diff mbox series

[09/15] block: move sync_blockdev from __blkdev_put to blkdev_put

Message ID 20210330161727.2297292-10-hch@lst.de (mailing list archive)
State New, archived
Headers show
Series [01/15] md: remove the code to flush an old instance in md_open | expand

Commit Message

Christoph Hellwig March 30, 2021, 4:17 p.m. UTC
Do the early unlocked syncing even earlier to move more code out of
the recursive path.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
 fs/block_dev.c | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)
diff mbox series

Patch

diff --git a/fs/block_dev.c b/fs/block_dev.c
index d732001285201a..691eef20a7ced7 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1547,16 +1547,6 @@  static void __blkdev_put(struct block_device *bdev, fmode_t mode, int for_part)
 	struct gendisk *disk = bdev->bd_disk;
 	struct block_device *victim = NULL;
 
-	/*
-	 * Sync early if it looks like we're the last one.  If someone else
-	 * opens the block device between now and the decrement of bd_openers
-	 * then we did a sync that we didn't need to, but that's not the end
-	 * of the world and we want to avoid long (could be several minute)
-	 * syncs while holding the mutex.
-	 */
-	if (bdev->bd_openers == 1)
-		sync_blockdev(bdev);
-
 	mutex_lock_nested(&bdev->bd_mutex, for_part);
 	if (for_part)
 		bdev->bd_part_count--;
@@ -1583,6 +1573,16 @@  void blkdev_put(struct block_device *bdev, fmode_t mode)
 {
 	struct gendisk *disk = bdev->bd_disk;
 
+	/*
+	 * Sync early if it looks like we're the last one.  If someone else
+	 * opens the block device between now and the decrement of bd_openers
+	 * then we did a sync that we didn't need to, but that's not the end
+	 * of the world and we want to avoid long (could be several minute)
+	 * syncs while holding the mutex.
+	 */
+	if (bdev->bd_openers == 1)
+		sync_blockdev(bdev);
+
 	mutex_lock(&bdev->bd_mutex);
 
 	if (mode & FMODE_EXCL) {