[linux-2.6-block.git] / include / asm-generic / uaccess-unaligned.h

#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 */
Commit	Line	Data
5b17e1cd AB	1	#ifndef __ASM_GENERIC_UACCESS_UNALIGNED_H
5b17e1cd AB	2	#define __ASM_GENERIC_UACCESS_UNALIGNED_H
1da177e4 LT	3
	4	/*
	5	* This macro should be used instead of __get_user() when accessing
	6	* values at locations that are not known to be aligned.
	7	*/
	8	#define __get_user_unaligned(x, ptr) \
	9	({ \
	10	__typeof__ (*(ptr)) __x; \
	11	__copy_from_user(&__x, (ptr), sizeof(*(ptr))) ? -EFAULT : 0; \
	12	(x) = __x; \
	13	})
	14
	15
	16	/*
	17	* This macro should be used instead of __put_user() when accessing
	18	* values at locations that are not known to be aligned.
	19	*/
	20	#define __put_user_unaligned(x, ptr) \
	21	({ \
	22	__typeof__ (*(ptr)) __x = (x); \
	23	__copy_to_user((ptr), &__x, sizeof(*(ptr))) ? -EFAULT : 0; \
	24	})
	25
5b17e1cd	26	#endif /* __ASM_GENERIC_UACCESS_UNALIGNED_H */