[PATCH] btrfs: submit superblock io with REQ_META

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The superblock is also metadata of the filesystem so the relevant IO
should be tagged as such.

Signed-off-by: David Sterba <dsterba@xxxxxxxx>
---
 fs/btrfs/disk-io.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 90b967ae46d0..21b55e8caf33 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3433,9 +3433,11 @@ static int write_dev_supers(struct btrfs_device *device,
 		 */
 		if (i == 0) {
 			ret = btrfsic_submit_bh(REQ_OP_WRITE,
-						REQ_SYNC | REQ_FUA, bh);
+						REQ_SYNC | REQ_FUA | REQ_META,
+						bh);
 		} else {
-			ret = btrfsic_submit_bh(REQ_OP_WRITE, REQ_SYNC, bh);
+			ret = btrfsic_submit_bh(REQ_OP_WRITE,
+						REQ_SYNC | REQ_META, bh);
 		}
 		if (ret)
 			errors++;
-- 
2.14.0

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