From: Paolo Valente <paolo.valente@linaro.org>
To: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org,
ulf.hansson@linaro.org, broonie@kernel.org,
linus.walleij@linaro.org, bfq-iosched@googlegroups.com,
oleksandr@natalenko.name,
Paolo Valente <paolo.valente@linaro.org>
Subject: [PATCH BUGFIX 1/1] block, bfq: compile group put for oom queue only if BFQ_GROUP_IOSCHED is set
Date: Wed, 10 Jan 2018 15:58:56 +0100 [thread overview]
Message-ID: <20180110145856.4040-2-paolo.valente@linaro.org> (raw)
In-Reply-To: <20180110145856.4040-1-paolo.valente@linaro.org>
Commit ("block, bfq: release oom-queue ref to root group on exit")
added a missing put of the root bfq group for the oom queue. That put
has to be, and can be, performed only if CONFIG_BFQ_GROUP_IOSCHED is
defined: the function doing the put is even not defined at all if
CONFIG_BFQ_GROUP_IOSCHED is not defined. But that commit makes that
put be invoked regardless of whether CONFIG_BFQ_GROUP_IOSCHED is
defined. This commit fixes this mistake, by making that invocation be
compiled only if CONFIG_BFQ_GROUP_IOSCHED is actually defined.
Fixes ("block, bfq: release oom-queue ref to root group on exit")
Reported-by: Jan Alexander Steffens <jan.steffens@gmail.com>
Signed-off-by: Paolo Valente <paolo.valente@linaro.org>
---
block/bfq-iosched.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/block/bfq-iosched.c b/block/bfq-iosched.c
index c56a495af2e8..93a97a7fe519 100644
--- a/block/bfq-iosched.c
+++ b/block/bfq-iosched.c
@@ -5015,10 +5015,9 @@ static void bfq_exit_queue(struct elevator_queue *e)
hrtimer_cancel(&bfqd->idle_slice_timer);
+#ifdef CONFIG_BFQ_GROUP_IOSCHED
/* release oom-queue reference to root group */
bfqg_and_blkg_put(bfqd->root_group);
-
-#ifdef CONFIG_BFQ_GROUP_IOSCHED
blkcg_deactivate_policy(bfqd->queue, &blkcg_policy_bfq);
#else
spin_lock_irq(&bfqd->lock);
--
2.15.1
next prev parent reply other threads:[~2018-01-10 14:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-01-10 14:58 [PATCH BUGFIX 0/1] bloc, bfq: fix of a bug introduced by my last patch Paolo Valente
2018-01-10 14:58 ` Paolo Valente [this message]
2018-01-10 15:23 ` [PATCH BUGFIX 1/1] block, bfq: compile group put for oom queue only if BFQ_GROUP_IOSCHED is set Jens Axboe
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