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    SubjectRe: [RFC][PATCH 15/24] powerpc: Provide atomic_{or,xor,and}
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    On Thu, 2015-07-09 at 19:29 +0200, Peter Zijlstra wrote:
    > Implement atomic logic ops -- atomic_{or,xor,and}.
    >
    > These will replace the atomic_{set,clear}_mask functions that are
    > available on some archs.
    >
    > Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
    > ---
    > arch/powerpc/include/asm/atomic.h | 6 ++++++
    > 1 file changed, 6 insertions(+)
    >
    > --- a/arch/powerpc/include/asm/atomic.h
    > +++ b/arch/powerpc/include/asm/atomic.h
    > @@ -66,6 +66,9 @@ static __inline__ int atomic_##op##_retu
    >
    > ATOMIC_OPS(add, add)
    > ATOMIC_OPS(sub, subf)
    > +ATOMIC_OP(and, and)
    > +ATOMIC_OP(or, or)
    > +ATOMIC_OP(xor, xor)
    >
    > #undef ATOMIC_OPS
    > #undef ATOMIC_OP_RETURN
    > @@ -304,6 +307,9 @@ static __inline__ long atomic64_##op##_r
    >
    > ATOMIC64_OPS(add, add)
    > ATOMIC64_OPS(sub, subf)
    > +ATOMIC64_OP(and, and)
    > +ATOMIC64_OP(or, or)
    > +ATOMIC64_OP(xor, xor)

    As long as you are ok that they are non-ordered atomics (no barrier in
    them), then

    Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

    > #undef ATOMIC64_OPS
    > #undef ATOMIC64_OP_RETURN
    >
    >
    > --
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