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| author |   Al Viro <viro@zeniv.linux.org.uk> | 2017-03-20 21:56:06 -0400 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-28 18:22:11 -0400 |
| commit | d597580d373774b1bdab84b3d26ff0b55162b916 (patch) | |
| tree | ebbd7de012fcb731c40c67791e4e5e370844f70c /include/asm-generic/uaccess.h | |
| parent | asm-generic: zero in __get_user(), not __get_user_fn() (diff) | |
| download | wireguard-linux-d597580d373774b1bdab84b3d26ff0b55162b916.tar.xz wireguard-linux-d597580d373774b1bdab84b3d26ff0b55162b916.zip | |
generic ...copy_..._user primitives
provide raw_copy_..._user() and select ARCH_HAS_RAW_COPY_USER to use those.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/asm-generic/uaccess.h')
| -rw-r--r-- | include/asm-generic/uaccess.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index bd7a05e9582b..d65c311eb128 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -86,7 +86,11 @@ static inline int __access_ok(unsigned long addr, unsigned long size) static inline int __put_user_fn(size_t size, void __user *ptr, void *x) { +#ifdef CONFIG_ARCH_HAS_RAW_COPY_USER + return unlikely(raw_copy_to_user(ptr, x, size)) ? -EFAULT : 0; +#else return unlikely(__copy_to_user(ptr, x, size)) ? -EFAULT : 0; +#endif } #define __put_user_fn(sz, u, k) __put_user_fn(sz, u, k) @@ -147,7 +151,11 @@ extern int __put_user_bad(void) __attribute__((noreturn)); #ifndef __get_user_fn static inline int __get_user_fn(size_t size, const void __user *ptr, void *x) { +#ifdef CONFIG_ARCH_HAS_RAW_COPY_USER + return unlikely(raw_copy_from_user(x, ptr, size)) ? -EFAULT : 0; +#else return unlikely(__copy_from_user(x, ptr, size)) ? -EFAULT : 0; +#endif } #define __get_user_fn(sz, u, k) __get_user_fn(sz, u, k) @@ -156,6 +164,8 @@ static inline int __get_user_fn(size_t size, const void __user *ptr, void *x) extern int __get_user_bad(void) __attribute__((noreturn)); +#ifndef CONFIG_ARCH_HAS_RAW_COPY_USER + #ifndef __copy_from_user_inatomic #define __copy_from_user_inatomic __copy_from_user #endif @@ -185,6 +195,7 @@ static inline long copy_to_user(void __user *to, else return n; } +#endif /* * Copy a null terminated string from userspace. |