On Tue, 2011-05-03 at 23:30 +0200, Sven Eckelmann wrote:
Introduce an *_dec_not_zero operation. Make 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.
For arch/powerpc: Acked-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx> (Sorry for catching up late) Cheers, Ben.
diff --git a/arch/powerpc/include/asm/atomic.h b/arch/powerpc/include/asm/atomic.h index b8f152e..906f49a 100644 --- a/arch/powerpc/include/asm/atomic.h +++ b/arch/powerpc/include/asm/atomic.h @@ -213,6 +213,7 @@ static __inline__ int atomic_add_unless(atomic_t *v, int a, int 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) #define atomic_sub_and_test(a, v) (atomic_sub_return((a), (v)) == 0) #define atomic_dec_and_test(v) (atomic_dec_return((v)) == 0) @@ -469,6 +470,7 @@ static __inline__ int atomic64_add_unless(atomic64_t *v, long a, long u) } #define atomic64_inc_not_zero(v) atomic64_add_unless((v), 1, 0) +#define atomic64_dec_not_zero(v) atomic64_add_unless((v), -1, 0) #else /* __powerpc64__ */ #include <asm-generic/atomic64.h> diff --git a/arch/powerpc/include/asm/local.h b/arch/powerpc/include/asm/local.h index c2410af..3d4c58a 100644 --- a/arch/powerpc/include/asm/local.h +++ b/arch/powerpc/include/asm/local.h @@ -134,6 +134,7 @@ static __inline__ int local_add_unless(local_t *l, long a, long u) } #define local_inc_not_zero(l) local_add_unless((l), 1, 0) +#define local_dec_not_zero(l) local_add_unless((l), -1, 0) #define local_sub_and_test(a, l) (local_sub_return((a), (l)) == 0) #define local_dec_and_test(l) (local_dec_return((l)) == 0)
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