diff options
Diffstat (limited to 'block/blk-mq-tag.c')
| -rw-r--r-- | block/blk-mq-tag.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/block/blk-mq-tag.c b/block/blk-mq-tag.c index ec2d11915142..60ac684c8b8c 100644 --- a/block/blk-mq-tag.c +++ b/block/blk-mq-tag.c @@ -75,6 +75,10 @@ void blk_mq_tag_wakeup_all(struct blk_mq_tags *tags, bool include_reserve) struct blk_mq_bitmap_tags *bt; int i, wake_index; + /* + * Make sure all changes prior to this are visible from other CPUs. + */ + smp_mb(); bt = &tags->bitmap_tags; wake_index = atomic_read(&bt->wake_index); for (i = 0; i < BT_WAIT_QUEUES; i++) { |