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-rw-r--r--fs/ext4/ext4.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 9653aab5e9f4..733abaf805fa 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1674,7 +1674,8 @@ struct ext4_sb_info {
/*
* Barrier between writepages ops and changing any inode's JOURNAL_DATA
- * or EXTENTS flag.
+ * or EXTENTS flag or between writepages ops and changing DELALLOC or
+ * DIOREAD_NOLOCK mount options on remount.
*/
struct percpu_rw_semaphore s_writepages_rwsem;
struct dax_device *s_daxdev;