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    SubjectRe: [PATCH] atomic: add *_dec_not_zero
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    On Wed, 2011-05-04 at 00:44 -0400, Mike Frysinger wrote:
    > On Tue, May 3, 2011 at 17:30, 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.
    > >
    > > Cc: uclinux-dist-devel@blackfin.uclinux.org
    > >
    > > --- 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@gentoo.org>

    This goes for parisc as well.

    Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com>

    James




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