfs_segctor_flush_mode(sci);
+		else
+			break;
 
 		spin_unlock(&sci->sc_state_lock);
 		nilfs_segctor_thread_construct(sci, mode);
@@ -2684,8 +2695,10 @@ static void nilfs_segctor_write_out(struct nilfs_sc_info *sci)
 {
 	int ret, retrycount = NILFS_SC_CLEANUP_RETRY;
 
-	/* The segctord thread was stopped and its timer was removed.
-	   But some tasks remain. */
+	/*
+	 * The segctord thread was stopped and its timer was removed.
+	 * But some tasks remain.
+	 */
 	do {
 		struct nilfs_transaction_info ti;
 
@@ -2727,13 +2740,13 @@ static void nilfs_segctor_destroy(struct nilfs_sc_info *sci)
 
 	if (!list_empty(&sci->sc_dirty_files)) {
 		nilfs_warning(sci->sc_super, __func__,
-			      "dirty file(s) after the final construction\n");
+			      "dirty file(s) after the final construction");
 		nilfs_dispose_list(nilfs, &sci->sc_dirty_files, 1);
 	}
 
 	if (!list_empty(&sci->sc_iput_queue)) {
 		nilfs_warning(sci->sc_super, __func__,
-			      "iput queue is not empty\n");
+			      "iput queue is not empty");
 		nilfs_dispose_list(nilfs, &sci->sc_iput_queue, 1);
 	}
 
@@ -2810,7 +2823,7 @@ void nilfs_detach_log_writer(struct super_block *sb)
 	if (!list_empty(&nilfs->ns_dirty_files)) {
 		list_splice_init(&nilfs->ns_dirty_files, &garbage_list);
 		nilfs_warning(sb, __func__,
-			      "Hit dirty file after stopped log writer\n");
+			      "Hit dirty file after stopped log writer");
 	}
 	spin_unlock(&nilfs->ns_inode_lock);
 	up_write(&nilfs->ns_segctor_sem);

fs/nilfs2/segment.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  *
  */
 #ifndef _NILFS_SEGMENT_H
@@ -75,7 +71,7 @@ struct nilfs_recovery_info {
  */
 struct nilfs_cstage {
 	int			scnt;
-	unsigned		flags;
+	unsigned int		flags;
 	struct nilfs_inode_info *dirty_file_ptr;
 	struct nilfs_inode_info *gc_inode_ptr;
 };
@@ -84,7 +80,7 @@ struct nilfs_segment_buffer;
 
 struct nilfs_segsum_pointer {
 	struct buffer_head     *bh;
-	unsigned		offset; /* offset in bytes */
+	unsigned int		offset; /* offset in bytes */
 };
 
 /**
@@ -193,11 +189,15 @@ enum {
 	NILFS_SC_DIRTY,		/* One or more dirty meta-data blocks exist */
 	NILFS_SC_UNCLOSED,	/* Logical segment is not closed */
 	NILFS_SC_SUPER_ROOT,	/* The latest segment has a super root */
-	NILFS_SC_PRIOR_FLUSH,	/* Requesting immediate flush without making a
-				   checkpoint */
-	NILFS_SC_HAVE_DELTA,	/* Next checkpoint will have update of files
-				   other than DAT, cpfile, sufile, or files
-				   moved by GC */
+	NILFS_SC_PRIOR_FLUSH,	/*
+				 * Requesting immediate flush without making a
+				 * checkpoint
+				 */
+	NILFS_SC_HAVE_DELTA,	/*
+				 * Next checkpoint will have update of files
+				 * other than DAT, cpfile, sufile, or files
+				 * moved by GC.
+				 */
 };
 
 /* sc_state */
@@ -207,17 +207,23 @@ enum {
 /*
  * Constant parameters
  */
-#define NILFS_SC_CLEANUP_RETRY	    3  /* Retry count of construction when
-					  destroying segctord */
+#define NILFS_SC_CLEANUP_RETRY	    3  /*
+					* Retry count of construction when
+					* destroying segctord
+					*/
 
 /*
  * Default values of timeout, in seconds.
  */
-#define NILFS_SC_DEFAULT_TIMEOUT    5   /* Timeout value of dirty blocks.
-					   It triggers construction of a
-					   logical segment with a super root */
-#define NILFS_SC_DEFAULT_SR_FREQ    30  /* Maximum frequency of super root
-					   creation */
+#define NILFS_SC_DEFAULT_TIMEOUT    5   /*
+					 * Timeout value of dirty blocks.
+					 * It triggers construction of a
+					 * logical segment with a super root.
+					 */
+#define NILFS_SC_DEFAULT_SR_FREQ    30  /*
+					 * Maximum frequency of super root
+					 * creation
+					 */
 
 /*
  * The default threshold amount of data, in block counts.

fs/nilfs2/sufile.c

@@ -13,12 +13,8 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
- * Revised by Ryusuke Konishi <ryusuke@osrg.net>.
+ * Written by Koji Sato.
+ * Revised by Ryusuke Konishi.
  */
 
 #include <linux/kernel.h>
@@ -61,6 +57,7 @@ static unsigned long
 nilfs_sufile_get_blkoff(const struct inode *sufile, __u64 segnum)
 {
 	__u64 t = segnum + NILFS_MDT(sufile)->mi_first_entry_offset;
+
 	do_div(t, nilfs_sufile_segment_usages_per_block(sufile));
 	return (unsigned long)t;
 }
@@ -69,6 +66,7 @@ static unsigned long
 nilfs_sufile_get_offset(const struct inode *sufile, __u64 segnum)
 {
 	__u64 t = segnum + NILFS_MDT(sufile)->mi_first_entry_offset;
+
 	return do_div(t, nilfs_sufile_segment_usages_per_block(sufile));
 }
 
@@ -819,7 +817,7 @@ out:
  * %-ENOMEM - Insufficient amount of memory available.
  */
 ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf,
-				unsigned sisz, size_t nsi)
+				unsigned int sisz, size_t nsi)
 {
 	struct buffer_head *su_bh;
 	struct nilfs_segment_usage *su;
@@ -897,7 +895,7 @@ ssize_t nilfs_sufile_get_suinfo(struct inode *sufile, __u64 segnum, void *buf,
  * %-EINVAL - Invalid values in input (segment number, flags or nblocks)
  */
 ssize_t nilfs_sufile_set_suinfo(struct inode *sufile, void *buf,
-				unsigned supsz, size_t nsup)
+				unsigned int supsz, size_t nsup)
 {
 	struct the_nilfs *nilfs = sufile->i_sb->s_fs_info;
 	struct buffer_head *header_bh, *bh;

fs/nilfs2/sufile.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>.
+ * Written by Koji Sato.
  */
 
 #ifndef _NILFS_SUFILE_H
@@ -42,9 +38,9 @@ int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum);
 int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
 				   unsigned long nblocks, time_t modtime);
 int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);
-ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned,
+ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned int,
 				size_t);
-ssize_t nilfs_sufile_set_suinfo(struct inode *, void *, unsigned , size_t);
+ssize_t nilfs_sufile_set_suinfo(struct inode *, void *, unsigned int, size_t);
 
 int nilfs_sufile_updatev(struct inode *, __u64 *, size_t, int, size_t *,
 			 void (*dofunc)(struct inode *, __u64,

fs/nilfs2/super.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  */
 /*
  *  linux/fs/ext2/super.c
@@ -173,12 +169,10 @@ struct inode *nilfs_alloc_inode(struct super_block *sb)
 static void nilfs_i_callback(struct rcu_head *head)
 {
 	struct inode *inode = container_of(head, struct inode, i_rcu);
-	struct nilfs_mdt_info *mdi = NILFS_MDT(inode);
 
-	if (mdi) {
-		kfree(mdi->mi_bgl); /* kfree(NULL) is safe */
-		kfree(mdi);
-	}
+	if (nilfs_is_metadata_file_inode(inode))
+		nilfs_mdt_destroy(inode);
+
 	kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode));
 }
 
@@ -279,7 +273,7 @@ struct nilfs_super_block **nilfs_prepare_super(struct super_block *sb,
 		}
 	} else if (sbp[1] &&
 		   sbp[1]->s_magic != cpu_to_le16(NILFS_SUPER_MAGIC)) {
-			memcpy(sbp[1], sbp[0], nilfs->ns_sbsize);
+		memcpy(sbp[1], sbp[0], nilfs->ns_sbsize);
 	}
 
 	if (flip && sbp[1])
@@ -749,6 +743,7 @@ static int parse_options(char *options, struct super_block *sb, int is_remount)
 
 	while ((p = strsep(&options, ",")) != NULL) {
 		int token;
+
 		if (!*p)
 			continue;
 
@@ -891,7 +886,7 @@ int nilfs_store_magic_and_option(struct super_block *sb,
 	nilfs->ns_interval = le32_to_cpu(sbp->s_c_interval);
 	nilfs->ns_watermark = le32_to_cpu(sbp->s_c_block_max);
 
-	return !parse_options(data, sb, 0) ? -EINVAL : 0 ;
+	return !parse_options(data, sb, 0) ? -EINVAL : 0;
 }
 
 int nilfs_check_feature_compatibility(struct super_block *sb,
@@ -1316,7 +1311,7 @@ nilfs_mount(struct file_system_type *fs_type, int flags,
 	}
 
 	if (!s->s_root) {
- 		s_new = true;
+		s_new = true;
 
 		/* New superblock instance created */
 		s->s_mode = mode;

fs/nilfs2/sysfs.c

@@ -68,7 +68,7 @@ static ssize_t nilfs_##name##_attr_store(struct kobject *kobj, \
 static const struct sysfs_ops nilfs_##name##_attr_ops = { \
 	.show	= nilfs_##name##_attr_show, \
 	.store	= nilfs_##name##_attr_store, \
-};
+}
 
 #define NILFS_DEV_INT_GROUP_TYPE(name, parent_name) \
 static void nilfs_##name##_attr_release(struct kobject *kobj) \
@@ -84,7 +84,7 @@ static struct kobj_type nilfs_##name##_ktype = { \
 	.default_attrs	= nilfs_##name##_attrs, \
 	.sysfs_ops	= &nilfs_##name##_attr_ops, \
 	.release	= nilfs_##name##_attr_release, \
-};
+}
 
 #define NILFS_DEV_INT_GROUP_FNS(name, parent_name) \
 static int nilfs_sysfs_create_##name##_group(struct the_nilfs *nilfs) \
@@ -756,7 +756,7 @@ nilfs_superblock_sb_write_count_show(struct nilfs_superblock_attr *attr,
 				      struct the_nilfs *nilfs,
 				      char *buf)
 {
-	unsigned sbwcount;
+	unsigned int sbwcount;
 
 	down_read(&nilfs->ns_sem);
 	sbwcount = nilfs->ns_sbwcount;
@@ -770,7 +770,7 @@ nilfs_superblock_sb_update_frequency_show(struct nilfs_superblock_attr *attr,
 					    struct the_nilfs *nilfs,
 					    char *buf)
 {
-	unsigned sb_update_freq;
+	unsigned int sb_update_freq;
 
 	down_read(&nilfs->ns_sem);
 	sb_update_freq = nilfs->ns_sb_update_freq;
@@ -784,7 +784,7 @@ nilfs_superblock_sb_update_frequency_store(struct nilfs_superblock_attr *attr,
 					    struct the_nilfs *nilfs,
 					    const char *buf, size_t count)
 {
-	unsigned val;
+	unsigned int val;
 	int err;
 
 	err = kstrtouint(skip_spaces(buf), 0, &val);

fs/nilfs2/sysfs.h

@@ -66,7 +66,7 @@ struct nilfs_##name##_attr { \
 			char *); \
 	ssize_t (*store)(struct kobject *, struct attribute *, \
 			 const char *, size_t); \
-};
+}
 
 NILFS_COMMON_ATTR_STRUCT(feature);
 
@@ -77,7 +77,7 @@ struct nilfs_##name##_attr { \
 			char *); \
 	ssize_t (*store)(struct nilfs_##name##_attr *, struct the_nilfs *, \
 			 const char *, size_t); \
-};
+}
 
 NILFS_DEV_ATTR_STRUCT(dev);
 NILFS_DEV_ATTR_STRUCT(segments);
@@ -93,7 +93,7 @@ struct nilfs_##name##_attr { \
 			char *); \
 	ssize_t (*store)(struct nilfs_##name##_attr *, struct nilfs_root *, \
 			 const char *, size_t); \
-};
+}
 
 NILFS_CP_ATTR_STRUCT(snapshot);
 

fs/nilfs2/the_nilfs.c

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  *
  */
 
@@ -112,8 +108,8 @@ static int nilfs_load_super_root(struct the_nilfs *nilfs,
 	struct nilfs_super_root *raw_sr;
 	struct nilfs_super_block **sbp = nilfs->ns_sbp;
 	struct nilfs_inode *rawi;
-	unsigned dat_entry_size, segment_usage_size, checkpoint_size;
-	unsigned inode_size;
+	unsigned int dat_entry_size, segment_usage_size, checkpoint_size;
+	unsigned int inode_size;
 	int err;
 
 	err = nilfs_read_super_root_block(nilfs, sr_block, &bh_sr, 1);
@@ -621,8 +617,10 @@ int init_nilfs(struct the_nilfs *nilfs, struct super_block *sb, char *data)
 		err = nilfs_load_super_block(nilfs, sb, blocksize, &sbp);
 		if (err)
 			goto out;
-			/* not failed_sbh; sbh is released automatically
-			   when reloading fails. */
+			/*
+			 * Not to failed_sbh; sbh is released automatically
+			 * when reloading fails.
+			 */
 	}
 	nilfs->ns_blocksize_bits = sb->s_blocksize_bits;
 	nilfs->ns_blocksize = blocksize;

fs/nilfs2/the_nilfs.h

@@ -13,11 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Ryusuke Konishi.
  *
  */
 
@@ -118,10 +114,10 @@ struct the_nilfs {
 	struct buffer_head     *ns_sbh[2];
 	struct nilfs_super_block *ns_sbp[2];
 	time_t			ns_sbwtime;
-	unsigned		ns_sbwcount;
-	unsigned		ns_sbsize;
-	unsigned		ns_mount_state;
-	unsigned		ns_sb_update_freq;
+	unsigned int		ns_sbwcount;
+	unsigned int		ns_sbsize;
+	unsigned int		ns_mount_state;
+	unsigned int		ns_sb_update_freq;
 
 	/*
 	 * Following fields are dedicated to a writable FS-instance.
@@ -226,15 +222,14 @@ THE_NILFS_FNS(SB_DIRTY, sb_dirty)
  * Mount option operations
  */
 #define nilfs_clear_opt(nilfs, opt)  \
-	do { (nilfs)->ns_mount_opt &= ~NILFS_MOUNT_##opt; } while (0)
+	((nilfs)->ns_mount_opt &= ~NILFS_MOUNT_##opt)
 #define nilfs_set_opt(nilfs, opt)  \
-	do { (nilfs)->ns_mount_opt |= NILFS_MOUNT_##opt; } while (0)
+	((nilfs)->ns_mount_opt |= NILFS_MOUNT_##opt)
 #define nilfs_test_opt(nilfs, opt) ((nilfs)->ns_mount_opt & NILFS_MOUNT_##opt)
 #define nilfs_write_opt(nilfs, mask, opt)				\
-	do { (nilfs)->ns_mount_opt =					\
+	((nilfs)->ns_mount_opt =					\
 		(((nilfs)->ns_mount_opt & ~NILFS_MOUNT_##mask) |	\
-		 NILFS_MOUNT_##opt);					\
-	} while (0)
+		 NILFS_MOUNT_##opt))					\
 
 /**
  * struct nilfs_root - nilfs root object
@@ -273,6 +268,7 @@ struct nilfs_root {
 static inline int nilfs_sb_need_update(struct the_nilfs *nilfs)
 {
 	u64 t = get_seconds();
+
 	return t < nilfs->ns_sbwtime ||
 		t > nilfs->ns_sbwtime + nilfs->ns_sb_update_freq;
 }
@@ -280,6 +276,7 @@ static inline int nilfs_sb_need_update(struct the_nilfs *nilfs)
 static inline int nilfs_sb_will_flip(struct the_nilfs *nilfs)
 {
 	int flip_bits = nilfs->ns_sbwcount & 0x0FL;
+
 	return (flip_bits != 0x08 && flip_bits != 0x0F);
 }
 
@@ -308,7 +305,7 @@ static inline void nilfs_get_root(struct nilfs_root *root)
 
 static inline int nilfs_valid_fs(struct the_nilfs *nilfs)
 {
-	unsigned valid_fs;
+	unsigned int valid_fs;
 
 	down_read(&nilfs->ns_sem);
 	valid_fs = (nilfs->ns_mount_state & NILFS_VALID_FS);

fs/proc/task_mmu.c

@@ -1027,11 +1027,15 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 		};
 
 		if (type == CLEAR_REFS_MM_HIWATER_RSS) {
+			if (down_write_killable(&mm->mmap_sem)) {
+				count = -EINTR;
+				goto out_mm;
+			}
+
 			/*
 			 * Writing 5 to /proc/pid/clear_refs resets the peak
 			 * resident set size to this mm's current rss value.
 			 */
-			down_write(&mm->mmap_sem);
 			reset_mm_hiwater_rss(mm);
 			up_write(&mm->mmap_sem);
 			goto out_mm;
@@ -1043,7 +1047,10 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 				if (!(vma->vm_flags & VM_SOFTDIRTY))
 					continue;
 				up_read(&mm->mmap_sem);
-				down_write(&mm->mmap_sem);
+				if (down_write_killable(&mm->mmap_sem)) {
+					count = -EINTR;
+					goto out_mm;
+				}
 				for (vma = mm->mmap; vma; vma = vma->vm_next) {
 					vma->vm_flags &= ~VM_SOFTDIRTY;
 					vma_set_page_prot(vma);

include/linux/kexec.h

@@ -230,8 +230,6 @@ extern void crash_kexec(struct pt_regs *);
 int kexec_should_crash(struct task_struct *);
 void crash_save_cpu(struct pt_regs *regs, int cpu);
 void crash_save_vmcoreinfo(void);
-void crash_map_reserved_pages(void);
-void crash_unmap_reserved_pages(void);
 void arch_crash_save_vmcoreinfo(void);
 __printf(1, 2)
 void vmcoreinfo_append_str(const char *fmt, ...);
@@ -317,6 +315,8 @@ int __weak arch_kexec_apply_relocations_add(const Elf_Ehdr *ehdr,
 					Elf_Shdr *sechdrs, unsigned int relsec);
 int __weak arch_kexec_apply_relocations(const Elf_Ehdr *ehdr, Elf_Shdr *sechdrs,
 					unsigned int relsec);
+void arch_kexec_protect_crashkres(void);
+void arch_kexec_unprotect_crashkres(void);
 
 #else /* !CONFIG_KEXEC_CORE */
 struct pt_regs;

include/linux/mm.h

@@ -2011,9 +2011,9 @@ static inline void mm_populate(unsigned long addr, unsigned long len) {}
 #endif
 
 /* These take the mm semaphore themselves */
-extern unsigned long vm_brk(unsigned long, unsigned long);
+extern unsigned long __must_check vm_brk(unsigned long, unsigned long);
 extern int vm_munmap(unsigned long, size_t);
-extern unsigned long vm_mmap(struct file *, unsigned long,
+extern unsigned long __must_check vm_mmap(struct file *, unsigned long,
         unsigned long, unsigned long,
         unsigned long, unsigned long);
 

include/linux/nilfs2_fs.h

@@ -13,12 +13,7 @@
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU Lesser General Public License for more details.
  *
- * You should have received a copy of the GNU Lesser General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- *
- * Written by Koji Sato <koji@osrg.net>
- *            Ryusuke Konishi <ryusuke@osrg.net>
+ * Written by Koji Sato and Ryusuke Konishi.
  */
 /*
  *  linux/include/linux/ext2_fs.h
@@ -132,10 +127,14 @@ struct nilfs_super_root {
 #define NILFS_MOUNT_ERRORS_RO		0x0020  /* Remount fs ro on errors */
 #define NILFS_MOUNT_ERRORS_PANIC	0x0040  /* Panic on errors */
 #define NILFS_MOUNT_BARRIER		0x1000  /* Use block barriers */
-#define NILFS_MOUNT_STRICT_ORDER	0x2000  /* Apply strict in-order
-						   semantics also for data */
-#define NILFS_MOUNT_NORECOVERY		0x4000  /* Disable write access during
-						   mount-time recovery */
+#define NILFS_MOUNT_STRICT_ORDER	0x2000  /*
+						 * Apply strict in-order
+						 * semantics also for data
+						 */
+#define NILFS_MOUNT_NORECOVERY		0x4000  /*
+						 * Disable write access during
+						 * mount-time recovery
+						 */
 #define NILFS_MOUNT_DISCARD		0x8000  /* Issue DISCARD requests */
 
 
@@ -147,16 +146,20 @@ struct nilfs_super_block {
 	__le16	s_minor_rev_level;	/* minor revision level */
 	__le16	s_magic;		/* Magic signature */
 
-	__le16  s_bytes;		/* Bytes count of CRC calculation
-					   for this structure. s_reserved
-					   is excluded. */
+	__le16  s_bytes;		/*
+					 * Bytes count of CRC calculation
+					 * for this structure. s_reserved
+					 * is excluded.
+					 */
 	__le16  s_flags;		/* flags */
 	__le32  s_crc_seed;		/* Seed value of CRC calculation */
 /*10*/	__le32	s_sum;			/* Check sum of super block */
 
-	__le32	s_log_block_size;	/* Block size represented as follows
-					   blocksize =
-					       1 << (s_log_block_size + 10) */
+	__le32	s_log_block_size;	/*
+					 * Block size represented as follows
+					 * blocksize =
+					 *     1 << (s_log_block_size + 10)
+					 */
 	__le64  s_nsegments;		/* Number of segments in filesystem */
 /*20*/	__le64  s_dev_size;		/* block device size in bytes */
 	__le64	s_first_data_block;	/* 1st seg disk block number */
@@ -168,8 +171,10 @@ struct nilfs_super_block {
 	__le64  s_last_seq;             /* seq. number of seg written last */
 /*50*/	__le64	s_free_blocks_count;	/* Free blocks count */
 
-	__le64	s_ctime;		/* Creation time (execution time of
-					   newfs) */
+	__le64	s_ctime;		/*
+					 * Creation time (execution time of
+					 * newfs)
+					 */
 /*60*/	__le64	s_mtime;		/* Mount time */
 	__le64	s_wtime;		/* Write time */
 /*70*/	__le16	s_mnt_count;		/* Mount count */
@@ -193,8 +198,10 @@ struct nilfs_super_block {
 /*A8*/	char	s_volume_name[80];	/* volume name */
 
 /*F8*/	__le32  s_c_interval;           /* Commit interval of segment */
-	__le32  s_c_block_max;          /* Threshold of data amount for
-					   the segment construction */
+	__le32  s_c_block_max;          /*
+					 * Threshold of data amount for
+					 * the segment construction
+					 */
 /*100*/	__le64  s_feature_compat;	/* Compatible feature set */
 	__le64  s_feature_compat_ro;	/* Read-only compatible feature set */
 	__le64  s_feature_incompat;	/* Incompatible feature set */
@@ -247,12 +254,18 @@ struct nilfs_super_block {
 
 #define NILFS_SB_OFFSET_BYTES	1024	/* byte offset of nilfs superblock */
 
-#define NILFS_SEG_MIN_BLOCKS	16	/* Minimum number of blocks in
-					   a full segment */
-#define NILFS_PSEG_MIN_BLOCKS	2	/* Minimum number of blocks in
-					   a partial segment */
-#define NILFS_MIN_NRSVSEGS	8	/* Minimum number of reserved
-					   segments */
+#define NILFS_SEG_MIN_BLOCKS	16	/*
+					 * Minimum number of blocks in
+					 * a full segment
+					 */
+#define NILFS_PSEG_MIN_BLOCKS	2	/*
+					 * Minimum number of blocks in
+					 * a partial segment
+					 */
+#define NILFS_MIN_NRSVSEGS	8	/*
+					 * Minimum number of reserved
+					 * segments
+					 */
 
 /*
  * We call DAT, cpfile, and sufile root metadata files.  Inodes of
@@ -327,9 +340,9 @@ enum {
 					~NILFS_DIR_ROUND)
 #define NILFS_MAX_REC_LEN		((1<<16)-1)
 
-static inline unsigned nilfs_rec_len_from_disk(__le16 dlen)
+static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
 {
-	unsigned len = le16_to_cpu(dlen);
+	unsigned int len = le16_to_cpu(dlen);
 
 #if !defined(__KERNEL__) || (PAGE_SIZE >= 65536)
 	if (len == NILFS_MAX_REC_LEN)
@@ -338,7 +351,7 @@ static inline unsigned nilfs_rec_len_from_disk(__le16 dlen)
 	return len;
 }
 
-static inline __le16 nilfs_rec_len_to_disk(unsigned len)
+static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
 {
 #if !defined(__KERNEL__) || (PAGE_SIZE >= 65536)
 	if (len == (1 << 16))
@@ -518,9 +531,11 @@ struct nilfs_checkpoint {
 	__le64 cp_inodes_count;
 	__le64 cp_blocks_count;
 
-	/* Do not change the byte offset of ifile inode.
-	   To keep the compatibility of the disk format,
-	   additional fields should be added behind cp_ifile_inode. */
+	/*
+	 * Do not change the byte offset of ifile inode.
+	 * To keep the compatibility of the disk format,
+	 * additional fields should be added behind cp_ifile_inode.
+	 */
 	struct nilfs_inode cp_ifile_inode;
 };
 

include/linux/oom.h

@@ -50,24 +50,21 @@ enum oom_scan_t {
 	OOM_SCAN_SELECT,	/* always select this thread first */
 };
 
-/* Thread is the potential origin of an oom condition; kill first on oom */
-#define OOM_FLAG_ORIGIN		((__force oom_flags_t)0x1)
-
 extern struct mutex oom_lock;
 
 static inline void set_current_oom_origin(void)
 {
-	current->signal->oom_flags |= OOM_FLAG_ORIGIN;
+	current->signal->oom_flag_origin = true;
 }
 
 static inline void clear_current_oom_origin(void)
 {
-	current->signal->oom_flags &= ~OOM_FLAG_ORIGIN;
+	current->signal->oom_flag_origin = false;
 }
 
 static inline bool oom_task_origin(const struct task_struct *p)
 {
-	return !!(p->signal->oom_flags & OOM_FLAG_ORIGIN);
+	return p->signal->oom_flag_origin;
 }
 
 extern void mark_oom_victim(struct task_struct *tsk);

include/linux/sched.h

@@ -794,7 +794,11 @@ struct signal_struct {
 	struct tty_audit_buf *tty_audit_buf;
 #endif
 
-	oom_flags_t oom_flags;
+	/*
+	 * Thread is the potential origin of an oom condition; kill first on
+	 * oom
+	 */
+	bool oom_flag_origin;
 	short oom_score_adj;		/* OOM kill score adjustment */
 	short oom_score_adj_min;	/* OOM kill score adjustment min value.
 					 * Only settable by CAP_SYS_RESOURCE. */

include/linux/signal.h

@@ -400,7 +400,9 @@ int unhandled_signal(struct task_struct *tsk, int sig);
 #else
 #define rt_sigmask(sig)	sigmask(sig)
 #endif
-#define siginmask(sig, mask) (rt_sigmask(sig) & (mask))
+
+#define siginmask(sig, mask) \
+	((sig) < SIGRTMIN && (rt_sigmask(sig) & (mask)))
 
 #define SIG_KERNEL_ONLY_MASK (\
 	rt_sigmask(SIGKILL)   |  rt_sigmask(SIGSTOP))
@@ -421,14 +423,10 @@ int unhandled_signal(struct task_struct *tsk, int sig);
         rt_sigmask(SIGCONT)   |  rt_sigmask(SIGCHLD)   | \
 	rt_sigmask(SIGWINCH)  |  rt_sigmask(SIGURG)    )
 
-#define sig_kernel_only(sig) \
-	(((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_ONLY_MASK))
-#define sig_kernel_coredump(sig) \
-	(((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_COREDUMP_MASK))
-#define sig_kernel_ignore(sig) \
-	(((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_IGNORE_MASK))
-#define sig_kernel_stop(sig) \
-	(((sig) < SIGRTMIN) && siginmask(sig, SIG_KERNEL_STOP_MASK))
+#define sig_kernel_only(sig)		siginmask(sig, SIG_KERNEL_ONLY_MASK)
+#define sig_kernel_coredump(sig)	siginmask(sig, SIG_KERNEL_COREDUMP_MASK)
+#define sig_kernel_ignore(sig)		siginmask(sig, SIG_KERNEL_IGNORE_MASK)
+#define sig_kernel_stop(sig)		siginmask(sig, SIG_KERNEL_STOP_MASK)
 
 #define sig_user_defined(t, signr) \
 	(((t)->sighand->action[(signr)-1].sa.sa_handler != SIG_DFL) &&	\

include/linux/types.h

@@ -156,7 +156,6 @@ typedef u32 dma_addr_t;
 
 typedef unsigned __bitwise__ gfp_t;
 typedef unsigned __bitwise__ fmode_t;
-typedef unsigned __bitwise__ oom_flags_t;
 
 #ifdef CONFIG_PHYS_ADDR_T_64BIT
 typedef u64 phys_addr_t;

ipc/shm.c

@@ -1200,7 +1200,11 @@ long do_shmat(int shmid, char __user *shmaddr, int shmflg, ulong *raddr,
 	if (err)
 		goto out_fput;
 
-	down_write(&current->mm->mmap_sem);
+	if (down_write_killable(&current->mm->mmap_sem)) {
+		err = -EINTR;
+		goto out_fput;
+	}
+
 	if (addr && !(shmflg & SHM_REMAP)) {
 		err = -EINVAL;
 		if (addr + size < addr)
@@ -1271,7 +1275,8 @@ SYSCALL_DEFINE1(shmdt, char __user *, shmaddr)
 	if (addr & ~PAGE_MASK)
 		return retval;
 
-	down_write(&mm->mmap_sem);
+	if (down_write_killable(&mm->mmap_sem))
+		return -EINTR;
 
 	/*
 	 * This function tries to be smart and unmap shm segments that