diff options
| author | Christoph Hellwig <hch@lst.de> | 2020-09-07 07:58:20 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-10-04 19:26:57 +0200 |
| commit | 2d2d255467d4ea927fbf606c8b584512edee0f7b (patch) | |
| tree | 0decbcb0bf79ac6049f32d1367175f7bb1630362 /include | |
| parent | asm-generic: improve the nommu {get,put}_user handling (diff) | |
| download | linux-2d2d255467d4ea927fbf606c8b584512edee0f7b.tar.xz linux-2d2d255467d4ea927fbf606c8b584512edee0f7b.zip | |
asm-generic: add nommu implementations of __{get,put}_kernel_nofault
Add native implementations of __{get,put}_kernel_nofault using
{get,put}_unaligned, just like the {get,put}_user implementations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/asm-generic/uaccess.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h index 6de5f524e9e6..b367f339be1a 100644 --- a/include/asm-generic/uaccess.h +++ b/include/asm-generic/uaccess.h @@ -61,6 +61,22 @@ static inline int __put_user_fn(size_t size, void __user *to, void *from) } #define __put_user_fn(sz, u, k) __put_user_fn(sz, u, k) +#define __get_kernel_nofault(dst, src, type, err_label) \ +do { \ + *((type *)dst) = get_unaligned((type *)(src)); \ + if (0) /* make sure the label looks used to the compiler */ \ + goto err_label; \ +} while (0) + +#define __put_kernel_nofault(dst, src, type, err_label) \ +do { \ + put_unaligned(*((type *)src), (type *)(dst)); \ + if (0) /* make sure the label looks used to the compiler */ \ + goto err_label; \ +} while (0) + +#define HAVE_GET_KERNEL_NOFAULT 1 + static inline __must_check unsigned long raw_copy_from_user(void *to, const void __user * from, unsigned long n) { |