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1 | #ifndef __ASM_GENERIC_CMPXCHG_H |
2 | #define __ASM_GENERIC_CMPXCHG_H |
3 | |
4 | /* |
5 | * Generic cmpxchg |
6 | * |
7 | * Uses the local cmpxchg. Does not support SMP. |
8 | */ |
9 | #ifdef CONFIG_SMP |
10 | #error "Cannot use generic cmpxchg on SMP" |
11 | #endif |
12 | |
13 | /* |
14 | * Atomic compare and exchange. |
15 | * |
16 | * Do not define __HAVE_ARCH_CMPXCHG because we want to use it to check whether |
17 | * a cmpxchg primitive faster than repeated local irq save/restore exists. |
18 | */ |
19 | #define cmpxchg(ptr, o, n) cmpxchg_local((ptr), (o), (n)) |
20 | #define cmpxchg64(ptr, o, n) cmpxchg64_local((ptr), (o), (n)) |
21 | |
22 | #endif |
23 |
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