x86/fpu: Fix header file dependencies of fpu-internal.h

Fix a minor header file dependency bug in asm/fpu-internal.h: it
relies on i387.h but does not include it. All users of fpu-internal.h
included it explicitly.

Also remove unnecessary includes, to reduce compilation time.

This also makes it easier to use it as a standalone header file
for FPU internals, such as an upcoming C module in arch/x86/kernel/fpu/.

Reviewed-by: Borislav Petkov <bp@alien8.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/crypto/crc32c-intel_glue.c

@@ -32,7 +32,6 @@
 
 #include <asm/cpufeature.h>
 #include <asm/cpu_device_id.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 
 #define CHKSUM_BLOCK_SIZE	1

arch/x86/crypto/sha-mb/sha1_mb.c

@@ -65,7 +65,6 @@
 #include <crypto/mcryptd.h>
 #include <crypto/crypto_wq.h>
 #include <asm/byteorder.h>
-#include <asm/i387.h>
 #include <asm/xcr.h>
 #include <asm/xsave.h>
 #include <linux/hardirq.h>

arch/x86/ia32/ia32_signal.c

@@ -21,7 +21,6 @@
 #include <linux/binfmts.h>
 #include <asm/ucontext.h>
 #include <asm/uaccess.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/ptrace.h>
 #include <asm/ia32_unistd.h>

arch/x86/include/asm/fpu-internal.h

@@ -10,18 +10,13 @@
 #ifndef _FPU_INTERNAL_H
 #define _FPU_INTERNAL_H
 
-#include <linux/kernel_stat.h>
 #include <linux/regset.h>
 #include <linux/compat.h>
 #include <linux/slab.h>
-#include <asm/asm.h>
-#include <asm/cpufeature.h>
-#include <asm/processor.h>
-#include <asm/sigcontext.h>
+
 #include <asm/user.h>
-#include <asm/uaccess.h>
+#include <asm/i387.h>
 #include <asm/xsave.h>
-#include <asm/smap.h>
 
 #ifdef CONFIG_X86_64
 # include <asm/sigcontext32.h>

arch/x86/kernel/cpu/common.c

@@ -31,7 +31,6 @@
 #include <asm/setup.h>
 #include <asm/apic.h>
 #include <asm/desc.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/mtrr.h>
 #include <linux/numa.h>

arch/x86/kernel/process.c

@@ -25,7 +25,6 @@
 #include <asm/idle.h>
 #include <asm/uaccess.h>
 #include <asm/mwait.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/debugreg.h>
 #include <asm/nmi.h>

arch/x86/kernel/process_32.c

@@ -39,7 +39,6 @@
 #include <asm/pgtable.h>
 #include <asm/ldt.h>
 #include <asm/processor.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/desc.h>
 #ifdef CONFIG_MATH_EMULATION

arch/x86/kernel/process_64.c

@@ -38,7 +38,6 @@
 
 #include <asm/pgtable.h>
 #include <asm/processor.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/mmu_context.h>
 #include <asm/prctl.h>

arch/x86/kernel/ptrace.c

@@ -28,7 +28,6 @@
 #include <asm/uaccess.h>
 #include <asm/pgtable.h>
 #include <asm/processor.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/debugreg.h>
 #include <asm/ldt.h>

arch/x86/kernel/signal.c

@@ -26,7 +26,6 @@
 
 #include <asm/processor.h>
 #include <asm/ucontext.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/vdso.h>
 #include <asm/mce.h>

arch/x86/kernel/smpboot.c

@@ -68,7 +68,6 @@
 #include <asm/mwait.h>
 #include <asm/apic.h>
 #include <asm/io_apic.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/setup.h>
 #include <asm/uv/uv.h>

arch/x86/kernel/traps.c

@@ -54,7 +54,6 @@
 #include <asm/ftrace.h>
 #include <asm/traps.h>
 #include <asm/desc.h>
-#include <asm/i387.h>
 #include <asm/fpu-internal.h>
 #include <asm/mce.h>
 #include <asm/fixmap.h>

arch/x86/kvm/x86.c

@@ -59,7 +59,7 @@
 #include <asm/desc.h>
 #include <asm/mtrr.h>
 #include <asm/mce.h>
-#include <asm/i387.h>
+#include <linux/kernel_stat.h>
 #include <asm/fpu-internal.h> /* Ugh! */
 #include <asm/xcr.h>
 #include <asm/pvclock.h>

arch/x86/mm/mpx.c

@@ -10,7 +10,6 @@
 #include <linux/syscalls.h>
 #include <linux/sched/sysctl.h>
 
-#include <asm/i387.h>
 #include <asm/insn.h>
 #include <asm/mman.h>
 #include <asm/mmu_context.h>