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From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 9 Apr 2014 10:37:23 +0200
Subject: [PATCH 178/342] block: mq: use cpu_light()
Origin: https://git.kernel.org/cgit/linux/kernel/git/rt/linux-stable-rt.git/commit?id=ceaaa62b2d57cc6c4ea2ea7dba6f6c266bd208b5
there is a might sleep splat because get_cpu() disables preemption and
later we grab a lock. As a workaround for this we use get_cpu_light().
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
---
block/blk-mq.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/blk-mq.h b/block/blk-mq.h
index 5ad9251627f8..5a96c97991b6 100644
--- a/block/blk-mq.h
+++ b/block/blk-mq.h
@@ -113,12 +113,12 @@ static inline struct blk_mq_ctx *__blk_mq_get_ctx(struct request_queue *q,
*/
static inline struct blk_mq_ctx *blk_mq_get_ctx(struct request_queue *q)
{
- return __blk_mq_get_ctx(q, get_cpu());
+ return __blk_mq_get_ctx(q, get_cpu_light());
}
static inline void blk_mq_put_ctx(struct blk_mq_ctx *ctx)
{
- put_cpu();
+ put_cpu_light();
}
struct blk_mq_alloc_data {
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