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nios2: switch to RAW_COPY_USER

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-03-22 13:08:32 -04:00
parent 981db65b52
commit de51d6cc2c
3 changed files with 15 additions and 33 deletions
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1
arch/nios2/Kconfig
View File

@ -16,6 +16,7 @@ config NIOS2
select SPARSE_IRQ
select USB_ARCH_HAS_HCD if USB_SUPPORT
select CPU_NO_EFFICIENT_FFS
select ARCH_HAS_RAW_COPY_USER
config GENERIC_CSUM
def_bool y

31
arch/nios2/include/asm/uaccess.h
View File

@ -73,36 +73,17 @@ static inline unsigned long __must_check clear_user(void __user *to,
return __clear_user(to, n);
}
extern long __copy_from_user(void *to, const void __user *from,
unsigned long n);
extern long __copy_to_user(void __user *to, const void *from, unsigned long n);
static inline long copy_from_user(void *to, const void __user *from,
unsigned long n)
{
unsigned long res = n;
if (access_ok(VERIFY_READ, from, n))
res = __copy_from_user(to, from, n);
if (unlikely(res))
memset(to + (n - res), 0, res);
return res;
}
static inline long copy_to_user(void __user *to, const void *from,
unsigned long n)
{
if (!access_ok(VERIFY_WRITE, to, n))
return n;
return __copy_to_user(to, from, n);
}
extern unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n);
extern unsigned long
raw_copy_to_user(void __user *to, const void *from, unsigned long n);
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER
extern long strncpy_from_user(char *__to, const char __user *__from,
long __len);
extern long strnlen_user(const char __user *s, long n);
#define __copy_from_user_inatomic __copy_from_user
#define __copy_to_user_inatomic __copy_to_user
/* Optimized macros */
#define __get_user_asm(val, insn, addr, err) \
{ \

16
arch/nios2/mm/uaccess.c
View File

@ -10,9 +10,9 @@
#include <linux/export.h>
#include <linux/uaccess.h>
asm(".global __copy_from_user\n"
" .type __copy_from_user, @function\n"
"__copy_from_user:\n"
asm(".global raw_copy_from_user\n"
" .type raw_copy_from_user, @function\n"
"raw_copy_from_user:\n"
" movi r2,7\n"
" mov r3,r4\n"
" bge r2,r6,1f\n"
@ -65,12 +65,12 @@ asm(".global __copy_from_user\n"
".word 7b,13b\n"
".previous\n"
);
EXPORT_SYMBOL(__copy_from_user);
EXPORT_SYMBOL(raw_copy_from_user);
asm(
" .global __copy_to_user\n"
" .type __copy_to_user, @function\n"
"__copy_to_user:\n"
" .global raw_copy_to_user\n"
" .type raw_copy_to_user, @function\n"
"raw_copy_to_user:\n"
" movi r2,7\n"
" mov r3,r4\n"
" bge r2,r6,1f\n"
@ -127,7 +127,7 @@ asm(
".word 11b,13b\n"
".word 12b,13b\n"
".previous\n");
EXPORT_SYMBOL(__copy_to_user);
EXPORT_SYMBOL(raw_copy_to_user);
long strncpy_from_user(char *__to, const char __user *__from, long __len)
{