1 #ifndef __I386_UNALIGNED_H
2 #define __I386_UNALIGNED_H
3 
4 /*
5  * The i386 can do unaligned accesses itself.
6  *
7  * The strange macros are there to make sure these can't
8  * be misused in a way that makes them not work on other
9  * architectures where unaligned accesses aren't as simple.
10  */
11 
12 /**
13  * get_unaligned - get value from possibly mis-aligned location
14  * @ptr: pointer to value
15  *
16  * This macro should be used for accessing values larger in size than
17  * single bytes at locations that are expected to be improperly aligned,
18  * e.g. retrieving a u16 value from a location not u16-aligned.
19  *
20  * Note that unaligned accesses can be very expensive on some architectures.
21  */
22 #define get_unaligned(ptr) (*(ptr))
23 
24 /**
25  * put_unaligned - put value to a possibly mis-aligned location
26  * @val: value to place
27  * @ptr: pointer to location
28  *
29  * This macro should be used for placing values larger in size than
30  * single bytes at locations that are expected to be improperly aligned,
31  * e.g. writing a u16 value to a location not u16-aligned.
32  *
33  * Note that unaligned accesses can be very expensive on some architectures.
34  */
35 #define put_unaligned(val, ptr) ((void)( *(ptr) = (val) ))
36 
37 #endif
38