On Wed, Apr 05, 2023 at 04:17:08PM +0200, Uros Bizjak wrote:
> 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);
> +}
> +
Why is the ppc one different from the rest? Why can't it use the
try_cmpxchg_local() fallback and needs to have it open-coded?
