2018-08-27 14:32:32 +00:00
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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Wed, 9 Apr 2014 10:37:23 +0200
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2019-11-25 00:04:39 +00:00
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Subject: [PATCH 179/290] block: mq: use cpu_light()
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Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=89d6f7956e2046a5b49e51aa3f200b64023fb8aa
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2018-08-27 14:32:32 +00:00
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there is a might sleep splat because get_cpu() disables preemption and
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later we grab a lock. As a workaround for this we use get_cpu_light().
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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2019-04-08 23:49:20 +00:00
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block/blk-mq.h | 4 ++--
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2018-08-27 14:32:32 +00:00
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1 file changed, 2 insertions(+), 2 deletions(-)
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2019-04-08 23:49:20 +00:00
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diff --git a/block/blk-mq.h b/block/blk-mq.h
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2019-11-25 00:04:39 +00:00
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index 5ad9251627f8..5a96c97991b6 100644
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2018-08-27 14:32:32 +00:00
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--- a/block/blk-mq.h
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+++ b/block/blk-mq.h
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2019-04-08 23:49:20 +00:00
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@@ -113,12 +113,12 @@ static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q,
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2018-08-27 14:32:32 +00:00
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*/
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static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q)
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{
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- return __blk_mq_get_ctx(q, get_cpu());
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+ return __blk_mq_get_ctx(q, get_cpu_light());
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}
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static inline void blk_mq_put_ctx(struct blk_mq_ctx *ctx)
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{
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- put_cpu();
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+ put_cpu_light();
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}
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struct blk_mq_alloc_data {
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