Message ID | 20230305205628.27385-7-ubizjak@gmail.com (mailing list archive) |
---|---|
State | Handled Elsewhere |
Headers | show
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Series |
locking: Introduce local{,64}_try_cmpxchg
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expand
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diff --git a/arch/powerpc/include/asm/local.h b/arch/powerpc/include/asm/local.h index bc4bd19b7fc2..45492fb5bf22 100644 --- a/arch/powerpc/include/asm/local.h +++ b/arch/powerpc/include/asm/local.h @@ -90,6 +90,17 @@ static __inline__ long local_cmpxchg(local_t *l, long o, long n) return t; } +static __inline__ bool local_try_cmpxchg(local_t *l, long *po, long n) +{ + long o = *po, r; + + r = local_cmpxchg(l, o, n); + if (unlikely(r != o)) + *po = r; + + return likely(r == o); +} + static __inline__ long local_xchg(local_t *l, long n) { long t;
Implement target specific support for local_try_cmpxchg. Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Nicholas Piggin <npiggin@gmail.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Signed-off-by: Uros Bizjak <ubizjak@gmail.com> --- arch/powerpc/include/asm/local.h | 11 +++++++++++ 1 file changed, 11 insertions(+)