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| author | Ming Lei <tom.leiming@gmail.com> | 2017-03-27 15:06:56 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-03-29 17:03:42 +0300 |
| commit | 5ed61d3f08d44937859dc537c5362ca293c98b04 (patch) | |
| tree | 02802c310ece8ac247bb016c5d58555612eea76e /block/blk-mq.c | |
| parent | d9d149a39690184f63d74e3425c1e90b1d7e67d6 (diff) | |
| download | linux-5ed61d3f08d44937859dc537c5362ca293c98b04.tar.xz | |
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 'block/blk-mq.c')
0 files changed, 0 insertions, 0 deletions