[PATCH 15/16] block: use __this_cpu_add() instead of access by smp_processor_id()
From: Christoph Hellwig <hch@lst.de>
Date: 2020-05-25 11:31:11
Also in:
dm-devel, linux-bcache, lkml, nvdimm
Subsystem:
the rest · Maintainer:
Linus Torvalds
From: Konstantin Khlebnikov <redacted> Most architectures have fast path to access percpu for current cpu. The required preempt_disable() is provided by part_stat_lock(). Signed-off-by: Konstantin Khlebnikov <redacted> [hch: rebased] Signed-off-by: Christoph Hellwig <hch@lst.de> --- include/linux/part_stat.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/linux/part_stat.h b/include/linux/part_stat.h
index a6b0938ce82e9..24125778ef3ec 100644
--- a/include/linux/part_stat.h
+++ b/include/linux/part_stat.h@@ -54,7 +54,7 @@ static inline void part_stat_set_all(struct hd_struct *part, int value) part_stat_read(part, field[STAT_DISCARD])) #define __part_stat_add(part, field, addnd) \ - (part_stat_get(part, field) += (addnd)) + __this_cpu_add((part)->dkstats->field, addnd) #define part_stat_add(part, field, addnd) do { \ __part_stat_add((part), field, addnd); \
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2.26.2