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author | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-21 08:46:17 -0400 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-28 18:23:32 -0400 |
commit | 48f666c986671ea2021971bfbe4d74a7ebcf0a44 (patch) | |
tree | 87111adc44eecad1611535df0609a6e766ea5049 | |
parent | 9a7513cfa26f5fcce15de6130ce3c27d77c0ce55 (diff) | |
download | linux-stable-48f666c986671ea2021971bfbe4d74a7ebcf0a44.tar.gz linux-stable-48f666c986671ea2021971bfbe4d74a7ebcf0a44.tar.bz2 linux-stable-48f666c986671ea2021971bfbe4d74a7ebcf0a44.zip |
frv: switch to RAW_COPY_USER
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r-- | arch/frv/Kconfig | 1 | ||||
-rw-r--r-- | arch/frv/include/asm/uaccess.h | 57 |
2 files changed, 24 insertions, 34 deletions
diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig index eefd9a4ed156..e489fef111dd 100644 --- a/arch/frv/Kconfig +++ b/arch/frv/Kconfig @@ -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 diff --git a/arch/frv/include/asm/uaccess.h b/arch/frv/include/asm/uaccess.h index 5bcc57de3c95..e4e33b4cd3ae 100644 --- a/arch/frv/include/asm/uaccess.h +++ b/arch/frv/include/asm/uaccess.h @@ -233,61 +233,50 @@ 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 __must_check -clear_user(void __user *to, unsigned long n) -{ - if (likely(__access_ok(to, n))) - n = __clear_user(to, 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) +raw_copy_from_user(void *to, const void __user *from, unsigned long n) { - might_fault(); - return __copy_from_user_inatomic(to, from, 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 long copy_from_user(void *to, const void __user *from, unsigned long n) +static inline unsigned long +raw_copy_to_user(void __user *to, const void *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; +#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 long copy_to_user(void __user *to, const void *from, unsigned long n) +static inline unsigned long __must_check +clear_user(void __user *to, unsigned long n) { - return likely(__access_ok(to, n)) ? __copy_to_user(to, from, n) : n; + if (likely(__access_ok(to, n))) + n = __clear_user(to, n); + return n; } extern long strncpy_from_user(char *dst, const char __user *src, long count); |