On Wed, Oct 18, 2017 at 11:59:16AM +0200, Ingo Molnar wrote:

* Byungchul Park [off-list ref] wrote:

quoted

diff --git a/block/bio.c b/block/bio.c
index 9a63597..0d4d6c0 100644
--- a/block/bio.c
+++ b/block/bio.c

@@ -941,7 +941,7 @@ int submit_bio_wait(struct bio *bio)
 {
 	struct submit_bio_ret ret;
 
-	init_completion(&ret.event);
+	init_completion_with_map(&ret.event, &bio->bi_disk->lockdep_map);
 	bio->bi_private = &ret;
 	bio->bi_end_io = submit_bio_wait_endio;
 	bio->bi_opf |= REQ_SYNC;

@@ -1382,7 +1382,7 @@ struct bio *bio_map_user_iov(struct request_queue *q,
 
 			if (len <= 0)
 				break;
-			
+
 			if (bytes > len)
 				bytes = len;
 

That's a spurious cleanup unrelated to this patch.

I will separate it. Thank you.