__xchg_wrapper 101 arch/arm64/include/asm/cmpxchg.h #define arch_xchg_relaxed(...) __xchg_wrapper( , __VA_ARGS__) __xchg_wrapper 102 arch/arm64/include/asm/cmpxchg.h #define arch_xchg_acquire(...) __xchg_wrapper(_acq, __VA_ARGS__) __xchg_wrapper 103 arch/arm64/include/asm/cmpxchg.h #define arch_xchg_release(...) __xchg_wrapper(_rel, __VA_ARGS__) __xchg_wrapper 104 arch/arm64/include/asm/cmpxchg.h #define arch_xchg(...) __xchg_wrapper( _mb, __VA_ARGS__)