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microblaze: switch to RAW_COPY_USER

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[kudos to Piotr Sroka for spotting a braino in the previous variant]

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2017-03-21 12:10:12 -04:00
parent 730132e7e5
commit d491afb865
2 changed files with 9 additions and 28 deletions
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1
arch/microblaze/Kconfig
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@ -34,6 +34,7 @@ config MICROBLAZE
select TRACING_SUPPORT
select VIRT_TO_BUS
select CPU_NO_EFFICIENT_FFS
select ARCH_HAS_RAW_COPY_USER
config SWAP
def_bool n

36
arch/microblaze/include/asm/uaccess.h
View File

@ -336,39 +336,19 @@ extern long __user_bad(void);
__gu_err; \
})
/* copy_to_from_user */
#define __copy_from_user(to, from, n) \
__copy_tofrom_user((__force void __user *)(to), \
(void __user *)(from), (n))
#define __copy_from_user_inatomic(to, from, n) \
__copy_from_user((to), (from), (n))
static inline long copy_from_user(void *to,
const void __user *from, unsigned long n)
static inline unsigned long
raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
unsigned long res = n;
might_fault();
if (likely(access_ok(VERIFY_READ, from, n)))
res = __copy_from_user(to, from, n);
if (unlikely(res))
memset(to + (n - res), 0, res);
return res;
return __copy_tofrom_user((__force void __user *)to, from, n);
}
#define __copy_to_user(to, from, n) \
__copy_tofrom_user((void __user *)(to), \
(__force const void __user *)(from), (n))
#define __copy_to_user_inatomic(to, from, n) __copy_to_user((to), (from), (n))
static inline long copy_to_user(void __user *to,
const void *from, unsigned long n)
static inline unsigned long
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
might_fault();
if (access_ok(VERIFY_WRITE, to, n))
return __copy_to_user(to, from, n);
return n;
return __copy_tofrom_user(to, (__force const void __user *)from, n);
}
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER
/*
* Copy a null terminated string from userspace.