[deliverable/linux.git] / include / asm-sparc64 / uaccess.h

/* $Id: uaccess.h,v 1.35 2002/02/09 19:49:31 davem Exp $ */
#ifndef _ASM_UACCESS_H
#define _ASM_UACCESS_H

/*
 * User space memory access functions
 */

#ifdef __KERNEL__
#include <linux/compiler.h>
#include <linux/sched.h>
#include <linux/string.h>
#include <asm/a.out.h>
#include <asm/asi.h>
#include <asm/system.h>
#include <asm/spitfire.h>
#include <asm-generic/uaccess.h>
#endif

#ifndef __ASSEMBLY__

/*
 * Sparc64 is segmented, though more like the M68K than the I386. 
 * We use the secondary ASI to address user memory, which references a
 * completely different VM map, thus there is zero chance of the user
 * doing something queer and tricking us into poking kernel memory.
 *
 * What is left here is basically what is needed for the other parts of
 * the kernel that expect to be able to manipulate, erum, "segments".
 * Or perhaps more properly, permissions.
 *
 * "For historical reasons, these macros are grossly misnamed." -Linus
 */

#define KERNEL_DS   ((mm_segment_t) { ASI_P })
#define USER_DS     ((mm_segment_t) { ASI_AIUS })	/* har har har */

#define VERIFY_READ	0
#define VERIFY_WRITE	1

#define get_fs() ((mm_segment_t) { get_thread_current_ds() })
#define get_ds() (KERNEL_DS)

#define segment_eq(a,b)  ((a).seg == (b).seg)

#define set_fs(val)								\
do {										\
	set_thread_current_ds((val).seg);					\
	__asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg));	\
} while(0)

static inline int __access_ok(const void __user * addr, unsigned long size)
{
	return 1;
}

static inline int access_ok(int type, const void __user * addr, unsigned long size)
{
	return 1;
}

/*
 * The exception table consists of pairs of addresses: the first is the
 * address of an instruction that is allowed to fault, and the second is
 * the address at which the program should continue.  No registers are
 * modified, so it is entirely up to the continuation code to figure out
 * what to do.
 *
 * All the routines below use bits of fixup code that are out of line
 * with the main instruction path.  This means when everything is well,
 * we don't even have to jump over them.  Further, they do not intrude
 * on our cache or tlb entries.
 */

struct exception_table_entry {
        unsigned int insn, fixup;
};

extern void __ret_efault(void);
extern void __retl_efault(void);

/* Uh, these should become the main single-value transfer routines..
 * They automatically use the right size if we just have the right
 * pointer type..
 *
 * This gets kind of ugly. We want to return _two_ values in "get_user()"
 * and yet we don't want to do any pointers, because that is too much
 * 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 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)

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_nocheck_ret(data,addr,size,retval) ({ \
register int __foo __asm__ ("l1"); \
switch (size) { \
case 1: __put_user_asm_ret(data,b,addr,retval,__foo); break; \
case 2: __put_user_asm_ret(data,h,addr,retval,__foo); break; \
case 4: __put_user_asm_ret(data,w,addr,retval,__foo); break; \
case 8: __put_user_asm_ret(data,x,addr,retval,__foo); break; \
default: if (__put_user_bad()) return retval; break; \
} })

#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"				\
	"clr	%0\n"							\
"2:\n\n\t"								\
	".section .fixup,#alloc,#execinstr\n\t"				\
	".align	4\n"							\
"3:\n\t"								\
	"b	2b\n\t"							\
	" mov	%3, %0\n\n\t"						\
	".previous\n\t"							\
	".section __ex_table,\"a\"\n\t"					\
	".align	4\n\t"							\
	".word	1b, 3b\n\t"						\
	".previous\n\n\t"						\
       : "=r" (ret) : "r" (x), "r" (__m(addr)),				\
	 "i" (-EFAULT))

#define __put_user_asm_ret(x,size,addr,ret,foo)				\
if (__builtin_constant_p(ret) && ret == -EFAULT)			\
__asm__ __volatile__(							\
	"/* Put user asm ret, inline. */\n"				\
"1:\t"	"st"#size "a %1, [%2] %%asi\n\n\t"				\
	".section __ex_table,\"a\"\n\t"					\
	".align	4\n\t"							\
	".word	1b, __ret_efault\n\n\t"					\
	".previous\n\n\t"						\
       : "=r" (foo) : "r" (x), "r" (__m(addr)));			\
else									\
__asm__ __volatile__(							\
	"/* Put user asm ret, inline. */\n"				\
"1:\t"	"st"#size "a %1, [%2] %%asi\n\n\t"				\
	".section .fixup,#alloc,#execinstr\n\t"				\
	".align	4\n"							\
"3:\n\t"								\
	"ret\n\t"							\
	" restore %%g0, %3, %%o0\n\n\t"					\
	".previous\n\t"							\
	".section __ex_table,\"a\"\n\t"					\
	".align	4\n\t"							\
	".word	1b, 3b\n\n\t"						\
	".previous\n\n\t"						\
       : "=r" (foo) : "r" (x), "r" (__m(addr)),				\
         "i" (ret))

extern 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)					\
__asm__ __volatile__(							\
	"/* Get user asm, inline. */\n"					\
"1:\t"	"ld"#size "a [%2] %%asi, %1\n\t"				\
	"clr	%0\n"							\
"2:\n\n\t"								\
	".section .fixup,#alloc,#execinstr\n\t"				\
	".align	4\n"							\
"3:\n\t"								\
	"clr	%1\n\t"							\
	"b	2b\n\t"							\
	" mov	%3, %0\n\n\t"						\
	".previous\n\t"							\
	".section __ex_table,\"a\"\n\t"					\
	".align	4\n\t"							\
	".word	1b, 3b\n\n\t"						\
	".previous\n\t"							\
       : "=r" (ret), "=r" (x) : "r" (__m(addr)),			\
	 "i" (-EFAULT))

#define __get_user_asm_ret(x,size,addr,retval)				\
if (__builtin_constant_p(retval) && retval == -EFAULT)			\
__asm__ __volatile__(							\
	"/* Get user asm ret, inline. */\n"				\
"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__(							\
	"/* Get user asm ret, inline. */\n"				\
"1:\t"	"ld"#size "a [%1] %%asi, %0\n\n\t"				\
	".section .fixup,#alloc,#execinstr\n\t"				\
	".align	4\n"							\
"3:\n\t"								\
	"ret\n\t"							\
	" restore %%g0, %2, %%o0\n\n\t"					\
	".previous\n\t"							\
	".section __ex_table,\"a\"\n\t"					\
	".align	4\n\t"							\
	".word	1b, 3b\n\n\t"						\
	".previous\n\t"							\
       : "=r" (x) : "r" (__m(addr)), "i" (retval))

extern int __get_user_bad(void);

extern unsigned long __must_check ___copy_from_user(void *to,
						    const void __user *from,
						    unsigned long size);
extern unsigned long copy_from_user_fixup(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)
{
	unsigned long ret = ___copy_from_user(to, from, size);

	if (unlikely(ret))
		ret = copy_from_user_fixup(to, from, size);
	return ret;
}
#define __copy_from_user copy_from_user

extern unsigned long __must_check ___copy_to_user(void __user *to,
						  const void *from,
						  unsigned long size);
extern unsigned long copy_to_user_fixup(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)
{
	unsigned long ret = ___copy_to_user(to, from, size);

	if (unlikely(ret))
		ret = copy_to_user_fixup(to, from, size);
	return ret;
}
#define __copy_to_user copy_to_user

extern unsigned long __must_check ___copy_in_user(void __user *to,
						  const void __user *from,
						  unsigned long size);
extern unsigned long copy_in_user_fixup(void __user *to, void __user *from,
					unsigned long size);
static inline unsigned long __must_check
copy_in_user(void __user *to, void __user *from, unsigned long size)
{
	unsigned long ret = ___copy_in_user(to, from, size);

	if (unlikely(ret))
		ret = copy_in_user_fixup(to, from, size);
	return ret;
}
#define __copy_in_user copy_in_user

extern unsigned long __must_check __bzero_noasi(void __user *, unsigned long);

static inline unsigned long __must_check
__clear_user(void __user *addr, unsigned long size)
{
	
	return __bzero_noasi(addr, size);
}

#define clear_user __clear_user

extern long __must_check __strncpy_from_user(char *dest, const char __user *src, long count);

#define strncpy_from_user __strncpy_from_user

extern long __strlen_user(const char __user *);
extern long __strnlen_user(const char __user *, long len);

#define strlen_user __strlen_user
#define strnlen_user __strnlen_user
#define __copy_to_user_inatomic __copy_to_user
#define __copy_from_user_inatomic __copy_from_user

#endif  /* __ASSEMBLY__ */

#endif /* _ASM_UACCESS_H */
Commit	Line	Data
1da177e4 LT	1	/* $Id: uaccess.h,v 1.35 2002/02/09 19:49:31 davem Exp $ */
	2	#ifndef _ASM_UACCESS_H
	3	#define _ASM_UACCESS_H
	4
	5	/*
	6	* User space memory access functions
	7	*/
	8
	9	#ifdef __KERNEL__
	10	#include <linux/compiler.h>
	11	#include <linux/sched.h>
	12	#include <linux/string.h>
	13	#include <asm/a.out.h>
	14	#include <asm/asi.h>
	15	#include <asm/system.h>
	16	#include <asm/spitfire.h>
	17	#include <asm-generic/uaccess.h>
	18	#endif
	19
	20	#ifndef __ASSEMBLY__
	21
	22	/*
	23	* Sparc64 is segmented, though more like the M68K than the I386.
	24	* We use the secondary ASI to address user memory, which references a
	25	* completely different VM map, thus there is zero chance of the user
	26	* doing something queer and tricking us into poking kernel memory.
	27	*
	28	* What is left here is basically what is needed for the other parts of
	29	* the kernel that expect to be able to manipulate, erum, "segments".
	30	* Or perhaps more properly, permissions.
	31	*
	32	* "For historical reasons, these macros are grossly misnamed." -Linus
	33	*/
	34
	35	#define KERNEL_DS ((mm_segment_t) { ASI_P })
	36	#define USER_DS ((mm_segment_t) { ASI_AIUS }) /* har har har */
	37
	38	#define VERIFY_READ 0
	39	#define VERIFY_WRITE 1
	40
	41	#define get_fs() ((mm_segment_t) { get_thread_current_ds() })
	42	#define get_ds() (KERNEL_DS)
	43
	44	#define segment_eq(a,b) ((a).seg == (b).seg)
	45
	46	#define set_fs(val) \
	47	do { \
	48	set_thread_current_ds((val).seg); \
	49	__asm__ __volatile__ ("wr %%g0, %0, %%asi" : : "r" ((val).seg)); \
	50	} while(0)
	51
	52	static inline int __access_ok(const void __user * addr, unsigned long size)
	53	{
	54	return 1;
	55	}
	56
	57	static inline int access_ok(int type, const void __user * addr, unsigned long size)
	58	{
	59	return 1;
	60	}
	61
1da177e4 LT	62	/*
	63	* The exception table consists of pairs of addresses: the first is the
	64	* address of an instruction that is allowed to fault, and the second is
	65	* the address at which the program should continue. No registers are
	66	* modified, so it is entirely up to the continuation code to figure out
	67	* what to do.
	68	*
	69	* All the routines below use bits of fixup code that are out of line
	70	* with the main instruction path. This means when everything is well,
	71	* we don't even have to jump over them. Further, they do not intrude
	72	* on our cache or tlb entries.
1da177e4 LT	73	*/
1da177e4 LT	74
8cf14af0 DM	75	struct exception_table_entry {
8cf14af0 DM	76	unsigned int insn, fixup;
1da177e4 LT	77	};
1da177e4 LT	78
1da177e4	79	extern void __ret_efault(void);
5fd29752	80	extern void __retl_efault(void);
1da177e4 LT	81
	82	/* Uh, these should become the main single-value transfer routines..
	83	* They automatically use the right size if we just have the right
	84	* pointer type..
	85	*
	86	* This gets kind of ugly. We want to return _two_ values in "get_user()"
	87	* and yet we don't want to do any pointers, because that is too much
	88	* of a performance impact. Thus we have a few rather ugly macros here,
	89	* and hide all the ugliness from the user.
	90	*/
	91	#define put_user(x,ptr) ({ \
	92	unsigned long __pu_addr = (unsigned long)(ptr); \
	93	__chk_user_ptr(ptr); \
	94	__put_user_nocheck((__typeof__((ptr)))(x),__pu_addr,sizeof((ptr))); })
	95
	96	#define get_user(x,ptr) ({ \
	97	unsigned long __gu_addr = (unsigned long)(ptr); \
	98	__chk_user_ptr(ptr); \
	99	__get_user_nocheck((x),__gu_addr,sizeof((ptr)),__typeof__((ptr))); })
	100
	101	#define __put_user(x,ptr) put_user(x,ptr)
	102	#define __get_user(x,ptr) get_user(x,ptr)
	103
	104	struct __large_struct { unsigned long buf[100]; };
	105	#define __m(x) ((struct __large_struct *)(x))
	106
	107	#define __put_user_nocheck(data,addr,size) ({ \
	108	register int __pu_ret; \
	109	switch (size) { \
	110	case 1: __put_user_asm(data,b,addr,__pu_ret); break; \
	111	case 2: __put_user_asm(data,h,addr,__pu_ret); break; \
	112	case 4: __put_user_asm(data,w,addr,__pu_ret); break; \
	113	case 8: __put_user_asm(data,x,addr,__pu_ret); break; \
	114	default: __pu_ret = __put_user_bad(); break; \
	115	} __pu_ret; })
	116
	117	#define __put_user_nocheck_ret(data,addr,size,retval) ({ \
	118	register int __foo __asm__ ("l1"); \
	119	switch (size) { \
	120	case 1: __put_user_asm_ret(data,b,addr,retval,__foo); break; \
	121	case 2: __put_user_asm_ret(data,h,addr,retval,__foo); break; \
	122	case 4: __put_user_asm_ret(data,w,addr,retval,__foo); break; \
	123	case 8: __put_user_asm_ret(data,x,addr,retval,__foo); break; \
	124	default: if (__put_user_bad()) return retval; break; \
	125	} })
	126
	127	#define __put_user_asm(x,size,addr,ret) \
	128	__asm__ __volatile__( \
	129	"/* Put user asm, inline. */\n" \
	130	"1:\t" "st"#size "a %1, [%2] %%asi\n\t" \
	131	"clr %0\n" \
	132	"2:\n\n\t" \
	133	".section .fixup,#alloc,#execinstr\n\t" \
	134	".align 4\n" \
	135	"3:\n\t" \
	136	"b 2b\n\t" \
	137	" mov %3, %0\n\n\t" \
	138	".previous\n\t" \
4d000d5b	139	".section __ex_table,\"a\"\n\t" \
1da177e4 LT	140	".align 4\n\t" \
	141	".word 1b, 3b\n\t" \
	142	".previous\n\n\t" \
	143	: "=r" (ret) : "r" (x), "r" (__m(addr)), \
	144	"i" (-EFAULT))
	145
	146	#define __put_user_asm_ret(x,size,addr,ret,foo) \
	147	if (__builtin_constant_p(ret) && ret == -EFAULT) \
	148	__asm__ __volatile__( \
	149	"/* Put user asm ret, inline. */\n" \
	150	"1:\t" "st"#size "a %1, [%2] %%asi\n\n\t" \
4d000d5b	151	".section __ex_table,\"a\"\n\t" \
1da177e4 LT	152	".align 4\n\t" \
	153	".word 1b, __ret_efault\n\n\t" \
	154	".previous\n\n\t" \
	155	: "=r" (foo) : "r" (x), "r" (__m(addr))); \
	156	else \
	157	__asm__ __volatile__( \
	158	"/* Put user asm ret, inline. */\n" \
	159	"1:\t" "st"#size "a %1, [%2] %%asi\n\n\t" \
	160	".section .fixup,#alloc,#execinstr\n\t" \
	161	".align 4\n" \
	162	"3:\n\t" \
	163	"ret\n\t" \
	164	" restore %%g0, %3, %%o0\n\n\t" \
	165	".previous\n\t" \
4d000d5b	166	".section __ex_table,\"a\"\n\t" \
1da177e4 LT	167	".align 4\n\t" \
	168	".word 1b, 3b\n\n\t" \
	169	".previous\n\n\t" \
	170	: "=r" (foo) : "r" (x), "r" (__m(addr)), \
	171	"i" (ret))
	172
	173	extern int __put_user_bad(void);
	174
	175	#define __get_user_nocheck(data,addr,size,type) ({ \
	176	register int __gu_ret; \
	177	register unsigned long __gu_val; \
	178	switch (size) { \
	179	case 1: __get_user_asm(__gu_val,ub,addr,__gu_ret); break; \
	180	case 2: __get_user_asm(__gu_val,uh,addr,__gu_ret); break; \
	181	case 4: __get_user_asm(__gu_val,uw,addr,__gu_ret); break; \
	182	case 8: __get_user_asm(__gu_val,x,addr,__gu_ret); break; \
	183	default: __gu_val = 0; __gu_ret = __get_user_bad(); break; \
	184	} data = (type) __gu_val; __gu_ret; })
	185
	186	#define __get_user_nocheck_ret(data,addr,size,type,retval) ({ \
	187	register unsigned long __gu_val __asm__ ("l1"); \
	188	switch (size) { \
	189	case 1: __get_user_asm_ret(__gu_val,ub,addr,retval); break; \
	190	case 2: __get_user_asm_ret(__gu_val,uh,addr,retval); break; \
	191	case 4: __get_user_asm_ret(__gu_val,uw,addr,retval); break; \
	192	case 8: __get_user_asm_ret(__gu_val,x,addr,retval); break; \
	193	default: if (__get_user_bad()) return retval; \
	194	} data = (type) __gu_val; })
	195
	196	#define __get_user_asm(x,size,addr,ret) \
	197	__asm__ __volatile__( \
	198	"/* Get user asm, inline. */\n" \
	199	"1:\t" "ld"#size "a [%2] %%asi, %1\n\t" \
	200	"clr %0\n" \
	201	"2:\n\n\t" \
	202	".section .fixup,#alloc,#execinstr\n\t" \
	203	".align 4\n" \
	204	"3:\n\t" \
	205	"clr %1\n\t" \
	206	"b 2b\n\t" \
	207	" mov %3, %0\n\n\t" \
	208	".previous\n\t" \
4d000d5b	209	".section __ex_table,\"a\"\n\t" \
1da177e4 LT	210	".align 4\n\t" \
	211	".word 1b, 3b\n\n\t" \
	212	".previous\n\t" \
	213	: "=r" (ret), "=r" (x) : "r" (__m(addr)), \
	214	"i" (-EFAULT))
	215
	216	#define __get_user_asm_ret(x,size,addr,retval) \
	217	if (__builtin_constant_p(retval) && retval == -EFAULT) \
	218	__asm__ __volatile__( \
	219	"/* Get user asm ret, inline. */\n" \
	220	"1:\t" "ld"#size "a [%1] %%asi, %0\n\n\t" \
4d000d5b	221	".section __ex_table,\"a\"\n\t" \
1da177e4 LT	222	".align 4\n\t" \
	223	".word 1b,__ret_efault\n\n\t" \
	224	".previous\n\t" \
	225	: "=r" (x) : "r" (__m(addr))); \
	226	else \
	227	__asm__ __volatile__( \
	228	"/* Get user asm ret, inline. */\n" \
	229	"1:\t" "ld"#size "a [%1] %%asi, %0\n\n\t" \
	230	".section .fixup,#alloc,#execinstr\n\t" \
	231	".align 4\n" \
	232	"3:\n\t" \
	233	"ret\n\t" \
	234	" restore %%g0, %2, %%o0\n\n\t" \
	235	".previous\n\t" \
4d000d5b	236	".section __ex_table,\"a\"\n\t" \
1da177e4 LT	237	".align 4\n\t" \
	238	".word 1b, 3b\n\n\t" \
	239	".previous\n\t" \
	240	: "=r" (x) : "r" (__m(addr)), "i" (retval))
	241
	242	extern int __get_user_bad(void);
	243
	244	extern unsigned long __must_check ___copy_from_user(void *to,
	245	const void __user *from,
	246	unsigned long size);
	247	extern unsigned long copy_from_user_fixup(void to, const void __user from,
	248	unsigned long size);
	249	static inline unsigned long __must_check
	250	copy_from_user(void to, const void __user from, unsigned long size)
	251	{
	252	unsigned long ret = ___copy_from_user(to, from, size);
	253
efdc1e20	254	if (unlikely(ret))
1da177e4 LT	255	ret = copy_from_user_fixup(to, from, size);
	256	return ret;
	257	}
	258	#define __copy_from_user copy_from_user
	259
	260	extern unsigned long __must_check ___copy_to_user(void __user *to,
	261	const void *from,
	262	unsigned long size);
	263	extern unsigned long copy_to_user_fixup(void __user to, const void from,
	264	unsigned long size);
	265	static inline unsigned long __must_check
	266	copy_to_user(void __user to, const void from, unsigned long size)
	267	{
	268	unsigned long ret = ___copy_to_user(to, from, size);
	269
efdc1e20	270	if (unlikely(ret))
1da177e4 LT	271	ret = copy_to_user_fixup(to, from, size);
	272	return ret;
	273	}
	274	#define __copy_to_user copy_to_user
	275
	276	extern unsigned long __must_check ___copy_in_user(void __user *to,
	277	const void __user *from,
	278	unsigned long size);
	279	extern unsigned long copy_in_user_fixup(void __user to, void __user from,
	280	unsigned long size);
	281	static inline unsigned long __must_check
	282	copy_in_user(void __user to, void __user from, unsigned long size)
	283	{
	284	unsigned long ret = ___copy_in_user(to, from, size);
	285
efdc1e20	286	if (unlikely(ret))
1da177e4 LT	287	ret = copy_in_user_fixup(to, from, size);
	288	return ret;
	289	}
	290	#define __copy_in_user copy_in_user
	291
	292	extern unsigned long __must_check __bzero_noasi(void __user *, unsigned long);
	293
	294	static inline unsigned long __must_check
	295	__clear_user(void __user *addr, unsigned long size)
	296	{
	297
	298	return __bzero_noasi(addr, size);
	299	}
	300
	301	#define clear_user __clear_user
	302
	303	extern long __must_check __strncpy_from_user(char dest, const char __user src, long count);
	304
	305	#define strncpy_from_user __strncpy_from_user
	306
	307	extern long __strlen_user(const char __user *);
	308	extern long __strnlen_user(const char __user *, long len);
	309
	310	#define strlen_user __strlen_user
	311	#define strnlen_user __strnlen_user
	312	#define __copy_to_user_inatomic __copy_to_user
	313	#define __copy_from_user_inatomic __copy_from_user
	314
	315	#endif /* __ASSEMBLY__ */
	316
	317	#endif /* _ASM_UACCESS_H */