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@xxxxxxxxx>
> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
> Cc: Uladzislau Rezki <urezki@xxxxxxxxx>
> Cc: Christoph Hellwig <hch@xxxxxxxxxxxxx>
> Cc: Lorenzo Stoakes <lstoakes@xxxxxxxxx>
> Cc: Dennis Zhou <dennis@xxxxxxxxxx>
> Cc: Tejun Heo <tj@xxxxxxxxxx>
> Cc: Christoph Lameter <cl@xxxxxxxxx>
> ---
> 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@xxxxxxxxx>
Thanks!
--
Uladzislau Rezki
