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| author |   David S. Miller <davem@davemloft.net> | 2016-09-23 06:46:57 -0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-09-23 06:46:57 -0400 |
| commit | d6989d4bbe6c4d1c2a76696833a07f044e85694d (patch) | |
| tree | 2d9a70d0feee4d4a20568be1b39a961fa0d27d81 /arch/avr32/include/asm/uaccess.h | |
| parent | xen-netback: switch to threaded irq for control ring (diff) | |
| parent | Merge tag 'media/v4.8-7' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media (diff) | |
| download | linux-dev-d6989d4bbe6c4d1c2a76696833a07f044e85694d.tar.xz linux-dev-d6989d4bbe6c4d1c2a76696833a07f044e85694d.zip | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/avr32/include/asm/uaccess.h')
| -rw-r--r-- | arch/avr32/include/asm/uaccess.h | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/avr32/include/asm/uaccess.h b/arch/avr32/include/asm/uaccess.h index 68cf638faf48..b1ec1fa06463 100644 --- a/arch/avr32/include/asm/uaccess.h +++ b/arch/avr32/include/asm/uaccess.h @@ -74,7 +74,7 @@ extern __kernel_size_t __copy_user(void *to, const void *from, extern __kernel_size_t copy_to_user(void __user *to, const void *from, __kernel_size_t n); -extern __kernel_size_t copy_from_user(void *to, const void __user *from, +extern __kernel_size_t ___copy_from_user(void *to, const void __user *from, __kernel_size_t n); static inline __kernel_size_t __copy_to_user(void __user *to, const void *from, @@ -88,6 +88,15 @@ static inline __kernel_size_t __copy_from_user(void *to, { return __copy_user(to, (const void __force *)from, n); } +static inline __kernel_size_t copy_from_user(void *to, + const void __user *from, + __kernel_size_t n) +{ + size_t res = ___copy_from_user(to, from, n); + if (unlikely(res)) + memset(to + (n - res), 0, res); + return res; +} #define __copy_to_user_inatomic __copy_to_user #define __copy_from_user_inatomic __copy_from_user |