diff options
| author | Ming Lei | 2017-03-27 14:06:56 +0200 |
|---|---|---|
| committer | Jens Axboe | 2017-03-29 16:03:42 +0200 |
| commit | 5ed61d3f08d44937859dc537c5362ca293c98b04 (patch) | |
| tree | 02802c310ece8ac247bb016c5d58555612eea76e /include/linux/blk-mq.h | |
| parent | blk-mq: comment on races related with timeout handler (diff) | |
| download | kernel-qcow2-linux-5ed61d3f08d44937859dc537c5362ca293c98b04.tar.gz kernel-qcow2-linux-5ed61d3f08d44937859dc537c5362ca293c98b04.tar.xz kernel-qcow2-linux-5ed61d3f08d44937859dc537c5362ca293c98b04.zip | |
block: add a read barrier in blk_queue_enter()
Without the barrier, reading DEAD flag of .q_usage_counter
and reading .mq_freeze_depth may be reordered, then the
following wait_event_interruptible() may never return.
Reviewed-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: Ming Lei <tom.leiming@gmail.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Bart Van Assche <bart.vanassche@sandisk.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include/linux/blk-mq.h')
0 files changed, 0 insertions, 0 deletions