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microblaze: uaccess: Fix strncpy_from_user function

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Generic implementation for noMMU and MMU version

Signed-off-by: Michal Simek <monstr@monstr.eu>
This commit is contained in:
Michal Simek 2010-03-08 09:38:02 +01:00
parent 4270690bd4
commit 40e11e3380
1 changed files with 11 additions and 3 deletions
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14
arch/microblaze/include/asm/uaccess.h
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@ -407,11 +407,19 @@ static inline long copy_to_user(void __user *to,
}
extern int __strncpy_user(char *to, const char __user *from, int len);
#define __strncpy_from_user __strncpy_user
static inline long
strncpy_from_user(char *dst, const char __user *src, long count)
{
if (!access_ok(VERIFY_READ, src, 1))
return -EFAULT;
return __strncpy_from_user(dst, src, count);
}
extern int __strnlen_user(const char __user *sstr, int len);
#define strncpy_from_user(to, from, len) \
(access_ok(VERIFY_READ, from, 1) ? \
__strncpy_user(to, from, len) : -EFAULT)
#define strnlen_user(str, len) \
(access_ok(VERIFY_READ, str, 1) ? __strnlen_user(str, len) : 0)