Merge tag 'uaccess_for_upstream' of...

Merge tag 'uaccess_for_upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost into asm-generic

Merge "uaccess: fix sparse warning on get/put_user for bitwise types" from Michael S. Tsirkin:

At the moment, if p and x are both tagged as bitwise types,
some of get_user(x, p), put_user(x, p), __get_user(x, p), __put_user(x, p)
might produce a sparse warning on many architectures.
This is a false positive: *p on these architectures is loaded into long
(typically using asm), then cast back to typeof(*p).

When typeof(*p) is a bitwise type (which is uncommon), such a cast needs
__force, otherwise sparse produces a warning.

Some architectures already have the __force tag, add it
where it's missing.

I verified that adding these __force casts does not supress any useful warnings.

Specifically, vhost wants to read/write bitwise types in userspace memory
using get_user/put_user.
At the moment this triggers sparse errors, since the value is passed through an
integer.

For example:
    __le32 __user *p;
    __u32 x;

both
    put_user(x, p);
and
    get_user(x, p);
should be safe, but produce warnings on some architectures.

While there, I noticed that a bunch of architectures violated
coding style rules within uaccess macros.
Included patches to fix them up.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

* tag 'uaccess_for_upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (37 commits)
  sparc32: nocheck uaccess coding style tweaks
  sparc64: nocheck uaccess coding style tweaks
  xtensa: macro whitespace fixes
  sh: macro whitespace fixes
  parisc: macro whitespace fixes
  m68k: macro whitespace fixes
  m32r: macro whitespace fixes
  frv: macro whitespace fixes
  cris: macro whitespace fixes
  avr32: macro whitespace fixes
  arm64: macro whitespace fixes
  arm: macro whitespace fixes
  alpha: macro whitespace fixes
  blackfin: macro whitespace fixes
  sparc64: uaccess_64 macro whitespace fixes
  sparc32: uaccess_32 macro whitespace fixes
  avr32: whitespace fix
  sh: fix put_user sparse errors
  metag: fix put_user sparse errors
  ia64: fix put_user sparse errors
  ...

arch/alpha/include/asm/uaccess.h

@@ -27,7 +27,7 @@
 #define get_ds()  (KERNEL_DS)
 #define set_fs(x) (current_thread_info()->addr_limit = (x))
 
-#define segment_eq(a,b)	((a).seg == (b).seg)
+#define segment_eq(a, b)	((a).seg == (b).seg)
 
 /*
  * Is a address valid? This does a straightforward calculation rather
@@ -39,13 +39,13 @@
  *  - AND "addr+size" doesn't have any high-bits set
  *  - OR we are in kernel mode.
  */
-#define __access_ok(addr,size,segment) \
+#define __access_ok(addr, size, segment) \
 	(((segment).seg & (addr | size | (addr+size))) == 0)
 
-#define access_ok(type,addr,size)				\
+#define access_ok(type, addr, size)				\
 ({								\
 	__chk_user_ptr(addr);					\
-	__access_ok(((unsigned long)(addr)),(size),get_fs());	\
+	__access_ok(((unsigned long)(addr)), (size), get_fs());	\
 })
 
 /*
@@ -60,20 +60,20 @@
  * (a) re-use the arguments for side effects (sizeof/typeof is ok)
  * (b) require any knowledge of processes at this stage
  */
-#define put_user(x,ptr) \
-  __put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)),get_fs())
-#define get_user(x,ptr) \
-  __get_user_check((x),(ptr),sizeof(*(ptr)),get_fs())
+#define put_user(x, ptr) \
+  __put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)), get_fs())
+#define get_user(x, ptr) \
+  __get_user_check((x), (ptr), sizeof(*(ptr)), get_fs())
 
 /*
  * The "__xxx" versions do not do address space checking, useful when
  * doing multiple accesses to the same area (the programmer has to do the
  * checks by hand with "access_ok()")
  */
-#define __put_user(x,ptr) \
-  __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
-#define __get_user(x,ptr) \
-  __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __put_user(x, ptr) \
+  __put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
+#define __get_user(x, ptr) \
+  __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
   
 /*
  * The "lda %1, 2b-1b(%0)" bits are magic to get the assembler to
@@ -84,7 +84,7 @@
 
 extern void __get_user_unknown(void);
 
-#define __get_user_nocheck(x,ptr,size)				\
+#define __get_user_nocheck(x, ptr, size)			\
 ({								\
 	long __gu_err = 0;					\
 	unsigned long __gu_val;					\
@@ -96,16 +96,16 @@ extern void __get_user_unknown(void);
 	  case 8: __get_user_64(ptr); break;			\
 	  default: __get_user_unknown(); break;			\
 	}							\
-	(x) = (__typeof__(*(ptr))) __gu_val;			\
+	(x) = (__force __typeof__(*(ptr))) __gu_val;		\
 	__gu_err;						\
 })
 
-#define __get_user_check(x,ptr,size,segment)				\
+#define __get_user_check(x, ptr, size, segment)				\
 ({									\
 	long __gu_err = -EFAULT;					\
 	unsigned long __gu_val = 0;					\
 	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
-	if (__access_ok((unsigned long)__gu_addr,size,segment)) {	\
+	if (__access_ok((unsigned long)__gu_addr, size, segment)) {	\
 		__gu_err = 0;						\
 		switch (size) {						\
 		  case 1: __get_user_8(__gu_addr); break;		\
@@ -115,7 +115,7 @@ extern void __get_user_unknown(void);
 		  default: __get_user_unknown(); break;			\
 		}							\
 	}								\
-	(x) = (__typeof__(*(ptr))) __gu_val;				\
+	(x) = (__force __typeof__(*(ptr))) __gu_val;			\
 	__gu_err;							\
 })
 
@@ -201,31 +201,31 @@ struct __large_struct { unsigned long buf[100]; };
 
 extern void __put_user_unknown(void);
 
-#define __put_user_nocheck(x,ptr,size)				\
+#define __put_user_nocheck(x, ptr, size)			\
 ({								\
 	long __pu_err = 0;					\
 	__chk_user_ptr(ptr);					\
 	switch (size) {						\
-	  case 1: __put_user_8(x,ptr); break;			\
-	  case 2: __put_user_16(x,ptr); break;			\
-	  case 4: __put_user_32(x,ptr); break;			\
-	  case 8: __put_user_64(x,ptr); break;			\
+	  case 1: __put_user_8(x, ptr); break;			\
+	  case 2: __put_user_16(x, ptr); break;			\
+	  case 4: __put_user_32(x, ptr); break;			\
+	  case 8: __put_user_64(x, ptr); break;			\
 	  default: __put_user_unknown(); break;			\
 	}							\
 	__pu_err;						\
 })
 
-#define __put_user_check(x,ptr,size,segment)				\
+#define __put_user_check(x, ptr, size, segment)				\
 ({									\
 	long __pu_err = -EFAULT;					\
 	__typeof__(*(ptr)) __user *__pu_addr = (ptr);			\
-	if (__access_ok((unsigned long)__pu_addr,size,segment)) {	\
+	if (__access_ok((unsigned long)__pu_addr, size, segment)) {	\
 		__pu_err = 0;						\
 		switch (size) {						\
-		  case 1: __put_user_8(x,__pu_addr); break;		\
-		  case 2: __put_user_16(x,__pu_addr); break;		\
-		  case 4: __put_user_32(x,__pu_addr); break;		\
-		  case 8: __put_user_64(x,__pu_addr); break;		\
+		  case 1: __put_user_8(x, __pu_addr); break;		\
+		  case 2: __put_user_16(x, __pu_addr); break;		\
+		  case 4: __put_user_32(x, __pu_addr); break;		\
+		  case 8: __put_user_64(x, __pu_addr); break;		\
 		  default: __put_user_unknown(); break;			\
 		}							\
 	}								\
@@ -237,7 +237,7 @@ extern void __put_user_unknown(void);
  * instead of writing: this is because they do not write to
  * any memory gcc knows about, so there are no aliasing issues
  */
-#define __put_user_64(x,addr)					\
+#define __put_user_64(x, addr)					\
 __asm__ __volatile__("1: stq %r2,%1\n"				\
 	"2:\n"							\
 	".section __ex_table,\"a\"\n"				\
@@ -247,7 +247,7 @@ __asm__ __volatile__("1: stq %r2,%1\n"				\
 		: "=r"(__pu_err)				\
 		: "m" (__m(addr)), "rJ" (x), "0"(__pu_err))
 
-#define __put_user_32(x,addr)					\
+#define __put_user_32(x, addr)					\
 __asm__ __volatile__("1: stl %r2,%1\n"				\
 	"2:\n"							\
 	".section __ex_table,\"a\"\n"				\
@@ -260,7 +260,7 @@ __asm__ __volatile__("1: stl %r2,%1\n"				\
 #ifdef __alpha_bwx__
 /* Those lucky bastards with ev56 and later CPUs can do byte/word moves.  */
 
-#define __put_user_16(x,addr)					\
+#define __put_user_16(x, addr)					\
 __asm__ __volatile__("1: stw %r2,%1\n"				\
 	"2:\n"							\
 	".section __ex_table,\"a\"\n"				\
@@ -270,7 +270,7 @@ __asm__ __volatile__("1: stw %r2,%1\n"				\
 		: "=r"(__pu_err)				\
 		: "m"(__m(addr)), "rJ"(x), "0"(__pu_err))
 
-#define __put_user_8(x,addr)					\
+#define __put_user_8(x, addr)					\
 __asm__ __volatile__("1: stb %r2,%1\n"				\
 	"2:\n"							\
 	".section __ex_table,\"a\"\n"				\
@@ -283,7 +283,7 @@ __asm__ __volatile__("1: stb %r2,%1\n"				\
 /* Unfortunately, we can't get an unaligned access trap for the sub-word
    write, so we have to do a general unaligned operation.  */
 
-#define __put_user_16(x,addr)					\
+#define __put_user_16(x, addr)					\
 {								\
 	long __pu_tmp1, __pu_tmp2, __pu_tmp3, __pu_tmp4;	\
 	__asm__ __volatile__(					\
@@ -314,7 +314,7 @@ __asm__ __volatile__("1: stb %r2,%1\n"				\
 		: "r"(addr), "r"((unsigned long)(x)), "0"(__pu_err)); \
 }
 
-#define __put_user_8(x,addr)					\
+#define __put_user_8(x, addr)					\
 {								\
 	long __pu_tmp1, __pu_tmp2;				\
 	__asm__ __volatile__(					\
@@ -366,7 +366,7 @@ __copy_tofrom_user_nocheck(void *to, const void *from, long len)
 		: "=r" (__cu_len), "=r" (__cu_from), "=r" (__cu_to)
 		: __module_address(__copy_user)
 		  "0" (__cu_len), "1" (__cu_from), "2" (__cu_to)
-		: "$1","$2","$3","$4","$5","$28","memory");
+		: "$1", "$2", "$3", "$4", "$5", "$28", "memory");
 
 	return __cu_len;
 }
@@ -379,15 +379,15 @@ __copy_tofrom_user(void *to, const void *from, long len, const void __user *vali
 	return len;
 }
 
-#define __copy_to_user(to,from,n)					\
+#define __copy_to_user(to, from, n)					\
 ({									\
 	__chk_user_ptr(to);						\
-	__copy_tofrom_user_nocheck((__force void *)(to),(from),(n));	\
+	__copy_tofrom_user_nocheck((__force void *)(to), (from), (n));	\
 })
-#define __copy_from_user(to,from,n)					\
+#define __copy_from_user(to, from, n)					\
 ({									\
 	__chk_user_ptr(from);						\
-	__copy_tofrom_user_nocheck((to),(__force void *)(from),(n));	\
+	__copy_tofrom_user_nocheck((to), (__force void *)(from), (n));	\
 })
 
 #define __copy_to_user_inatomic __copy_to_user
@@ -418,7 +418,7 @@ __clear_user(void __user *to, long len)
 		: "=r"(__cl_len), "=r"(__cl_to)
 		: __module_address(__do_clear_user)
 		  "0"(__cl_len), "1"(__cl_to)
-		: "$1","$2","$3","$4","$5","$28","memory");
+		: "$1", "$2", "$3", "$4", "$5", "$28", "memory");
 	return __cl_len;
 }
 

arch/arm/include/asm/uaccess.h

@@ -73,7 +73,7 @@ static inline void set_fs(mm_segment_t fs)
 	modify_domain(DOMAIN_KERNEL, fs ? DOMAIN_CLIENT : DOMAIN_MANAGER);
 }
 
-#define segment_eq(a,b)	((a) == (b))
+#define segment_eq(a, b)	((a) == (b))
 
 #define __addr_ok(addr) ({ \
 	unsigned long flag; \
@@ -84,7 +84,7 @@ static inline void set_fs(mm_segment_t fs)
 	(flag == 0); })
 
 /* We use 33-bit arithmetic here... */
-#define __range_ok(addr,size) ({ \
+#define __range_ok(addr, size) ({ \
 	unsigned long flag, roksum; \
 	__chk_user_ptr(addr);	\
 	__asm__("adds %1, %2, %3; sbcccs %1, %1, %0; movcc %0, #0" \
@@ -123,7 +123,7 @@ extern int __get_user_64t_4(void *);
 #define __GUP_CLOBBER_32t_8 "lr", "cc"
 #define __GUP_CLOBBER_8	"lr", "cc"
 
-#define __get_user_x(__r2,__p,__e,__l,__s)				\
+#define __get_user_x(__r2, __p, __e, __l, __s)				\
 	   __asm__ __volatile__ (					\
 		__asmeq("%0", "r0") __asmeq("%1", "r2")			\
 		__asmeq("%3", "r1")					\
@@ -158,7 +158,7 @@ extern int __get_user_64t_4(void *);
 #endif
 
 
-#define __get_user_check(x,p)							\
+#define __get_user_check(x, p)						\
 	({								\
 		unsigned long __limit = current_thread_info()->addr_limit - 1; \
 		register const typeof(*(p)) __user *__p asm("r0") = (p);\
@@ -196,10 +196,10 @@ extern int __get_user_64t_4(void *);
 		__e;							\
 	})
 
-#define get_user(x,p)							\
+#define get_user(x, p)							\
 	({								\
 		might_fault();						\
-		__get_user_check(x,p);					\
+		__get_user_check(x, p);					\
 	 })
 
 extern int __put_user_1(void *, unsigned int);
@@ -207,7 +207,7 @@ extern int __put_user_2(void *, unsigned int);
 extern int __put_user_4(void *, unsigned int);
 extern int __put_user_8(void *, unsigned long long);
 
-#define __put_user_x(__r2,__p,__e,__l,__s)				\
+#define __put_user_x(__r2, __p, __e, __l, __s)				\
 	   __asm__ __volatile__ (					\
 		__asmeq("%0", "r0") __asmeq("%2", "r2")			\
 		__asmeq("%3", "r1")					\
@@ -216,7 +216,7 @@ extern int __put_user_8(void *, unsigned long long);
 		: "0" (__p), "r" (__r2), "r" (__l)			\
 		: "ip", "lr", "cc")
 
-#define __put_user_check(x,p)							\
+#define __put_user_check(x, p)						\
 	({								\
 		unsigned long __limit = current_thread_info()->addr_limit - 1; \
 		const typeof(*(p)) __user *__tmp_p = (p);		\
@@ -242,10 +242,10 @@ extern int __put_user_8(void *, unsigned long long);
 		__e;							\
 	})
 
-#define put_user(x,p)							\
+#define put_user(x, p)							\
 	({								\
 		might_fault();						\
-		__put_user_check(x,p);					\
+		__put_user_check(x, p);					\
 	 })
 
 #else /* CONFIG_MMU */
@@ -255,21 +255,21 @@ extern int __put_user_8(void *, unsigned long long);
  */
 #define USER_DS			KERNEL_DS
 
-#define segment_eq(a,b)		(1)
-#define __addr_ok(addr)		((void)(addr),1)
-#define __range_ok(addr,size)	((void)(addr),0)
+#define segment_eq(a, b)		(1)
+#define __addr_ok(addr)		((void)(addr), 1)
+#define __range_ok(addr, size)	((void)(addr), 0)
 #define get_fs()		(KERNEL_DS)
 
 static inline void set_fs(mm_segment_t fs)
 {
 }
 
-#define get_user(x,p)	__get_user(x,p)
-#define put_user(x,p)	__put_user(x,p)
+#define get_user(x, p)	__get_user(x, p)
+#define put_user(x, p)	__put_user(x, p)
 
 #endif /* CONFIG_MMU */
 
-#define access_ok(type,addr,size)	(__range_ok(addr,size) == 0)
+#define access_ok(type, addr, size)	(__range_ok(addr, size) == 0)
 
 #define user_addr_max() \
 	(segment_eq(get_fs(), KERNEL_DS) ? ~0UL : get_fs())
@@ -283,35 +283,35 @@ static inline void set_fs(mm_segment_t fs)
  * error occurs, and leave it unchanged on success.  Note that these
  * versions are void (ie, don't return a value as such).
  */
-#define __get_user(x,ptr)						\
+#define __get_user(x, ptr)						\
 ({									\
 	long __gu_err = 0;						\
-	__get_user_err((x),(ptr),__gu_err);				\
+	__get_user_err((x), (ptr), __gu_err);				\
 	__gu_err;							\
 })
 
-#define __get_user_error(x,ptr,err)					\
+#define __get_user_error(x, ptr, err)					\
 ({									\
-	__get_user_err((x),(ptr),err);					\
+	__get_user_err((x), (ptr), err);				\
 	(void) 0;							\
 })
 
-#define __get_user_err(x,ptr,err)					\
+#define __get_user_err(x, ptr, err)					\
 do {									\
 	unsigned long __gu_addr = (unsigned long)(ptr);			\
 	unsigned long __gu_val;						\
 	__chk_user_ptr(ptr);						\
 	might_fault();							\
 	switch (sizeof(*(ptr))) {					\
-	case 1:	__get_user_asm_byte(__gu_val,__gu_addr,err);	break;	\
-	case 2:	__get_user_asm_half(__gu_val,__gu_addr,err);	break;	\
-	case 4:	__get_user_asm_word(__gu_val,__gu_addr,err);	break;	\
+	case 1:	__get_user_asm_byte(__gu_val, __gu_addr, err);	break;	\
+	case 2:	__get_user_asm_half(__gu_val, __gu_addr, err);	break;	\
+	case 4:	__get_user_asm_word(__gu_val, __gu_addr, err);	break;	\
 	default: (__gu_val) = __get_user_bad();				\
 	}								\
 	(x) = (__typeof__(*(ptr)))__gu_val;				\
 } while (0)
 
-#define __get_user_asm_byte(x,addr,err)				\
+#define __get_user_asm_byte(x, addr, err)			\
 	__asm__ __volatile__(					\
 	"1:	" TUSER(ldrb) "	%1,[%2],#0\n"			\
 	"2:\n"							\
@@ -330,7 +330,7 @@ do {									\
 	: "cc")
 
 #ifndef __ARMEB__
-#define __get_user_asm_half(x,__gu_addr,err)			\
+#define __get_user_asm_half(x, __gu_addr, err)			\
 ({								\
 	unsigned long __b1, __b2;				\
 	__get_user_asm_byte(__b1, __gu_addr, err);		\
@@ -338,7 +338,7 @@ do {									\
 	(x) = __b1 | (__b2 << 8);				\
 })
 #else
-#define __get_user_asm_half(x,__gu_addr,err)			\
+#define __get_user_asm_half(x, __gu_addr, err)			\
 ({								\
 	unsigned long __b1, __b2;				\
 	__get_user_asm_byte(__b1, __gu_addr, err);		\
@@ -347,7 +347,7 @@ do {									\
 })
 #endif
 
-#define __get_user_asm_word(x,addr,err)				\
+#define __get_user_asm_word(x, addr, err)			\
 	__asm__ __volatile__(					\
 	"1:	" TUSER(ldr) "	%1,[%2],#0\n"			\
 	"2:\n"							\
@@ -365,35 +365,35 @@ do {									\
 	: "r" (addr), "i" (-EFAULT)				\
 	: "cc")
 
-#define __put_user(x,ptr)						\
+#define __put_user(x, ptr)						\
 ({									\
 	long __pu_err = 0;						\
-	__put_user_err((x),(ptr),__pu_err);				\
+	__put_user_err((x), (ptr), __pu_err);				\
 	__pu_err;							\
 })
 
-#define __put_user_error(x,ptr,err)					\
+#define __put_user_error(x, ptr, err)					\
 ({									\
-	__put_user_err((x),(ptr),err);					\
+	__put_user_err((x), (ptr), err);				\
 	(void) 0;							\
 })
 
-#define __put_user_err(x,ptr,err)					\
+#define __put_user_err(x, ptr, err)					\
 do {									\
 	unsigned long __pu_addr = (unsigned long)(ptr);			\
 	__typeof__(*(ptr)) __pu_val = (x);				\
 	__chk_user_ptr(ptr);						\
 	might_fault();							\
 	switch (sizeof(*(ptr))) {					\
-	case 1: __put_user_asm_byte(__pu_val,__pu_addr,err);	break;	\
-	case 2: __put_user_asm_half(__pu_val,__pu_addr,err);	break;	\
-	case 4: __put_user_asm_word(__pu_val,__pu_addr,err);	break;	\
-	case 8:	__put_user_asm_dword(__pu_val,__pu_addr,err);	break;	\
+	case 1: __put_user_asm_byte(__pu_val, __pu_addr, err);	break;	\
+	case 2: __put_user_asm_half(__pu_val, __pu_addr, err);	break;	\
+	case 4: __put_user_asm_word(__pu_val, __pu_addr, err);	break;	\
+	case 8:	__put_user_asm_dword(__pu_val, __pu_addr, err);	break;	\
 	default: __put_user_bad();					\
 	}								\
 } while (0)
 
-#define __put_user_asm_byte(x,__pu_addr,err)			\
+#define __put_user_asm_byte(x, __pu_addr, err)			\
 	__asm__ __volatile__(					\
 	"1:	" TUSER(strb) "	%1,[%2],#0\n"			\
 	"2:\n"							\
@@ -411,22 +411,22 @@ do {									\
 	: "cc")
 
 #ifndef __ARMEB__
-#define __put_user_asm_half(x,__pu_addr,err)			\
+#define __put_user_asm_half(x, __pu_addr, err)			\
 ({								\
-	unsigned long __temp = (unsigned long)(x);		\
+	unsigned long __temp = (__force unsigned long)(x);	\
 	__put_user_asm_byte(__temp, __pu_addr, err);		\
 	__put_user_asm_byte(__temp >> 8, __pu_addr + 1, err);	\
 })
 #else
-#define __put_user_asm_half(x,__pu_addr,err)			\
+#define __put_user_asm_half(x, __pu_addr, err)			\
 ({								\
-	unsigned long __temp = (unsigned long)(x);		\
+	unsigned long __temp = (__force unsigned long)(x);	\
 	__put_user_asm_byte(__temp >> 8, __pu_addr, err);	\
 	__put_user_asm_byte(__temp, __pu_addr + 1, err);	\
 })
 #endif
 
-#define __put_user_asm_word(x,__pu_addr,err)			\
+#define __put_user_asm_word(x, __pu_addr, err)			\
 	__asm__ __volatile__(					\
 	"1:	" TUSER(str) "	%1,[%2],#0\n"			\
 	"2:\n"							\
@@ -451,7 +451,7 @@ do {									\
 #define	__reg_oper1	"%R2"
 #endif
 
-#define __put_user_asm_dword(x,__pu_addr,err)			\
+#define __put_user_asm_dword(x, __pu_addr, err)			\
 	__asm__ __volatile__(					\
  ARM(	"1:	" TUSER(str) "	" __reg_oper1 ", [%1], #4\n"	) \
  ARM(	"2:	" TUSER(str) "	" __reg_oper0 ", [%1]\n"	) \
@@ -480,9 +480,9 @@ extern unsigned long __must_check __copy_to_user_std(void __user *to, const void
 extern unsigned long __must_check __clear_user(void __user *addr, unsigned long n);
 extern unsigned long __must_check __clear_user_std(void __user *addr, unsigned long n);
 #else
-#define __copy_from_user(to,from,n)	(memcpy(to, (void __force *)from, n), 0)
-#define __copy_to_user(to,from,n)	(memcpy((void __force *)to, from, n), 0)
-#define __clear_user(addr,n)		(memset((void __force *)addr, 0, n), 0)
+#define __copy_from_user(to, from, n)	(memcpy(to, (void __force *)from, n), 0)
+#define __copy_to_user(to, from, n)	(memcpy((void __force *)to, from, n), 0)
+#define __clear_user(addr, n)		(memset((void __force *)addr, 0, n), 0)
 #endif
 
 static inline unsigned long __must_check copy_from_user(void *to, const void __user *from, unsigned long n)

arch/arm64/include/asm/uaccess.h

@@ -63,7 +63,7 @@ static inline void set_fs(mm_segment_t fs)
 	current_thread_info()->addr_limit = fs;
 }
 
-#define segment_eq(a,b)	((a) == (b))
+#define segment_eq(a, b)	((a) == (b))
 
 /*
  * Return 1 if addr < current->addr_limit, 0 otherwise.
@@ -147,7 +147,7 @@ do {									\
 	default:							\
 		BUILD_BUG();						\
 	}								\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 } while (0)
 
 #define __get_user(x, ptr)						\

arch/avr32/include/asm/uaccess.h

@@ -26,7 +26,7 @@ typedef struct {
  * For historical reasons (Data Segment Register?), these macros are misnamed.
  */
 #define MAKE_MM_SEG(s)	((mm_segment_t) { (s) })
-#define segment_eq(a,b)	((a).is_user_space == (b).is_user_space)
+#define segment_eq(a, b)	((a).is_user_space == (b).is_user_space)
 
 #define USER_ADDR_LIMIT 0x80000000
 
@@ -108,8 +108,8 @@ static inline __kernel_size_t __copy_from_user(void *to,
  *
  * Returns zero on success, or -EFAULT on error.
  */
-#define put_user(x,ptr)	\
-	__put_user_check((x),(ptr),sizeof(*(ptr)))
+#define put_user(x, ptr)	\
+	__put_user_check((x), (ptr), sizeof(*(ptr)))
 
 /*
  * get_user: - Get a simple variable from user space.
@@ -128,8 +128,8 @@ static inline __kernel_size_t __copy_from_user(void *to,
  * Returns zero on success, or -EFAULT on error.
  * On error, the variable @x is set to zero.
  */
-#define get_user(x,ptr) \
-	__get_user_check((x),(ptr),sizeof(*(ptr)))
+#define get_user(x, ptr) \
+	__get_user_check((x), (ptr), sizeof(*(ptr)))
 
 /*
  * __put_user: - Write a simple value into user space, with less checking.
@@ -150,8 +150,8 @@ static inline __kernel_size_t __copy_from_user(void *to,
  *
  * Returns zero on success, or -EFAULT on error.
  */
-#define __put_user(x,ptr) \
-	__put_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __put_user(x, ptr) \
+	__put_user_nocheck((x), (ptr), sizeof(*(ptr)))
 
 /*
  * __get_user: - Get a simple variable from user space, with less checking.
@@ -173,8 +173,8 @@ static inline __kernel_size_t __copy_from_user(void *to,
  * Returns zero on success, or -EFAULT on error.
  * On error, the variable @x is set to zero.
  */
-#define __get_user(x,ptr) \
-	__get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __get_user(x, ptr) \
+	__get_user_nocheck((x), (ptr), sizeof(*(ptr)))
 
 extern int __get_user_bad(void);
 extern int __put_user_bad(void);
@@ -191,7 +191,7 @@ extern int __put_user_bad(void);
 	default: __gu_err = __get_user_bad(); break;			\
 	}								\
 									\
-	x = (typeof(*(ptr)))__gu_val;					\
+	x = (__force typeof(*(ptr)))__gu_val;				\
 	__gu_err;							\
 })
 
@@ -222,7 +222,7 @@ extern int __put_user_bad(void);
 	} else {							\
 		__gu_err = -EFAULT;					\
 	}								\
-	x = (typeof(*(ptr)))__gu_val;					\
+	x = (__force typeof(*(ptr)))__gu_val;				\
 	__gu_err;							\
 })
 

arch/blackfin/include/asm/uaccess.h

@@ -27,7 +27,7 @@ static inline void set_fs(mm_segment_t fs)
 	current_thread_info()->addr_limit = fs;
 }
 
-#define segment_eq(a,b) ((a) == (b))
+#define segment_eq(a, b) ((a) == (b))
 
 #define VERIFY_READ	0
 #define VERIFY_WRITE	1
@@ -68,7 +68,7 @@ struct exception_table_entry {
  * use the right size if we just have the right pointer type.
  */
 
-#define put_user(x,p)						\
+#define put_user(x, p)						\
 	({							\
 		int _err = 0;					\
 		typeof(*(p)) _x = (x);				\
@@ -89,10 +89,10 @@ struct exception_table_entry {
 			break;					\
 		case 8: {					\
 			long _xl, _xh;				\
-			_xl = ((long *)&_x)[0];			\
-			_xh = ((long *)&_x)[1];			\
-			__put_user_asm(_xl, ((long __user *)_p)+0, );	\
-			__put_user_asm(_xh, ((long __user *)_p)+1, );	\
+			_xl = ((__force long *)&_x)[0];		\
+			_xh = ((__force long *)&_x)[1];		\
+			__put_user_asm(_xl, ((__force long __user *)_p)+0, );\
+			__put_user_asm(_xh, ((__force long __user *)_p)+1, );\
 		} break;					\
 		default:					\
 			_err = __put_user_bad();		\
@@ -102,7 +102,7 @@ struct exception_table_entry {
 		_err;						\
 	})
 
-#define __put_user(x,p) put_user(x,p)
+#define __put_user(x, p) put_user(x, p)
 static inline int bad_user_access_length(void)
 {
 	panic("bad_user_access_length");
@@ -121,10 +121,10 @@ static inline int bad_user_access_length(void)
 
 #define __ptr(x) ((unsigned long __force *)(x))
 
-#define __put_user_asm(x,p,bhw)				\
+#define __put_user_asm(x, p, bhw)			\
 	__asm__ (#bhw"[%1] = %0;\n\t"			\
 		 : /* no outputs */			\
-		 :"d" (x),"a" (__ptr(p)) : "memory")
+		 :"d" (x), "a" (__ptr(p)) : "memory")
 
 #define get_user(x, ptr)					\
 ({								\
@@ -136,10 +136,10 @@ static inline int bad_user_access_length(void)
 		BUILD_BUG_ON(ptr_size >= 8);			\
 		switch (ptr_size) {				\
 		case 1:						\
-			__get_user_asm(_val, _p, B,(Z));	\
+			__get_user_asm(_val, _p, B, (Z));	\
 			break;					\
 		case 2:						\
-			__get_user_asm(_val, _p, W,(Z));	\
+			__get_user_asm(_val, _p, W, (Z));	\
 			break;					\
 		case 4:						\
 			__get_user_asm(_val, _p,  , );		\
@@ -147,11 +147,11 @@ static inline int bad_user_access_length(void)
 		}						\
 	} else							\
 		_err = -EFAULT;					\
-	x = (typeof(*(ptr)))_val;				\
+	x = (__force typeof(*(ptr)))_val;			\
 	_err;							\
 })
 
-#define __get_user(x,p) get_user(x,p)
+#define __get_user(x, p) get_user(x, p)
 
 #define __get_user_bad() (bad_user_access_length(), (-EFAULT))
 
@@ -168,10 +168,10 @@ static inline int bad_user_access_length(void)
 #define __copy_to_user_inatomic __copy_to_user
 #define __copy_from_user_inatomic __copy_from_user
 
-#define copy_to_user_ret(to,from,n,retval) ({ if (copy_to_user(to,from,n))\
+#define copy_to_user_ret(to, from, n, retval) ({ if (copy_to_user(to, from, n))\
 				                 return retval; })
 
-#define copy_from_user_ret(to,from,n,retval) ({ if (copy_from_user(to,from,n))\
+#define copy_from_user_ret(to, from, n, retval) ({ if (copy_from_user(to, from, n))\
                                                    return retval; })
 
 static inline unsigned long __must_check

arch/cris/include/asm/uaccess.h

@@ -47,12 +47,13 @@
 #define get_fs()	(current_thread_info()->addr_limit)
 #define set_fs(x)	(current_thread_info()->addr_limit = (x))
 
-#define segment_eq(a,b)	((a).seg == (b).seg)
+#define segment_eq(a, b)	((a).seg == (b).seg)
 
 #define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
-#define __user_ok(addr,size) (((size) <= TASK_SIZE)&&((addr) <= TASK_SIZE-(size)))
-#define __access_ok(addr,size) (__kernel_ok || __user_ok((addr),(size)))
-#define access_ok(type,addr,size) __access_ok((unsigned long)(addr),(size))
+#define __user_ok(addr, size) \
+	(((size) <= TASK_SIZE)&&((addr) <= TASK_SIZE-(size)))
+#define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size)))
+#define access_ok(type, addr, size) __access_ok((unsigned long)(addr), (size))
 
 #include <arch/uaccess.h>
 
@@ -92,55 +93,55 @@ struct exception_table_entry
  * CRIS, we can just do these as direct assignments.  (Of course, the
  * exception handling means that it's no longer "just"...)
  */
-#define get_user(x,ptr) \
-  __get_user_check((x),(ptr),sizeof(*(ptr)))
-#define put_user(x,ptr) \
-  __put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
+#define get_user(x, ptr) \
+  __get_user_check((x), (ptr), sizeof(*(ptr)))
+#define put_user(x, ptr) \
+  __put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
 
-#define __get_user(x,ptr) \
-  __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
-#define __put_user(x,ptr) \
-  __put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
+#define __get_user(x, ptr) \
+  __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
+#define __put_user(x, ptr) \
+  __put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
 
 extern long __put_user_bad(void);
 
-#define __put_user_size(x,ptr,size,retval)			\
+#define __put_user_size(x, ptr, size, retval)				\
 do {									\
 	retval = 0;							\
 	switch (size) {							\
-	  case 1: __put_user_asm(x,ptr,retval,"move.b"); break;	\
-	  case 2: __put_user_asm(x,ptr,retval,"move.w"); break;	\
-	  case 4: __put_user_asm(x,ptr,retval,"move.d"); break;	\
-	  case 8: __put_user_asm_64(x,ptr,retval); break;	\
+	  case 1: __put_user_asm(x, ptr, retval, "move.b"); break;	\
+	  case 2: __put_user_asm(x, ptr, retval, "move.w"); break;	\
+	  case 4: __put_user_asm(x, ptr, retval, "move.d"); break;	\
+	  case 8: __put_user_asm_64(x, ptr, retval); break;		\
 	  default: __put_user_bad();					\
 	}								\
 } while (0)
 
-#define __get_user_size(x,ptr,size,retval)			\
+#define __get_user_size(x, ptr, size, retval)				\
 do {									\
 	retval = 0;							\
 	switch (size) {							\
-	  case 1: __get_user_asm(x,ptr,retval,"move.b"); break;	\
-	  case 2: __get_user_asm(x,ptr,retval,"move.w"); break;	\
-	  case 4: __get_user_asm(x,ptr,retval,"move.d"); break;	\
-	  case 8: __get_user_asm_64(x,ptr,retval); break;	\
+	  case 1: __get_user_asm(x, ptr, retval, "move.b"); break;	\
+	  case 2: __get_user_asm(x, ptr, retval, "move.w"); break;	\
+	  case 4: __get_user_asm(x, ptr, retval, "move.d"); break;	\
+	  case 8: __get_user_asm_64(x, ptr, retval); break;		\
 	  default: (x) = __get_user_bad();				\
 	}								\
 } while (0)
 
-#define __put_user_nocheck(x,ptr,size)			\
+#define __put_user_nocheck(x, ptr, size)		\
 ({							\
 	long __pu_err;					\
-	__put_user_size((x),(ptr),(size),__pu_err);	\
+	__put_user_size((x), (ptr), (size), __pu_err);	\
 	__pu_err;					\
 })
 
-#define __put_user_check(x,ptr,size)				\
+#define __put_user_check(x, ptr, size)					\
 ({									\
 	long __pu_err = -EFAULT;					\
 	__typeof__(*(ptr)) *__pu_addr = (ptr);				\
-	if (access_ok(VERIFY_WRITE,__pu_addr,size))		\
-		__put_user_size((x),__pu_addr,(size),__pu_err);	\
+	if (access_ok(VERIFY_WRITE, __pu_addr, size))			\
+		__put_user_size((x), __pu_addr, (size), __pu_err);	\
 	__pu_err;							\
 })
 
@@ -149,21 +150,21 @@ struct __large_struct { unsigned long buf[100]; };
 
 
 
-#define __get_user_nocheck(x,ptr,size)				\
+#define __get_user_nocheck(x, ptr, size)			\
 ({								\
 	long __gu_err, __gu_val;				\
-	__get_user_size(__gu_val,(ptr),(size),__gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;			\
+	__get_user_size(__gu_val, (ptr), (size), __gu_err);	\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;		\
 	__gu_err;						\
 })
 
-#define __get_user_check(x,ptr,size)					\
+#define __get_user_check(x, ptr, size)					\
 ({									\
 	long __gu_err = -EFAULT, __gu_val = 0;				\
 	const __typeof__(*(ptr)) *__gu_addr = (ptr);			\
-	if (access_ok(VERIFY_READ,__gu_addr,size))			\
-		__get_user_size(__gu_val,__gu_addr,(size),__gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	if (access_ok(VERIFY_READ, __gu_addr, size))			\
+		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;							\
 })
 
@@ -180,7 +181,7 @@ static inline unsigned long
 __generic_copy_to_user(void __user *to, const void *from, unsigned long n)
 {
 	if (access_ok(VERIFY_WRITE, to, n))
-		return __copy_user(to,from,n);
+		return __copy_user(to, from, n);
 	return n;
 }
 
@@ -188,7 +189,7 @@ static inline unsigned long
 __generic_copy_from_user(void *to, const void __user *from, unsigned long n)
 {
 	if (access_ok(VERIFY_READ, from, n))
-		return __copy_user_zeroing(to,from,n);
+		return __copy_user_zeroing(to, from, n);
 	return n;
 }
 
@@ -196,7 +197,7 @@ static inline unsigned long
 __generic_clear_user(void __user *to, unsigned long n)
 {
 	if (access_ok(VERIFY_WRITE, to, n))
-		return __do_clear_user(to,n);
+		return __do_clear_user(to, n);
 	return n;
 }
 
@@ -373,29 +374,31 @@ static inline unsigned long
 __generic_copy_from_user_nocheck(void *to, const void __user *from,
 				 unsigned long n)
 {
-	return __copy_user_zeroing(to,from,n);
+	return __copy_user_zeroing(to, from, n);
 }
 
 static inline unsigned long
 __generic_copy_to_user_nocheck(void __user *to, const void *from,
 			       unsigned long n)
 {
-	return __copy_user(to,from,n);
+	return __copy_user(to, from, n);
 }
 
 static inline unsigned long
 __generic_clear_user_nocheck(void __user *to, unsigned long n)
 {
-	return __do_clear_user(to,n);
+	return __do_clear_user(to, n);
 }
 
 /* without checking */
 
-#define __copy_to_user(to,from,n)   __generic_copy_to_user_nocheck((to),(from),(n))
-#define __copy_from_user(to,from,n) __generic_copy_from_user_nocheck((to),(from),(n))
+#define __copy_to_user(to, from, n) \
+	__generic_copy_to_user_nocheck((to), (from), (n))
+#define __copy_from_user(to, from, n) \
+	__generic_copy_from_user_nocheck((to), (from), (n))
 #define __copy_to_user_inatomic __copy_to_user
 #define __copy_from_user_inatomic __copy_from_user
-#define __clear_user(to,n) __generic_clear_user_nocheck((to),(n))
+#define __clear_user(to, n) __generic_clear_user_nocheck((to), (n))
 
 #define strlen_user(str)	strnlen_user((str), 0x7ffffffe)
 

arch/frv/include/asm/segment.h

@@ -31,7 +31,7 @@ typedef struct {
 
 #define get_ds()		(KERNEL_DS)
 #define get_fs()		(__current_thread_info->addr_limit)
-#define segment_eq(a,b)		((a).seg == (b).seg)
+#define segment_eq(a, b)	((a).seg == (b).seg)
 #define __kernel_ds_p()		segment_eq(get_fs(), KERNEL_DS)
 #define get_addr_limit()	(get_fs().seg)
 

arch/ia64/include/asm/uaccess.h

@@ -171,7 +171,8 @@ do {									\
 } while (0)
 # define __put_user_size(val, addr, n, err)				\
 do {									\
-	__st_user("__ex_table", (unsigned long) addr, n, RELOC_TYPE, (unsigned long) (val));	\
+	__st_user("__ex_table", (unsigned long) addr, n, RELOC_TYPE,	\
+		  (__force unsigned long) (val));			\
 	(err) = ia64_getreg(_IA64_REG_R8);				\
 } while (0)
 #endif /* !ASM_SUPPORTED */
@@ -197,7 +198,7 @@ extern void __get_user_unknown (void);
 		      case 8: __get_user_size(__gu_val, __gu_ptr, 8, __gu_err); break;	\
 		      default: __get_user_unknown(); break;				\
 		}									\
-	(x) = (__typeof__(*(__gu_ptr))) __gu_val;					\
+	(x) = (__force __typeof__(*(__gu_ptr))) __gu_val;				\
 	__gu_err;									\
 })
 

arch/m32r/include/asm/uaccess.h

@@ -54,7 +54,7 @@ static inline void set_fs(mm_segment_t s)
 
 #endif /* not CONFIG_MMU */
 
-#define segment_eq(a,b)	((a).seg == (b).seg)
+#define segment_eq(a, b)	((a).seg == (b).seg)
 
 #define __addr_ok(addr) \
 	((unsigned long)(addr) < (current_thread_info()->addr_limit.seg))
@@ -68,7 +68,7 @@ static inline void set_fs(mm_segment_t s)
  *
  * This needs 33-bit arithmetic. We have a carry...
  */
-#define __range_ok(addr,size) ({					\
+#define __range_ok(addr, size) ({					\
 	unsigned long flag, roksum; 					\
 	__chk_user_ptr(addr);						\
 	asm ( 								\
@@ -103,7 +103,7 @@ static inline void set_fs(mm_segment_t s)
  * this function, memory access functions may still return -EFAULT.
  */
 #ifdef CONFIG_MMU
-#define access_ok(type,addr,size) (likely(__range_ok(addr,size) == 0))
+#define access_ok(type, addr, size) (likely(__range_ok(addr, size) == 0))
 #else
 static inline int access_ok(int type, const void *addr, unsigned long size)
 {
@@ -167,8 +167,8 @@ extern int fixup_exception(struct pt_regs *regs);
  * Returns zero on success, or -EFAULT on error.
  * On error, the variable @x is set to zero.
  */
-#define get_user(x,ptr)							\
-	__get_user_check((x),(ptr),sizeof(*(ptr)))
+#define get_user(x, ptr)							\
+	__get_user_check((x), (ptr), sizeof(*(ptr)))
 
 /**
  * put_user: - Write a simple value into user space.
@@ -186,8 +186,8 @@ extern int fixup_exception(struct pt_regs *regs);
  *
  * Returns zero on success, or -EFAULT on error.
  */
-#define put_user(x,ptr)							\
-	__put_user_check((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
+#define put_user(x, ptr)							\
+	__put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
 
 /**
  * __get_user: - Get a simple variable from user space, with less checking.
@@ -209,41 +209,41 @@ extern int fixup_exception(struct pt_regs *regs);
  * Returns zero on success, or -EFAULT on error.
  * On error, the variable @x is set to zero.
  */
-#define __get_user(x,ptr) \
-	__get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __get_user(x, ptr) \
+	__get_user_nocheck((x), (ptr), sizeof(*(ptr)))
 
-#define __get_user_nocheck(x,ptr,size)					\
+#define __get_user_nocheck(x, ptr, size)				\
 ({									\
 	long __gu_err = 0;						\
 	unsigned long __gu_val;						\
 	might_fault();							\
-	__get_user_size(__gu_val,(ptr),(size),__gu_err);		\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	__get_user_size(__gu_val, (ptr), (size), __gu_err);		\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;							\
 })
 
-#define __get_user_check(x,ptr,size)					\
+#define __get_user_check(x, ptr, size)					\
 ({									\
 	long __gu_err = -EFAULT;					\
 	unsigned long __gu_val = 0;					\
 	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
 	might_fault();							\
-	if (access_ok(VERIFY_READ,__gu_addr,size))			\
-		__get_user_size(__gu_val,__gu_addr,(size),__gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	if (access_ok(VERIFY_READ, __gu_addr, size))			\
+		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;							\
 })
 
 extern long __get_user_bad(void);
 
-#define __get_user_size(x,ptr,size,retval)				\
+#define __get_user_size(x, ptr, size, retval)				\
 do {									\
 	retval = 0;							\
 	__chk_user_ptr(ptr);						\
 	switch (size) {							\
-	  case 1: __get_user_asm(x,ptr,retval,"ub"); break;		\
-	  case 2: __get_user_asm(x,ptr,retval,"uh"); break;		\
-	  case 4: __get_user_asm(x,ptr,retval,""); break;		\
+	  case 1: __get_user_asm(x, ptr, retval, "ub"); break;		\
+	  case 2: __get_user_asm(x, ptr, retval, "uh"); break;		\
+	  case 4: __get_user_asm(x, ptr, retval, ""); break;		\
 	  default: (x) = __get_user_bad();				\
 	}								\
 } while (0)
@@ -288,26 +288,26 @@ do {									\
  *
  * Returns zero on success, or -EFAULT on error.
  */
-#define __put_user(x,ptr) \
-	__put_user_nocheck((__typeof__(*(ptr)))(x),(ptr),sizeof(*(ptr)))
+#define __put_user(x, ptr) \
+	__put_user_nocheck((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr)))
 
 
-#define __put_user_nocheck(x,ptr,size)					\
+#define __put_user_nocheck(x, ptr, size)				\
 ({									\
 	long __pu_err;							\
 	might_fault();							\
-	__put_user_size((x),(ptr),(size),__pu_err);			\
+	__put_user_size((x), (ptr), (size), __pu_err);			\
 	__pu_err;							\
 })
 
 
-#define __put_user_check(x,ptr,size)					\
+#define __put_user_check(x, ptr, size)					\
 ({									\
 	long __pu_err = -EFAULT;					\
 	__typeof__(*(ptr)) __user *__pu_addr = (ptr);			\
 	might_fault();							\
-	if (access_ok(VERIFY_WRITE,__pu_addr,size))			\
-		__put_user_size((x),__pu_addr,(size),__pu_err);		\
+	if (access_ok(VERIFY_WRITE, __pu_addr, size))			\
+		__put_user_size((x), __pu_addr, (size), __pu_err);	\
 	__pu_err;							\
 })
 
@@ -366,15 +366,15 @@ do {									\
 
 extern void __put_user_bad(void);
 
-#define __put_user_size(x,ptr,size,retval)				\
+#define __put_user_size(x, ptr, size, retval)				\
 do {									\
 	retval = 0;							\
 	__chk_user_ptr(ptr);						\
 	switch (size) {							\
-	  case 1: __put_user_asm(x,ptr,retval,"b"); break;		\
-	  case 2: __put_user_asm(x,ptr,retval,"h"); break;		\
-	  case 4: __put_user_asm(x,ptr,retval,""); break;		\
-	  case 8: __put_user_u64((__typeof__(*ptr))(x),ptr,retval); break;\
+	  case 1: __put_user_asm(x, ptr, retval, "b"); break;		\
+	  case 2: __put_user_asm(x, ptr, retval, "h"); break;		\
+	  case 4: __put_user_asm(x, ptr, retval, ""); break;		\
+	  case 8: __put_user_u64((__typeof__(*ptr))(x), ptr, retval); break;\
 	  default: __put_user_bad();					\
 	}								\
 } while (0)
@@ -421,7 +421,7 @@ struct __large_struct { unsigned long buf[100]; };
 
 /* Generic arbitrary sized copy.  */
 /* Return the number of bytes NOT copied.  */
-#define __copy_user(to,from,size)					\
+#define __copy_user(to, from, size)					\
 do {									\
 	unsigned long __dst, __src, __c;				\
 	__asm__ __volatile__ (						\
@@ -478,7 +478,7 @@ do {									\
 		: "r14", "memory");					\
 } while (0)
 
-#define __copy_user_zeroing(to,from,size)				\
+#define __copy_user_zeroing(to, from, size)				\
 do {									\
 	unsigned long __dst, __src, __c;				\
 	__asm__ __volatile__ (						\
@@ -548,14 +548,14 @@ do {									\
 static inline unsigned long __generic_copy_from_user_nocheck(void *to,
 	const void __user *from, unsigned long n)
 {
-	__copy_user_zeroing(to,from,n);
+	__copy_user_zeroing(to, from, n);
 	return n;
 }
 
 static inline unsigned long __generic_copy_to_user_nocheck(void __user *to,
 	const void *from, unsigned long n)
 {
-	__copy_user(to,from,n);
+	__copy_user(to, from, n);
 	return n;
 }
 
@@ -576,8 +576,8 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon
  * Returns number of bytes that could not be copied.
  * On success, this will be zero.
  */
-#define __copy_to_user(to,from,n)			\
-	__generic_copy_to_user_nocheck((to),(from),(n))
+#define __copy_to_user(to, from, n)			\
+	__generic_copy_to_user_nocheck((to), (from), (n))
 
 #define __copy_to_user_inatomic __copy_to_user
 #define __copy_from_user_inatomic __copy_from_user
@@ -595,10 +595,10 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon
  * Returns number of bytes that could not be copied.
  * On success, this will be zero.
  */
-#define copy_to_user(to,from,n)				\
+#define copy_to_user(to, from, n)			\
 ({							\
 	might_fault();					\
-	__generic_copy_to_user((to),(from),(n));	\
+	__generic_copy_to_user((to), (from), (n));	\
 })
 
 /**
@@ -617,8 +617,8 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon
  * If some data could not be copied, this function will pad the copied
  * data to the requested size using zero bytes.
  */
-#define __copy_from_user(to,from,n)			\
-	__generic_copy_from_user_nocheck((to),(from),(n))
+#define __copy_from_user(to, from, n)			\
+	__generic_copy_from_user_nocheck((to), (from), (n))
 
 /**
  * copy_from_user: - Copy a block of data from user space.
@@ -636,10 +636,10 @@ unsigned long __generic_copy_from_user(void *, const void __user *, unsigned lon
  * If some data could not be copied, this function will pad the copied
  * data to the requested size using zero bytes.
  */
-#define copy_from_user(to,from,n)			\
+#define copy_from_user(to, from, n)			\
 ({							\
 	might_fault();					\
-	__generic_copy_from_user((to),(from),(n));	\
+	__generic_copy_from_user((to), (from), (n));	\
 })
 
 long __must_check strncpy_from_user(char *dst, const char __user *src,

arch/m68k/include/asm/segment.h

@@ -58,7 +58,7 @@ static inline mm_segment_t get_ds(void)
 #define set_fs(x)	(current_thread_info()->addr_limit = (x))
 #endif
 
-#define segment_eq(a,b)	((a).seg == (b).seg)
+#define segment_eq(a, b) ((a).seg == (b).seg)
 
 #endif /* __ASSEMBLY__ */
 

arch/m68k/include/asm/uaccess_mm.h

@@ -146,7 +146,7 @@ asm volatile ("\n"					\
 		"	.previous"					\
 		: "+d" (res), "=&" #reg (__gu_val)			\
 		: "m" (*(ptr)), "i" (err));				\
-	(x) = (typeof(*(ptr)))(unsigned long)__gu_val;		\
+	(x) = (__force typeof(*(ptr)))(__force unsigned long)__gu_val;	\
 })
 
 #define __get_user(x, ptr)						\
@@ -188,7 +188,7 @@ asm volatile ("\n"					\
 			  "+a" (__gu_ptr)				\
 			: "i" (-EFAULT)					\
 			: "memory");					\
-		(x) = (typeof(*(ptr)))__gu_val;				\
+		(x) = (__force typeof(*(ptr)))__gu_val;			\
 		break;							\
 	    }	*/							\
 	default:							\

arch/metag/include/asm/uaccess.h

@@ -112,13 +112,18 @@ do {                                                            \
 	retval = 0;                                                     \
 	switch (size) {                                                 \
 	case 1:								\
-		retval = __put_user_asm_b((unsigned int)x, ptr); break;	\
+		retval = __put_user_asm_b((__force unsigned int)x, ptr);\
+		break;							\
 	case 2:								\
-		retval = __put_user_asm_w((unsigned int)x, ptr); break;	\
+		retval = __put_user_asm_w((__force unsigned int)x, ptr);\
+		break;							\
 	case 4:								\
-		retval = __put_user_asm_d((unsigned int)x, ptr); break;	\
+		retval = __put_user_asm_d((__force unsigned int)x, ptr);\
+		break;							\
 	case 8:								\
-		retval = __put_user_asm_l((unsigned long long)x, ptr); break; \
+		retval = __put_user_asm_l((__force unsigned long long)x,\
+					  ptr);				\
+		break;							\
 	default:							\
 		__put_user_bad();					\
 	}								\
@@ -135,7 +140,7 @@ extern long __get_user_bad(void);
 ({                                                              \
 	long __gu_err, __gu_val;                                \
 	__get_user_size(__gu_val, (ptr), (size), __gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;                     \
+	(x) = (__force __typeof__(*(ptr)))__gu_val;             \
 	__gu_err;                                               \
 })
 
@@ -145,7 +150,7 @@ extern long __get_user_bad(void);
 	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);		\
 	if (access_ok(VERIFY_READ, __gu_addr, size))			\
 		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;                             \
+	(x) = (__force __typeof__(*(ptr)))__gu_val;                     \
 	__gu_err;                                                       \
 })
 

arch/openrisc/include/asm/uaccess.h

@@ -192,7 +192,7 @@ struct __large_struct {
 ({								\
 	long __gu_err, __gu_val;				\
 	__get_user_size(__gu_val, (ptr), (size), __gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;			\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;		\
 	__gu_err;						\
 })
 
@@ -202,7 +202,7 @@ struct __large_struct {
 	const __typeof__(*(ptr)) * __gu_addr = (ptr);			\
 	if (access_ok(VERIFY_READ, __gu_addr, size))			\
 		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;							\
 })
 

arch/parisc/include/asm/uaccess.h

@@ -17,7 +17,7 @@
 #define KERNEL_DS	((mm_segment_t){0})
 #define USER_DS 	((mm_segment_t){1})
 
-#define segment_eq(a,b)	((a).seg == (b).seg)
+#define segment_eq(a, b) ((a).seg == (b).seg)
 
 #define get_ds()	(KERNEL_DS)
 #define get_fs()	(current_thread_info()->addr_limit)
@@ -42,14 +42,14 @@ static inline long access_ok(int type, const void __user * addr,
 #if !defined(CONFIG_64BIT)
 #define LDD_KERNEL(ptr)		BUILD_BUG()
 #define LDD_USER(ptr)		BUILD_BUG()
-#define STD_KERNEL(x, ptr)	__put_kernel_asm64(x,ptr)
-#define STD_USER(x, ptr)	__put_user_asm64(x,ptr)
+#define STD_KERNEL(x, ptr)	__put_kernel_asm64(x, ptr)
+#define STD_USER(x, ptr)	__put_user_asm64(x, ptr)
 #define ASM_WORD_INSN		".word\t"
 #else
-#define LDD_KERNEL(ptr)		__get_kernel_asm("ldd",ptr)
-#define LDD_USER(ptr)		__get_user_asm("ldd",ptr)
-#define STD_KERNEL(x, ptr)	__put_kernel_asm("std",x,ptr)
-#define STD_USER(x, ptr)	__put_user_asm("std",x,ptr)
+#define LDD_KERNEL(ptr)		__get_kernel_asm("ldd", ptr)
+#define LDD_USER(ptr)		__get_user_asm("ldd", ptr)
+#define STD_KERNEL(x, ptr)	__put_kernel_asm("std", x, ptr)
+#define STD_USER(x, ptr)	__put_user_asm("std", x, ptr)
 #define ASM_WORD_INSN		".dword\t"
 #endif
 
@@ -80,68 +80,68 @@ struct exception_data {
 	unsigned long fault_addr;
 };
 
-#define __get_user(x,ptr)                               \
+#define __get_user(x, ptr)                               \
 ({                                                       \
 	register long __gu_err __asm__ ("r8") = 0;       \
 	register long __gu_val __asm__ ("r9") = 0;       \
 							 \
-	if (segment_eq(get_fs(),KERNEL_DS)) {           \
+	if (segment_eq(get_fs(), KERNEL_DS)) {           \
 	    switch (sizeof(*(ptr))) {                    \
-	    case 1: __get_kernel_asm("ldb",ptr); break; \
-	    case 2: __get_kernel_asm("ldh",ptr); break; \
-	    case 4: __get_kernel_asm("ldw",ptr); break; \
+	    case 1: __get_kernel_asm("ldb", ptr); break; \
+	    case 2: __get_kernel_asm("ldh", ptr); break; \
+	    case 4: __get_kernel_asm("ldw", ptr); break; \
 	    case 8: LDD_KERNEL(ptr); break;		 \
 	    default: BUILD_BUG(); break;		 \
 	    }                                            \
 	}                                                \
 	else {                                           \
 	    switch (sizeof(*(ptr))) {                    \
-	    case 1: __get_user_asm("ldb",ptr); break;   \
-	    case 2: __get_user_asm("ldh",ptr); break;   \
-	    case 4: __get_user_asm("ldw",ptr); break;   \
+	    case 1: __get_user_asm("ldb", ptr); break;   \
+	    case 2: __get_user_asm("ldh", ptr); break;   \
+	    case 4: __get_user_asm("ldw", ptr); break;   \
 	    case 8: LDD_USER(ptr);  break;		 \
 	    default: BUILD_BUG(); break;		 \
 	    }                                            \
 	}                                                \
 							 \
-	(x) = (__typeof__(*(ptr))) __gu_val;            \
+	(x) = (__force __typeof__(*(ptr))) __gu_val;	 \
 	__gu_err;                                        \
 })
 
-#define __get_kernel_asm(ldx,ptr)                       \
+#define __get_kernel_asm(ldx, ptr)                      \
 	__asm__("\n1:\t" ldx "\t0(%2),%0\n\t"		\
 		ASM_EXCEPTIONTABLE_ENTRY(1b, fixup_get_user_skip_1)\
 		: "=r"(__gu_val), "=r"(__gu_err)        \
 		: "r"(ptr), "1"(__gu_err)		\
 		: "r1");
 
-#define __get_user_asm(ldx,ptr)                         \
+#define __get_user_asm(ldx, ptr)                        \
 	__asm__("\n1:\t" ldx "\t0(%%sr3,%2),%0\n\t"	\
-		ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_get_user_skip_1)\
+		ASM_EXCEPTIONTABLE_ENTRY(1b, fixup_get_user_skip_1)\
 		: "=r"(__gu_val), "=r"(__gu_err)        \
 		: "r"(ptr), "1"(__gu_err)		\
 		: "r1");
 
-#define __put_user(x,ptr)                                       \
+#define __put_user(x, ptr)                                      \
 ({								\
 	register long __pu_err __asm__ ("r8") = 0;      	\
         __typeof__(*(ptr)) __x = (__typeof__(*(ptr)))(x);	\
 								\
-	if (segment_eq(get_fs(),KERNEL_DS)) {                   \
+	if (segment_eq(get_fs(), KERNEL_DS)) {                  \
 	    switch (sizeof(*(ptr))) {                           \
-	    case 1: __put_kernel_asm("stb",__x,ptr); break;     \
-	    case 2: __put_kernel_asm("sth",__x,ptr); break;     \
-	    case 4: __put_kernel_asm("stw",__x,ptr); break;     \
-	    case 8: STD_KERNEL(__x,ptr); break;			\
+	    case 1: __put_kernel_asm("stb", __x, ptr); break;   \
+	    case 2: __put_kernel_asm("sth", __x, ptr); break;   \
+	    case 4: __put_kernel_asm("stw", __x, ptr); break;   \
+	    case 8: STD_KERNEL(__x, ptr); break;		\
 	    default: BUILD_BUG(); break;			\
 	    }                                                   \
 	}                                                       \
 	else {                                                  \
 	    switch (sizeof(*(ptr))) {                           \
-	    case 1: __put_user_asm("stb",__x,ptr); break;       \
-	    case 2: __put_user_asm("sth",__x,ptr); break;       \
-	    case 4: __put_user_asm("stw",__x,ptr); break;       \
-	    case 8: STD_USER(__x,ptr); break;			\
+	    case 1: __put_user_asm("stb", __x, ptr); break;     \
+	    case 2: __put_user_asm("sth", __x, ptr); break;     \
+	    case 4: __put_user_asm("stw", __x, ptr); break;     \
+	    case 8: STD_USER(__x, ptr); break;			\
 	    default: BUILD_BUG(); break;			\
 	    }                                                   \
 	}                                                       \
@@ -159,18 +159,18 @@ struct exception_data {
  * r8/r9 are already listed as err/val.
  */
 
-#define __put_kernel_asm(stx,x,ptr)                         \
+#define __put_kernel_asm(stx, x, ptr)                       \
 	__asm__ __volatile__ (                              \
 		"\n1:\t" stx "\t%2,0(%1)\n\t"		    \
-		ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_put_user_skip_1)\
+		ASM_EXCEPTIONTABLE_ENTRY(1b, fixup_put_user_skip_1)\
 		: "=r"(__pu_err)                            \
 		: "r"(ptr), "r"(x), "0"(__pu_err)	    \
 	    	: "r1")
 
-#define __put_user_asm(stx,x,ptr)                           \
+#define __put_user_asm(stx, x, ptr)                         \
 	__asm__ __volatile__ (                              \
 		"\n1:\t" stx "\t%2,0(%%sr3,%1)\n\t"	    \
-		ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_put_user_skip_1)\
+		ASM_EXCEPTIONTABLE_ENTRY(1b, fixup_put_user_skip_1)\
 		: "=r"(__pu_err)                            \
 		: "r"(ptr), "r"(x), "0"(__pu_err)	    \
 		: "r1")
@@ -178,23 +178,23 @@ struct exception_data {
 
 #if !defined(CONFIG_64BIT)
 
-#define __put_kernel_asm64(__val,ptr) do {		    \
+#define __put_kernel_asm64(__val, ptr) do {		    \
 	__asm__ __volatile__ (				    \
 		"\n1:\tstw %2,0(%1)"			    \
 		"\n2:\tstw %R2,4(%1)\n\t"		    \
-		ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_put_user_skip_2)\
-		ASM_EXCEPTIONTABLE_ENTRY(2b,fixup_put_user_skip_1)\
+		ASM_EXCEPTIONTABLE_ENTRY(1b, fixup_put_user_skip_2)\
+		ASM_EXCEPTIONTABLE_ENTRY(2b, fixup_put_user_skip_1)\
 		: "=r"(__pu_err)                            \
 		: "r"(ptr), "r"(__val), "0"(__pu_err) \
 		: "r1");				    \
 } while (0)
 
-#define __put_user_asm64(__val,ptr) do {	    	    \
+#define __put_user_asm64(__val, ptr) do {	    	    \
 	__asm__ __volatile__ (				    \
 		"\n1:\tstw %2,0(%%sr3,%1)"		    \
 		"\n2:\tstw %R2,4(%%sr3,%1)\n\t"		    \
-		ASM_EXCEPTIONTABLE_ENTRY(1b,fixup_put_user_skip_2)\
-		ASM_EXCEPTIONTABLE_ENTRY(2b,fixup_put_user_skip_1)\
+		ASM_EXCEPTIONTABLE_ENTRY(1b, fixup_put_user_skip_2)\
+		ASM_EXCEPTIONTABLE_ENTRY(2b, fixup_put_user_skip_1)\
 		: "=r"(__pu_err)                            \
 		: "r"(ptr), "r"(__val), "0"(__pu_err) \
 		: "r1");				    \
@@ -211,8 +211,8 @@ extern unsigned long lcopy_to_user(void __user *, const void *, unsigned long);
 extern unsigned long lcopy_from_user(void *, const void __user *, unsigned long);
 extern unsigned long lcopy_in_user(void __user *, const void __user *, unsigned long);
 extern long strncpy_from_user(char *, const char __user *, long);
-extern unsigned lclear_user(void __user *,unsigned long);
-extern long lstrnlen_user(const char __user *,long);
+extern unsigned lclear_user(void __user *, unsigned long);
+extern long lstrnlen_user(const char __user *, long);
 /*
  * Complex access routines -- macros
  */

arch/sh/include/asm/segment.h

@@ -23,7 +23,7 @@ typedef struct {
 #define USER_DS		KERNEL_DS
 #endif
 
-#define segment_eq(a,b)	((a).seg == (b).seg)
+#define segment_eq(a, b) ((a).seg == (b).seg)
 
 #define get_ds()	(KERNEL_DS)
 

arch/sh/include/asm/uaccess.h

@@ -60,7 +60,7 @@ struct __large_struct { unsigned long buf[100]; };
 	const __typeof__(*(ptr)) __user *__gu_addr = (ptr);	\
 	__chk_user_ptr(ptr);					\
 	__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;			\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;		\
 	__gu_err;						\
 })
 
@@ -71,7 +71,7 @@ struct __large_struct { unsigned long buf[100]; };
 	const __typeof__(*(ptr)) *__gu_addr = (ptr);			\
 	if (likely(access_ok(VERIFY_READ, __gu_addr, (size))))		\
 		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
-	(x) = (__typeof__(*(ptr)))__gu_val;				\
+	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;							\
 })
 

arch/sh/include/asm/uaccess_64.h

@@ -59,19 +59,19 @@ do {								\
 	switch (size) {						\
 	case 1:							\
 		retval = __put_user_asm_b((void *)&x,		\
-					  (long)ptr);		\
+					  (__force long)ptr);	\
 		break;						\
 	case 2:							\
 		retval = __put_user_asm_w((void *)&x,		\
-					  (long)ptr);		\
+					  (__force long)ptr);	\
 		break;						\
 	case 4:							\
 		retval = __put_user_asm_l((void *)&x,		\
-					  (long)ptr);		\
+					  (__force long)ptr);	\
 		break;						\
 	case 8:							\
 		retval = __put_user_asm_q((void *)&x,		\
-					  (long)ptr);		\
+					  (__force long)ptr);	\
 		break;						\
 	default:						\
 		__put_user_unknown();				\

arch/sparc/include/asm/uaccess_64.h

@@ -41,11 +41,11 @@
 #define get_fs() ((mm_segment_t){(current_thread_info()->current_ds)})
 #define get_ds() (KERNEL_DS)
 
-#define segment_eq(a,b)  ((a).seg == (b).seg)
+#define segment_eq(a, b)  ((a).seg == (b).seg)
 
 #define set_fs(val)								\
 do {										\
-	current_thread_info()->current_ds =(val).seg;				\
+	current_thread_info()->current_ds = (val).seg;				\
 	__asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg));	\
 } while(0)
 
@@ -88,41 +88,45 @@ void __retl_efault(void);
  * of a performance impact. Thus we have a few rather ugly macros here,
  * and hide all the ugliness from the user.
  */
-#define put_user(x,ptr) ({ \
-unsigned long __pu_addr = (unsigned long)(ptr); \
-__chk_user_ptr(ptr); \
-__put_user_nocheck((__typeof__(*(ptr)))(x),__pu_addr,sizeof(*(ptr))); })
+#define put_user(x, ptr) ({ \
+	unsigned long __pu_addr = (unsigned long)(ptr); \
+	__chk_user_ptr(ptr); \
+	__put_user_nocheck((__typeof__(*(ptr)))(x), __pu_addr, sizeof(*(ptr)));\
+})
 
-#define get_user(x,ptr) ({ \
-unsigned long __gu_addr = (unsigned long)(ptr); \
-__chk_user_ptr(ptr); \
-__get_user_nocheck((x),__gu_addr,sizeof(*(ptr)),__typeof__(*(ptr))); })
+#define get_user(x, ptr) ({ \
+	unsigned long __gu_addr = (unsigned long)(ptr); \
+	__chk_user_ptr(ptr); \
+	__get_user_nocheck((x), __gu_addr, sizeof(*(ptr)), __typeof__(*(ptr)));\
+})
 
-#define __put_user(x,ptr) put_user(x,ptr)
-#define __get_user(x,ptr) get_user(x,ptr)
+#define __put_user(x, ptr) put_user(x, ptr)
+#define __get_user(x, ptr) get_user(x, ptr)
 
 struct __large_struct { unsigned long buf[100]; };
 #define __m(x) ((struct __large_struct *)(x))
 
-#define __put_user_nocheck(data,addr,size) ({ \
-register int __pu_ret; \
-switch (size) { \
-case 1: __put_user_asm(data,b,addr,__pu_ret); break; \
-case 2: __put_user_asm(data,h,addr,__pu_ret); break; \
-case 4: __put_user_asm(data,w,addr,__pu_ret); break; \
-case 8: __put_user_asm(data,x,addr,__pu_ret); break; \
-default: __pu_ret = __put_user_bad(); break; \
-} __pu_ret; })
-
-#define __put_user_asm(x,size,addr,ret)					\
+#define __put_user_nocheck(data, addr, size) ({			\
+	register int __pu_ret;					\
+	switch (size) {						\
+	case 1: __put_user_asm(data, b, addr, __pu_ret); break;	\
+	case 2: __put_user_asm(data, h, addr, __pu_ret); break;	\
+	case 4: __put_user_asm(data, w, addr, __pu_ret); break;	\
+	case 8: __put_user_asm(data, x, addr, __pu_ret); break;	\
+	default: __pu_ret = __put_user_bad(); break;		\
+	}							\
+	__pu_ret;						\
+})
+
+#define __put_user_asm(x, size, addr, ret)				\
 __asm__ __volatile__(							\
 		"/* Put user asm, inline. */\n"				\
-"1:\t"	"st"#size "a %1, [%2] %%asi\n\t"				\
+	"1:\t"	"st"#size "a %1, [%2] %%asi\n\t"			\
 		"clr	%0\n"						\
-"2:\n\n\t"								\
+	"2:\n\n\t"							\
 		".section .fixup,#alloc,#execinstr\n\t"			\
 		".align	4\n"						\
-"3:\n\t"								\
+	"3:\n\t"							\
 		"sethi	%%hi(2b), %0\n\t"				\
 		"jmpl	%0 + %%lo(2b), %%g0\n\t"			\
 		" mov	%3, %0\n\n\t"					\
@@ -136,36 +140,46 @@ __asm__ __volatile__(							\
 
 int __put_user_bad(void);
 
-#define __get_user_nocheck(data,addr,size,type) ({ \
-register int __gu_ret; \
-register unsigned long __gu_val; \
-switch (size) { \
-case 1: __get_user_asm(__gu_val,ub,addr,__gu_ret); break; \
-case 2: __get_user_asm(__gu_val,uh,addr,__gu_ret); break; \
-case 4: __get_user_asm(__gu_val,uw,addr,__gu_ret); break; \
-case 8: __get_user_asm(__gu_val,x,addr,__gu_ret); break; \
-default: __gu_val = 0; __gu_ret = __get_user_bad(); break; \
-} data = (type) __gu_val; __gu_ret; })
-
-#define __get_user_nocheck_ret(data,addr,size,type,retval) ({ \
-register unsigned long __gu_val __asm__ ("l1"); \
-switch (size) { \
-case 1: __get_user_asm_ret(__gu_val,ub,addr,retval); break; \
-case 2: __get_user_asm_ret(__gu_val,uh,addr,retval); break; \
-case 4: __get_user_asm_ret(__gu_val,uw,addr,retval); break; \
-case 8: __get_user_asm_ret(__gu_val,x,addr,retval); break; \
-default: if (__get_user_bad()) return retval; \
-} data = (type) __gu_val; })
-
-#define __get_user_asm(x,size,addr,ret)					\
+#define __get_user_nocheck(data, addr, size, type) ({			     \
+	register int __gu_ret;						     \
+	register unsigned long __gu_val;				     \
+	switch (size) {							     \
+		case 1: __get_user_asm(__gu_val, ub, addr, __gu_ret); break; \
+		case 2: __get_user_asm(__gu_val, uh, addr, __gu_ret); break; \
+		case 4: __get_user_asm(__gu_val, uw, addr, __gu_ret); break; \
+		case 8: __get_user_asm(__gu_val, x, addr, __gu_ret); break;  \
+		default:						     \
+			__gu_val = 0;					     \
+			__gu_ret = __get_user_bad();			     \
+			break;						     \
+	} 								     \
+	data = (__force type) __gu_val;					     \
+	 __gu_ret;							     \
+})
+
+#define __get_user_nocheck_ret(data, addr, size, type, retval) ({	\
+	register unsigned long __gu_val __asm__ ("l1");			\
+	switch (size) {							\
+	case 1: __get_user_asm_ret(__gu_val, ub, addr, retval); break;	\
+	case 2: __get_user_asm_ret(__gu_val, uh, addr, retval); break;	\
+	case 4: __get_user_asm_ret(__gu_val, uw, addr, retval); break;	\
+	case 8: __get_user_asm_ret(__gu_val, x, addr, retval); break;	\
+	default:							\
+		if (__get_user_bad())					\
+			return retval;					\
+	}								\
+	data = (__force type) __gu_val;					\
+})
+
+#define __get_user_asm(x, size, addr, ret)				\
 __asm__ __volatile__(							\
 		"/* Get user asm, inline. */\n"				\
-"1:\t"	"ld"#size "a [%2] %%asi, %1\n\t"				\
+	"1:\t"	"ld"#size "a [%2] %%asi, %1\n\t"			\
 		"clr	%0\n"						\
-"2:\n\n\t"								\
+	"2:\n\n\t"							\
 		".section .fixup,#alloc,#execinstr\n\t"			\
 		".align	4\n"						\
-"3:\n\t"								\
+	"3:\n\t"							\
 		"sethi	%%hi(2b), %0\n\t"				\
 		"clr	%1\n\t"						\
 		"jmpl	%0 + %%lo(2b), %%g0\n\t"			\
@@ -178,23 +192,23 @@ __asm__ __volatile__(							\
 	       : "=r" (ret), "=r" (x) : "r" (__m(addr)),		\
 		 "i" (-EFAULT))
 
-#define __get_user_asm_ret(x,size,addr,retval)				\
+#define __get_user_asm_ret(x, size, addr, retval)			\
 if (__builtin_constant_p(retval) && retval == -EFAULT)			\
-__asm__ __volatile__(							\
+	__asm__ __volatile__(						\
 		"/* Get user asm ret, inline. */\n"			\
-"1:\t"	"ld"#size "a [%1] %%asi, %0\n\n\t"				\
+	"1:\t"	"ld"#size "a [%1] %%asi, %0\n\n\t"			\
 		".section __ex_table,\"a\"\n\t"				\
 		".align	4\n\t"						\
 		".word	1b,__ret_efault\n\n\t"				\
 		".previous\n\t"						\
 	       : "=r" (x) : "r" (__m(addr)));				\
 else									\
-__asm__ __volatile__(							\
+	__asm__ __volatile__(						\
 		"/* Get user asm ret, inline. */\n"			\
-"1:\t"	"ld"#size "a [%1] %%asi, %0\n\n\t"				\
+	"1:\t"	"ld"#size "a [%1] %%asi, %0\n\n\t"			\
 		".section .fixup,#alloc,#execinstr\n\t"			\
 		".align	4\n"						\
-"3:\n\t"								\
+	"3:\n\t"							\
 		"ret\n\t"						\
 		" restore %%g0, %2, %%o0\n\n\t"				\
 		".previous\n\t"						\

arch/x86/include/asm/uaccess.h

@@ -179,7 +179,7 @@ __typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL))
 	asm volatile("call __get_user_%P3"				\
 		     : "=a" (__ret_gu), "=r" (__val_gu)			\
 		     : "0" (ptr), "i" (sizeof(*(ptr))));		\
-	(x) = (__typeof__(*(ptr))) __val_gu;				\
+	(x) = (__force __typeof__(*(ptr))) __val_gu;			\
 	__ret_gu;							\
 })
 

arch/xtensa/include/asm/uaccess.h

@@ -182,13 +182,13 @@
 #define get_fs()	(current->thread.current_ds)
 #define set_fs(val)	(current->thread.current_ds = (val))
 
-#define segment_eq(a,b)	((a).seg == (b).seg)
+#define segment_eq(a, b)	((a).seg == (b).seg)
 
 #define __kernel_ok (segment_eq(get_fs(), KERNEL_DS))
-#define __user_ok(addr,size) \
+#define __user_ok(addr, size) \
 		(((size) <= TASK_SIZE)&&((addr) <= TASK_SIZE-(size)))
-#define __access_ok(addr,size) (__kernel_ok || __user_ok((addr),(size)))
-#define access_ok(type,addr,size) __access_ok((unsigned long)(addr),(size))
+#define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size)))
+#define access_ok(type, addr, size) __access_ok((unsigned long)(addr), (size))
 
 /*
  * These are the main single-value transfer routines.  They
@@ -204,8 +204,8 @@
  * (a) re-use the arguments for side effects (sizeof is ok)
  * (b) require any knowledge of processes at this stage
  */
-#define put_user(x,ptr)	__put_user_check((x),(ptr),sizeof(*(ptr)))
-#define get_user(x,ptr) __get_user_check((x),(ptr),sizeof(*(ptr)))
+#define put_user(x, ptr)	__put_user_check((x), (ptr), sizeof(*(ptr)))
+#define get_user(x, ptr) __get_user_check((x), (ptr), sizeof(*(ptr)))
 
 /*
  * The "__xxx" versions of the user access functions are versions that
@@ -213,39 +213,39 @@
  * with a separate "access_ok()" call (this is used when we do multiple
  * accesses to the same area of user memory).
  */
-#define __put_user(x,ptr) __put_user_nocheck((x),(ptr),sizeof(*(ptr)))
-#define __get_user(x,ptr) __get_user_nocheck((x),(ptr),sizeof(*(ptr)))
+#define __put_user(x, ptr) __put_user_nocheck((x), (ptr), sizeof(*(ptr)))
+#define __get_user(x, ptr) __get_user_nocheck((x), (ptr), sizeof(*(ptr)))
 
 
 extern long __put_user_bad(void);
 
-#define __put_user_nocheck(x,ptr,size)			\
+#define __put_user_nocheck(x, ptr, size)		\
 ({							\
 	long __pu_err;					\
-	__put_user_size((x),(ptr),(size),__pu_err);	\
+	__put_user_size((x), (ptr), (size), __pu_err);	\
 	__pu_err;					\
 })
 
-#define __put_user_check(x,ptr,size)				\
+#define __put_user_check(x, ptr, size)					\
 ({									\
 	long __pu_err = -EFAULT;					\
 	__typeof__(*(ptr)) *__pu_addr = (ptr);				\
-	if (access_ok(VERIFY_WRITE,__pu_addr,size))		\
-		__put_user_size((x),__pu_addr,(size),__pu_err);	\
+	if (access_ok(VERIFY_WRITE, __pu_addr, size))			\
+		__put_user_size((x), __pu_addr, (size), __pu_err);	\
 	__pu_err;							\
 })
 
-#define __put_user_size(x,ptr,size,retval)				\
+#define __put_user_size(x, ptr, size, retval)				\
 do {									\
 	int __cb;							\
 	retval = 0;							\
 	switch (size) {							\
-	case 1: __put_user_asm(x,ptr,retval,1,"s8i",__cb);  break;	\
-	case 2: __put_user_asm(x,ptr,retval,2,"s16i",__cb); break;	\
-	case 4: __put_user_asm(x,ptr,retval,4,"s32i",__cb); break;	\
+	case 1: __put_user_asm(x, ptr, retval, 1, "s8i", __cb);  break;	\
+	case 2: __put_user_asm(x, ptr, retval, 2, "s16i", __cb); break;	\
+	case 4: __put_user_asm(x, ptr, retval, 4, "s32i", __cb); break;	\
 	case 8: {							\
 		     __typeof__(*ptr) __v64 = x;			\
-		     retval = __copy_to_user(ptr,&__v64,8);		\
+		     retval = __copy_to_user(ptr, &__v64, 8);		\
 		     break;						\
 	        }							\
 	default: __put_user_bad();					\
@@ -316,35 +316,35 @@ __asm__ __volatile__(					\
 	:"=r" (err), "=r" (cb)				\
 	:"r" ((int)(x)), "r" (addr), "i" (-EFAULT), "0" (err))
 
-#define __get_user_nocheck(x,ptr,size)				\
+#define __get_user_nocheck(x, ptr, size)			\
 ({								\
 	long __gu_err, __gu_val;				\
-	__get_user_size(__gu_val,(ptr),(size),__gu_err);	\
+	__get_user_size(__gu_val, (ptr), (size), __gu_err);	\
 	(x) = (__force __typeof__(*(ptr)))__gu_val;		\
 	__gu_err;						\
 })
 
-#define __get_user_check(x,ptr,size)					\
+#define __get_user_check(x, ptr, size)					\
 ({									\
 	long __gu_err = -EFAULT, __gu_val = 0;				\
 	const __typeof__(*(ptr)) *__gu_addr = (ptr);			\
-	if (access_ok(VERIFY_READ,__gu_addr,size))			\
-		__get_user_size(__gu_val,__gu_addr,(size),__gu_err);	\
+	if (access_ok(VERIFY_READ, __gu_addr, size))			\
+		__get_user_size(__gu_val, __gu_addr, (size), __gu_err);	\
 	(x) = (__force __typeof__(*(ptr)))__gu_val;			\
 	__gu_err;							\
 })
 
 extern long __get_user_bad(void);
 
-#define __get_user_size(x,ptr,size,retval)				\
+#define __get_user_size(x, ptr, size, retval)				\
 do {									\
 	int __cb;							\
 	retval = 0;							\
 	switch (size) {							\
-	case 1: __get_user_asm(x,ptr,retval,1,"l8ui",__cb);  break;	\
-	case 2: __get_user_asm(x,ptr,retval,2,"l16ui",__cb); break;	\
-	case 4: __get_user_asm(x,ptr,retval,4,"l32i",__cb);  break;	\
-	case 8: retval = __copy_from_user(&x,ptr,8);    break;	\
+	case 1: __get_user_asm(x, ptr, retval, 1, "l8ui", __cb);  break;\
+	case 2: __get_user_asm(x, ptr, retval, 2, "l16ui", __cb); break;\
+	case 4: __get_user_asm(x, ptr, retval, 4, "l32i", __cb);  break;\
+	case 8: retval = __copy_from_user(&x, ptr, 8);    break;	\
 	default: (x) = __get_user_bad();				\
 	}								\
 } while (0)
@@ -390,19 +390,19 @@ __asm__ __volatile__(			\
  */
 
 extern unsigned __xtensa_copy_user(void *to, const void *from, unsigned n);
-#define __copy_user(to,from,size) __xtensa_copy_user(to,from,size)
+#define __copy_user(to, from, size) __xtensa_copy_user(to, from, size)
 
 
 static inline unsigned long
 __generic_copy_from_user_nocheck(void *to, const void *from, unsigned long n)
 {
-	return __copy_user(to,from,n);
+	return __copy_user(to, from, n);
 }
 
 static inline unsigned long
 __generic_copy_to_user_nocheck(void *to, const void *from, unsigned long n)
 {
-	return __copy_user(to,from,n);
+	return __copy_user(to, from, n);
 }
 
 static inline unsigned long
@@ -410,7 +410,7 @@ __generic_copy_to_user(void *to, const void *from, unsigned long n)
 {
 	prefetch(from);
 	if (access_ok(VERIFY_WRITE, to, n))
-		return __copy_user(to,from,n);
+		return __copy_user(to, from, n);
 	return n;
 }
 
@@ -419,18 +419,18 @@ __generic_copy_from_user(void *to, const void *from, unsigned long n)
 {
 	prefetchw(to);
 	if (access_ok(VERIFY_READ, from, n))
-		return __copy_user(to,from,n);
+		return __copy_user(to, from, n);
 	else
 		memset(to, 0, n);
 	return n;
 }
 
-#define copy_to_user(to,from,n) __generic_copy_to_user((to),(from),(n))
-#define copy_from_user(to,from,n) __generic_copy_from_user((to),(from),(n))
-#define __copy_to_user(to,from,n) \
-	__generic_copy_to_user_nocheck((to),(from),(n))
-#define __copy_from_user(to,from,n) \
-	__generic_copy_from_user_nocheck((to),(from),(n))
+#define copy_to_user(to, from, n) __generic_copy_to_user((to), (from), (n))
+#define copy_from_user(to, from, n) __generic_copy_from_user((to), (from), (n))
+#define __copy_to_user(to, from, n) \
+	__generic_copy_to_user_nocheck((to), (from), (n))
+#define __copy_from_user(to, from, n) \
+	__generic_copy_from_user_nocheck((to), (from), (n))
 #define __copy_to_user_inatomic __copy_to_user
 #define __copy_from_user_inatomic __copy_from_user