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percpu: add __this_cpu_try_cmpxchg()

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Add __this_cpu_try_cmpxchg() version of the percpu op.

Link: https://lkml.kernel.org/r/20240528144345.5980-1-ubizjak@gmail.com
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Reviewed-by: Uladzislau Rezki (Sony) <urezki@gmail.com>
Acked-by: Dennis Zhou <dennis@kernel.org>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Lorenzo Stoakes <lstoakes@gmail.com>
Cc: Tejun Heo <tj@kernel.org>
Cc: Christoph Lameter <cl@linux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Uros Bizjak 2024-05-28 16:43:13 +02:00 committed by Andrew Morton
parent fefc6e6631
commit 21664442be
1 changed files with 6 additions and 0 deletions
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6
include/linux/percpu-defs.h
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@ -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)