[PATCH] sparc64: implement atomic_add_negative()

2a43abd3 · Andrew Morton · Linus Torvalds · bcd599c6 · 2a43abd3
Commit 2a43abd3 authored May 14, 2004 by Andrew Morton Committed by Linus Torvalds May 14, 2004
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include/asm-sparc64/atomic.h include/asm-sparc64/atomic.h +3 -0

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--- a/include/asm-sparc64/atomic.h
+++ b/include/asm-sparc64/atomic.h
@@ -62,6 +62,9 @@ extern int __atomic64_sub(__s64, atomic64_t *);
 #define atomic_dec(v) ((void)__atomic_sub(1, v))
 #define atomic64_dec(v) ((void)__atomic64_sub(1, v))

+#define atomic_add_negative(i, v) (__atomic_add(i, v) < 0)
+#define atomic64_add_negative(i, v) (__atomic64_add(i, v) < 0)
+
 /* Atomic operations are already serializing */
 #define smp_mb__before_atomic_dec()	barrier()
 #define smp_mb__after_atomic_dec()	barrier()