| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* Never include this file directly. Include <linux/compiler.h> instead. */ |
| 2 | |
| 3 | /* These definitions are for GCC v2.x. */ |
| 4 | |
| 5 | /* Somewhere in the middle of the GCC 2.96 development cycle, we implemented |
| 6 | a mechanism by which the user can annotate likely branch directions and |
| 7 | expect the blocks to be reordered appropriately. Define __builtin_expect |
| 8 | to nothing for earlier compilers. */ |
| 9 | #include <linux/compiler-gcc.h> |
| 10 | |
| 11 | #if __GNUC_MINOR__ < 96 |
| 12 | # define __builtin_expect(x, expected_value) (x) |
| 13 | #endif |
| 14 | |
| 15 | #define __attribute_used__ __attribute__((__unused__)) |
| 16 | |
| 17 | /* |
| 18 | * The attribute `pure' is not implemented in GCC versions earlier |
| 19 | * than 2.96. |
| 20 | */ |
| 21 | #if __GNUC_MINOR__ >= 96 |
| 22 | # define __attribute_pure__ __attribute__((pure)) |
| 23 | # define __attribute_const__ __attribute__((__const__)) |
| 24 | #endif |