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git.proxmox.com Git - mirror_ubuntu-zesty-kernel.git/blob - include/asm-generic/cmpxchg.h
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1 #ifndef __ASM_GENERIC_CMPXCHG_H
2 #define __ASM_GENERIC_CMPXCHG_H
7 * Uses the local cmpxchg. Does not support SMP.
10 #error "Cannot use generic cmpxchg on SMP"
13 #include <asm-generic/cmpxchg-local.h>
16 * Atomic compare and exchange.
18 * Do not define __HAVE_ARCH_CMPXCHG because we want to use it to check whether
19 * a cmpxchg primitive faster than repeated local irq save/restore exists.
21 #define cmpxchg(ptr, o, n) cmpxchg_local((ptr), (o), (n))
22 #define cmpxchg64(ptr, o, n) cmpxchg64_local((ptr), (o), (n))