| #ifndef __I386_UNALIGNED_H |
| #define __I386_UNALIGNED_H |
| |
| /* |
| * The i386 can do unaligned accesses itself. |
| * |
| * The strange macros are there to make sure these can't |
| * be misused in a way that makes them not work on other |
| * architectures where unaligned accesses aren't as simple. |
| */ |
| |
| /** |
| * get_unaligned - get value from possibly mis-aligned location |
| * @ptr: pointer to value |
| * |
| * This macro should be used for accessing values larger in size than |
| * single bytes at locations that are expected to be improperly aligned, |
| * e.g. retrieving a u16 value from a location not u16-aligned. |
| * |
| * Note that unaligned accesses can be very expensive on some architectures. |
| */ |
| #define get_unaligned(ptr) (*(ptr)) |
| |
| /** |
| * put_unaligned - put value to a possibly mis-aligned location |
| * @val: value to place |
| * @ptr: pointer to location |
| * |
| * This macro should be used for placing values larger in size than |
| * single bytes at locations that are expected to be improperly aligned, |
| * e.g. writing a u16 value to a location not u16-aligned. |
| * |
| * Note that unaligned accesses can be very expensive on some architectures. |
| */ |
| #define put_unaligned(val, ptr) ((void)( *(ptr) = (val) )) |
| |
| #endif |