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Code Issues Releases Wiki Activity

frv: 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 2017-03-21 08:46:17 -04:00
parent 9a7513cfa2
commit 48f666c986
2 changed files with 26 additions and 36 deletions
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1
arch/frv/Kconfig
View file

@ -16,6 +16,7 @@ config FRV
select OLD_SIGACTION
select HAVE_DEBUG_STACKOVERFLOW
select ARCH_NO_COHERENT_DMA_MMAP
select ARCH_HAS_RAW_COPY_USER
config ZONE_DMA
bool

61
arch/frv/include/asm/uaccess.h
View file

@ -233,23 +233,44 @@ do { \
/*
*
*/
#define ____force(x) (__force void *)(void __user *)(x)
#ifdef CONFIG_MMU
extern long __memset_user(void *dst, unsigned long count);
extern long __memcpy_user(void *dst, const void *src, unsigned long count);
#define __clear_user(dst,count) __memset_user(____force(dst), (count))
#define __copy_from_user_inatomic(to, from, n) __memcpy_user((to), ____force(from), (n))
#define __copy_to_user_inatomic(to, from, n) __memcpy_user(____force(to), (from), (n))
#else
#define __clear_user(dst,count) (memset(____force(dst), 0, (count)), 0)
#define __copy_from_user_inatomic(to, from, n) (memcpy((to), ____force(from), (n)), 0)
#define __copy_to_user_inatomic(to, from, n) (memcpy(____force(to), (from), (n)), 0)
#endif
static inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
#ifdef CONFIG_MMU
return __memcpy_user(to, (__force const void *)from, n);
#else
memcpy(to, (__force const void *)from, n);
return 0;
#endif
}
static inline unsigned long
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
#ifdef CONFIG_MMU
return __memcpy_user((__force void *)to, from, n);
#else
memcpy((__force void *)to, from, n);
return 0;
#endif
}
#define INLINE_COPY_TO_USER
#define INLINE_COPY_FROM_USER
static inline unsigned long __must_check
clear_user(void __user *to, unsigned long n)
{
@ -258,38 +279,6 @@ clear_user(void __user *to, unsigned long n)
return n;
}
static inline unsigned long __must_check
__copy_to_user(void __user *to, const void *from, unsigned long n)
{
might_fault();
return __copy_to_user_inatomic(to, from, n);
}
static inline unsigned long
__copy_from_user(void *to, const void __user *from, unsigned long n)
{
might_fault();
return __copy_from_user_inatomic(to, from, n);
}
static inline long copy_from_user(void *to, const void __user *from, unsigned long n)
{
unsigned long ret = n;
if (likely(__access_ok(from, n)))
ret = __copy_from_user(to, from, n);
if (unlikely(ret != 0))
memset(to + (n - ret), 0, ret);
return ret;
}
static inline long copy_to_user(void __user *to, const void *from, unsigned long n)
{
return likely(__access_ok(to, n)) ? __copy_to_user(to, from, n) : n;
}
extern long strncpy_from_user(char *dst, const char __user *src, long count);
extern long strnlen_user(const char __user *src, long count);