| #ifndef __ASM_SYNC_BITOPS_H__ | |
| #define __ASM_SYNC_BITOPS_H__ | |
| #include <asm/bitops.h> | |
| #include <asm/cmpxchg.h> | |
| /* sync_bitops functions are equivalent to the SMP implementation of the | |
| * original functions, independently from CONFIG_SMP being defined. | |
| * | |
| * We need them because _set_bit etc are not SMP safe if !CONFIG_SMP. But | |
| * under Xen you might be communicating with a completely external entity | |
| * who might be on another CPU (e.g. two uniprocessor guests communicating | |
| * via event channels and grant tables). So we need a variant of the bit | |
| * ops which are SMP safe even on a UP kernel. | |
| */ | |
| #define sync_set_bit(nr, p) set_bit(nr, p) | |
| #define sync_clear_bit(nr, p) clear_bit(nr, p) | |
| #define sync_change_bit(nr, p) change_bit(nr, p) | |
| #define sync_test_and_set_bit(nr, p) test_and_set_bit(nr, p) | |
| #define sync_test_and_clear_bit(nr, p) test_and_clear_bit(nr, p) | |
| #define sync_test_and_change_bit(nr, p) test_and_change_bit(nr, p) | |
| #define sync_test_bit(nr, addr) test_bit(nr, addr) | |
| #define sync_cmpxchg cmpxchg | |
| #endif |