On Tue, May 3, 2011 at 17:30, Sven Eckelmann wrote:
Introduce an *_dec_not_zero operation. ÂMake this a special case of
*_add_unless because batman-adv uses atomic_dec_not_zero in different
places like re-broadcast queue or aggregation queue management. There
are other non-final patches which may also want to use this macro.
Cc: uclinux-dist-devel@xxxxxxxxxxxxxxxxxxxx
--- a/arch/blackfin/include/asm/atomic.h
+++ b/arch/blackfin/include/asm/atomic.h
@@ -103,6 +103,7 @@ static inline int atomic_test_mask(int mask, atomic_t *v)
c != (u); \
})
#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
+#define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
/*
* atomic_inc_and_test - increment and test
no opinion on the actual idea, but for the Blackfin pieces:
Acked-by: Mike Frysinger <vapier@xxxxxxxxxx>
-mike
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