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| author | Bart Van Assche <bart.vanassche@wdc.com> | 2018-03-08 02:10:05 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-03-08 22:13:48 +0100 |
| commit | 7dfdbc7367f6f789715cab2cb484b78ab45e9f3e (patch) | |
| tree | 12bb8fc5fe749d47d9948f2a2b502a021fe9dd1d /block/blk-mq.c | |
| parent | block: Introduce blk_queue_flag_{set,clear,test_and_{set,clear}}() (diff) | |
| download | linux-7dfdbc7367f6f789715cab2cb484b78ab45e9f3e.tar.xz linux-7dfdbc7367f6f789715cab2cb484b78ab45e9f3e.zip | |
block: Protect queue flag changes with the queue lock
Since the queue flags may be changed concurrently from multiple
contexts after a queue becomes visible in sysfs, make these changes
safe by protecting these with the queue lock.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Hannes Reinecke <hare@suse.de>
Cc: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Signed-off-by: Bart Van Assche <bart.vanassche@wdc.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'block/blk-mq.c')
| -rw-r--r-- | block/blk-mq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/block/blk-mq.c b/block/blk-mq.c index a86899022683..f5c7dbcb954f 100644 --- a/block/blk-mq.c +++ b/block/blk-mq.c @@ -2997,7 +2997,7 @@ EXPORT_SYMBOL_GPL(blk_mq_update_nr_hw_queues); static bool blk_poll_stats_enable(struct request_queue *q) { if (test_bit(QUEUE_FLAG_POLL_STATS, &q->queue_flags) || - test_and_set_bit(QUEUE_FLAG_POLL_STATS, &q->queue_flags)) + blk_queue_flag_test_and_set(QUEUE_FLAG_POLL_STATS, q)) return true; blk_stat_add_callback(q, q->poll_cb); return false; |