From: Pavel Begunkov <asml.silence@xxxxxxxxx>
Don't call flush_plug_callbacks if there are no plug callbacks.
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
[hch: split from a larger patch]
Signed-off-by: Christoph Hellwig <hch@xxxxxx>
---
block/blk-core.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/block/blk-core.c b/block/blk-core.c
index e6ad5b51d0c3d..63fee1f82bd7d 100644
--- a/block/blk-core.c
+++ b/block/blk-core.c
@@ -1639,8 +1639,8 @@ EXPORT_SYMBOL(blk_check_plugged);
void blk_flush_plug_list(struct blk_plug *plug, bool from_schedule)
{
- flush_plug_callbacks(plug, from_schedule);
-
+ if (!list_empty(&plug->cb_list))
+ flush_plug_callbacks(plug, from_schedule);
if (!rq_list_empty(plug->mq_list))
blk_mq_flush_plug_list(plug, from_schedule);
if (unlikely(!from_schedule && plug->cached_rq))
--
2.30.2
