Re: [PATCH v2 1/2] percpu: Add __this_cpu_try_cmpxchg()

Uladzislau Rezki
2024-05-28T18:50:25Z

On Tue, May 28, 2024 at 04:43:13PM +0200, Uros Bizjak wrote:
> Add __this_cpu_try_cmpxchg() version of the percpu op.
>
> Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
> Cc: Andrew Morton <akpm@linux-foundation.org>
> Cc: Uladzislau Rezki <urezki@gmail.com>
> Cc: Christoph Hellwig <hch@infradead.org>
> Cc: Lorenzo Stoakes <lstoakes@gmail.com>
> Cc: Dennis Zhou <dennis@kernel.org>
> Cc: Tejun Heo <tj@kernel.org>
> Cc: Christoph Lameter <cl@linux.com>
> ---
> include/linux/percpu-defs.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/include/linux/percpu-defs.h b/include/linux/percpu-defs.h
> index ec3573119923..8efce7414fad 100644
> --- a/include/linux/percpu-defs.h
> +++ b/include/linux/percpu-defs.h
> @@ -475,6 +475,12 @@ do { \
> raw_cpu_cmpxchg(pcp, oval, nval); \
> })
>
> +#define __this_cpu_try_cmpxchg(pcp, ovalp, nval) \
> +({ \
> + __this_cpu_preempt_check("try_cmpxchg"); \
> + raw_cpu_try_cmpxchg(pcp, ovalp, nval); \
> +})
> +
> #define __this_cpu_sub(pcp, val) __this_cpu_add(pcp, -(typeof(pcp))(val))
> #define __this_cpu_inc(pcp) __this_cpu_add(pcp, 1)
> #define __this_cpu_dec(pcp) __this_cpu_sub(pcp, 1)
> --
> 2.42.0
>
Acked-by: Uladzislau Rezki (Sony) <urezki@gmail.com>

Thanks!

--
Uladzislau Rezki