root/include/asm-generic/uaccess.h

INCLUDED FROM

#ifndef _ASM_GENERIC_UACCESS_H_
#define _ASM_GENERIC_UACCESS_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_H */