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Diffstat (limited to 'include/asm-generic/uaccess-unaligned.h')
| -rw-r--r-- | include/asm-generic/uaccess-unaligned.h | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/include/asm-generic/uaccess-unaligned.h b/include/asm-generic/uaccess-unaligned.h new file mode 100644 index 000000000000..67deb898f0c5 --- /dev/null +++ b/include/asm-generic/uaccess-unaligned.h @@ -0,0 +1,26 @@ +#ifndef __ASM_GENERIC_UACCESS_UNALIGNED_H +#define __ASM_GENERIC_UACCESS_UNALIGNED_H + +/* + * This macro should be used instead of __get_user() when accessing + * values at locations that are not known to be aligned. + */ +#define __get_user_unaligned(x, ptr) \ +({ \ + __typeof__ (*(ptr)) __x; \ + __copy_from_user(&__x, (ptr), sizeof(*(ptr))) ? -EFAULT : 0; \ + (x) = __x; \ +}) + + +/* + * This macro should be used instead of __put_user() when accessing + * values at locations that are not known to be aligned. + */ +#define __put_user_unaligned(x, ptr) \ +({ \ + __typeof__ (*(ptr)) __x = (x); \ + __copy_to_user((ptr), &__x, sizeof(*(ptr))) ? -EFAULT : 0; \ +}) + +#endif /* __ASM_GENERIC_UACCESS_UNALIGNED_H */ |