From 9eca53508a157c6b6fdb6e06796902cf8a920d29 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <Bart.VanAssche@sandisk.com>
Date: Mon, 2 Jan 2017 09:48:47 -0700
Subject: [PATCH] block: Avoid that sparse complains about context imbalance in
__wbt_wait()
This patch does not change any functionality.
Fixes: e34cbd307477 ("blk-wbt: add general throttling mechanism")
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
---
block/blk-wbt.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/block/blk-wbt.c b/block/blk-wbt.c
index fd28c2806406..f0a9c07b4c7a 100644
--- a/block/blk-wbt.c
+++ b/block/blk-wbt.c
@@ -544,6 +544,8 @@ static inline bool may_queue(struct rq_wb *rwb, struct rq_wait *rqw,
* the timer to kick off queuing again.
*/
static void __wbt_wait(struct rq_wb *rwb, unsigned long rw, spinlock_t *lock)
+ __releases(lock)
+ __acquires(lock)
{
struct rq_wait *rqw = get_rq_wait(rwb, current_is_kswapd());
DEFINE_WAIT(wait);
@@ -558,13 +560,12 @@ static void __wbt_wait(struct rq_wb *rwb, unsigned long rw, spinlock_t *lock)
if (may_queue(rwb, rqw, &wait, rw))
break;
- if (lock)
+ if (lock) {
spin_unlock_irq(lock);
-
- io_schedule();
-
- if (lock)
+ io_schedule();
spin_lock_irq(lock);
+ } else
+ io_schedule();
} while (1);
finish_wait(&rqw->wait, &wait);
--
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