From d12157efc8e083c77d054675fcdd594f54cc7e2b Mon Sep 17 00:00:00 2001 From: Mark Rutland Date: Mon, 5 Jun 2023 08:01:01 +0100 Subject: locking/atomic: make atomic*_{cmp,}xchg optional Most architectures define the atomic/atomic64 xchg and cmpxchg operations in terms of arch_xchg and arch_cmpxchg respectfully. Add fallbacks for these cases and remove the trivial cases from arch code. On some architectures the existing definitions are kept as these are used to build other arch_atomic*() operations. Signed-off-by: Mark Rutland Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/20230605070124.3741859-5-mark.rutland@arm.com --- arch/csky/include/asm/atomic.h | 35 ----------------------------------- 1 file changed, 35 deletions(-) (limited to 'arch/csky') diff --git a/arch/csky/include/asm/atomic.h b/arch/csky/include/asm/atomic.h index 60406ef9c2bb..4dab44f6143a 100644 --- a/arch/csky/include/asm/atomic.h +++ b/arch/csky/include/asm/atomic.h @@ -195,41 +195,6 @@ arch_atomic_dec_if_positive(atomic_t *v) } #define arch_atomic_dec_if_positive arch_atomic_dec_if_positive -#define ATOMIC_OP() \ -static __always_inline \ -int arch_atomic_xchg_relaxed(atomic_t *v, int n) \ -{ \ - return __xchg_relaxed(n, &(v->counter), 4); \ -} \ -static __always_inline \ -int arch_atomic_cmpxchg_relaxed(atomic_t *v, int o, int n) \ -{ \ - return __cmpxchg_relaxed(&(v->counter), o, n, 4); \ -} \ -static __always_inline \ -int arch_atomic_cmpxchg_acquire(atomic_t *v, int o, int n) \ -{ \ - return __cmpxchg_acquire(&(v->counter), o, n, 4); \ -} \ -static __always_inline \ -int arch_atomic_cmpxchg(atomic_t *v, int o, int n) \ -{ \ - return __cmpxchg(&(v->counter), o, n, 4); \ -} - -#define ATOMIC_OPS() \ - ATOMIC_OP() - -ATOMIC_OPS() - -#define arch_atomic_xchg_relaxed arch_atomic_xchg_relaxed -#define arch_atomic_cmpxchg_relaxed arch_atomic_cmpxchg_relaxed -#define arch_atomic_cmpxchg_acquire arch_atomic_cmpxchg_acquire -#define arch_atomic_cmpxchg arch_atomic_cmpxchg - -#undef ATOMIC_OPS -#undef ATOMIC_OP - #else #include #endif -- cgit v1.2.3