sparc: switch to RAW_COPY_USER

... and drop zeroing in sparc32.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

arch/sparc/Kconfig

@@ -45,6 +45,7 @@ config SPARC
 	select HAVE_ARCH_HARDENED_USERCOPY
 	select PROVE_LOCKING_SMALL if PROVE_LOCKING
 	select ARCH_WANT_RELAX_ORDER
+	select ARCH_HAS_RAW_COPY_USER
 
 config SPARC32
 	def_bool !64BIT

arch/sparc/include/asm/uaccess_32.h

@@ -235,39 +235,18 @@ int __get_user_bad(void);
 
 unsigned long __copy_user(void __user *to, const void __user *from, unsigned long size);
 
-static inline unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
+static inline unsigned long raw_copy_to_user(void __user *to, const void *from, unsigned long n)
 {
-	if (n && __access_ok((unsigned long) to, n)) {
-		check_object_size(from, n, true);
-		return __copy_user(to, (__force void __user *) from, n);
-	} else
-		return n;
-}
-
-static inline unsigned long __copy_to_user(void __user *to, const void *from, unsigned long n)
-{
-	check_object_size(from, n, true);
 	return __copy_user(to, (__force void __user *) from, n);
 }
 
-static inline unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
-{
-	if (n && __access_ok((unsigned long) from, n)) {
-		check_object_size(to, n, false);
-		return __copy_user((__force void __user *) to, from, n);
-	} else {
-		memset(to, 0, n);
-		return n;
-	}
-}
-
-static inline unsigned long __copy_from_user(void *to, const void __user *from, unsigned long n)
+static inline unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n)
 {
 	return __copy_user((__force void __user *) to, from, n);
 }
 
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
 
 static inline unsigned long __clear_user(void __user *addr, unsigned long size)
 {

arch/sparc/include/asm/uaccess_64.h

@@ -176,39 +176,19 @@ __asm__ __volatile__(							\
 
 int __get_user_bad(void);
 
-unsigned long __must_check ___copy_from_user(void *to,
+unsigned long __must_check raw_copy_from_user(void *to,
 					     const void __user *from,
 					     unsigned long size);
-static inline unsigned long __must_check
-copy_from_user(void *to, const void __user *from, unsigned long size)
-{
-	check_object_size(to, size, false);
-
-	return ___copy_from_user(to, from, size);
-}
-#define __copy_from_user copy_from_user
 
-unsigned long __must_check ___copy_to_user(void __user *to,
+unsigned long __must_check raw_copy_to_user(void __user *to,
 					   const void *from,
 					   unsigned long size);
-static inline unsigned long __must_check
-copy_to_user(void __user *to, const void *from, unsigned long size)
-{
-	check_object_size(from, size, true);
+#define INLINE_COPY_FROM_USER
+#define INLINE_COPY_TO_USER
 
-	return ___copy_to_user(to, from, size);
-}
-#define __copy_to_user copy_to_user
-
-unsigned long __must_check ___copy_in_user(void __user *to,
+unsigned long __must_check raw_copy_in_user(void __user *to,
 					   const void __user *from,
 					   unsigned long size);
-static inline unsigned long __must_check
-copy_in_user(void __user *to, void __user *from, unsigned long size)
-{
-	return ___copy_in_user(to, from, size);
-}
-#define __copy_in_user copy_in_user
 
 unsigned long __must_check __clear_user(void __user *, unsigned long);
 
@@ -217,9 +197,6 @@ unsigned long __must_check __clear_user(void __user *, unsigned long);
 __must_check long strlen_user(const char __user *str);
 __must_check long strnlen_user(const char __user *str, long n);
 
-#define __copy_to_user_inatomic __copy_to_user
-#define __copy_from_user_inatomic __copy_from_user
-
 struct pt_regs;
 unsigned long compute_effective_address(struct pt_regs *,
 					unsigned int insn,

arch/sparc/lib/GENcopy_from_user.S

@@ -23,7 +23,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop
 #endif
 

arch/sparc/lib/GENcopy_to_user.S

@@ -27,7 +27,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop
 #endif
 

arch/sparc/lib/GENpatch.S

@@ -26,8 +26,8 @@
 	.type	generic_patch_copyops,#function
 generic_patch_copyops:
 	GEN_DO_PATCH(memcpy, GENmemcpy)
-	GEN_DO_PATCH(___copy_from_user, GENcopy_from_user)
-	GEN_DO_PATCH(___copy_to_user, GENcopy_to_user)
+	GEN_DO_PATCH(raw_copy_from_user, GENcopy_from_user)
+	GEN_DO_PATCH(raw_copy_to_user, GENcopy_to_user)
 	retl
 	 nop
 	.size	generic_patch_copyops,.-generic_patch_copyops

arch/sparc/lib/NG2copy_from_user.S

@@ -36,7 +36,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop
 #endif
 

arch/sparc/lib/NG2copy_to_user.S

@@ -45,7 +45,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop
 #endif
 

arch/sparc/lib/NG2patch.S

@@ -26,8 +26,8 @@
 	.type	niagara2_patch_copyops,#function
 niagara2_patch_copyops:
 	NG_DO_PATCH(memcpy, NG2memcpy)
-	NG_DO_PATCH(___copy_from_user, NG2copy_from_user)
-	NG_DO_PATCH(___copy_to_user, NG2copy_to_user)
+	NG_DO_PATCH(raw_copy_from_user, NG2copy_from_user)
+	NG_DO_PATCH(raw_copy_to_user, NG2copy_to_user)
 	retl
 	 nop
 	.size	niagara2_patch_copyops,.-niagara2_patch_copyops

arch/sparc/lib/NG4copy_from_user.S

@@ -31,7 +31,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop
 #endif
 

arch/sparc/lib/NG4copy_to_user.S

@@ -40,7 +40,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop
 #endif
 

arch/sparc/lib/NG4patch.S

@@ -26,8 +26,8 @@
 	.type	niagara4_patch_copyops,#function
 niagara4_patch_copyops:
 	NG_DO_PATCH(memcpy, NG4memcpy)
-	NG_DO_PATCH(___copy_from_user, NG4copy_from_user)
-	NG_DO_PATCH(___copy_to_user, NG4copy_to_user)
+	NG_DO_PATCH(raw_copy_from_user, NG4copy_from_user)
+	NG_DO_PATCH(raw_copy_to_user, NG4copy_to_user)
 	retl
 	 nop
 	.size	niagara4_patch_copyops,.-niagara4_patch_copyops

arch/sparc/lib/NGcopy_from_user.S

@@ -25,7 +25,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop
 #endif
 

arch/sparc/lib/NGcopy_to_user.S

@@ -28,7 +28,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop
 #endif
 

arch/sparc/lib/NGpatch.S

@@ -26,8 +26,8 @@
 	.type	niagara_patch_copyops,#function
 niagara_patch_copyops:
 	NG_DO_PATCH(memcpy, NGmemcpy)
-	NG_DO_PATCH(___copy_from_user, NGcopy_from_user)
-	NG_DO_PATCH(___copy_to_user, NGcopy_to_user)
+	NG_DO_PATCH(raw_copy_from_user, NGcopy_from_user)
+	NG_DO_PATCH(raw_copy_to_user, NGcopy_to_user)
 	retl
 	 nop
 	.size	niagara_patch_copyops,.-niagara_patch_copyops

arch/sparc/lib/U1copy_from_user.S

@@ -19,7 +19,7 @@
 	.text;			\
 	.align 4;
 
-#define FUNC_NAME		___copy_from_user
+#define FUNC_NAME		raw_copy_from_user
 #define LOAD(type,addr,dest)	type##a [addr] %asi, dest
 #define LOAD_BLK(addr,dest)	ldda [addr] ASI_BLK_AIUS, dest
 #define EX_RETVAL(x)		0
@@ -31,7 +31,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop;						\
 
 #include "U1memcpy.S"

arch/sparc/lib/U1copy_to_user.S

@@ -19,7 +19,7 @@
 	.text;			\
 	.align 4;
 
-#define FUNC_NAME		___copy_to_user
+#define FUNC_NAME		raw_copy_to_user
 #define STORE(type,src,addr)	type##a src, [addr] ASI_AIUS
 #define STORE_BLK(src,addr)	stda src, [addr] ASI_BLK_AIUS
 #define EX_RETVAL(x)		0
@@ -31,7 +31,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop;						\
 
 #include "U1memcpy.S"

arch/sparc/lib/U3copy_to_user.S

@@ -31,7 +31,7 @@
 #define PREAMBLE					\
 	rd		%asi, %g1;			\
 	cmp		%g1, ASI_AIUS;			\
-	bne,pn		%icc, ___copy_in_user;		\
+	bne,pn		%icc, raw_copy_in_user;		\
 	 nop;						\
 
 #include "U3memcpy.S"

arch/sparc/lib/U3patch.S

@@ -26,8 +26,8 @@
 	.type	cheetah_patch_copyops,#function
 cheetah_patch_copyops:
 	ULTRA3_DO_PATCH(memcpy, U3memcpy)
-	ULTRA3_DO_PATCH(___copy_from_user, U3copy_from_user)
-	ULTRA3_DO_PATCH(___copy_to_user, U3copy_to_user)
+	ULTRA3_DO_PATCH(raw_copy_from_user, U3copy_from_user)
+	ULTRA3_DO_PATCH(raw_copy_to_user, U3copy_to_user)
 	retl
 	 nop
 	.size	cheetah_patch_copyops,.-cheetah_patch_copyops

arch/sparc/lib/copy_in_user.S

@@ -44,7 +44,7 @@ __retl_o2_plus_1:
 	 * to copy register windows around during thread cloning.
 	 */
 
-ENTRY(___copy_in_user)	/* %o0=dst, %o1=src, %o2=len */
+ENTRY(raw_copy_in_user)	/* %o0=dst, %o1=src, %o2=len */
 	cmp		%o2, 0
 	be,pn		%XCC, 85f
 	 or		%o0, %o1, %o3
@@ -105,5 +105,5 @@ ENTRY(___copy_in_user)	/* %o0=dst, %o1=src, %o2=len */
 	 add		%o0, 1, %o0
 	retl
 	 clr		%o0
-ENDPROC(___copy_in_user)
-EXPORT_SYMBOL(___copy_in_user)
+ENDPROC(raw_copy_in_user)
+EXPORT_SYMBOL(raw_copy_in_user)

arch/sparc/lib/copy_user.S

@@ -364,21 +364,7 @@ short_aligned_end:
 97:
 	mov	%o2, %g3
 fixupretl:
-	sethi   %hi(PAGE_OFFSET), %g1
-	cmp	%o0, %g1
-	blu	1f
-	 cmp	%o1, %g1
-	bgeu	1f
-	 ld	[%g6 + TI_PREEMPT], %g1
-	cmp	%g1, 0
-	bne	1f
-	 nop
-	save	%sp, -64, %sp
-	mov	%i0, %o0
-	call	__bzero
-	 mov	%g3, %o1
-	restore
-1:	retl
+	retl
 	 mov	%g3, %o0
 
 /* exception routine sets %g2 to (broken_insn - first_insn)>>2 */