diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index f1d36671bc2be2b7628c52f53f42451de4bdc03b..5d5ae6f44510a712aa45f622bbd0fb6ee92cbeea 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1618,7 +1618,8 @@ 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;
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 9e34f90552eef71dc3b13272573ac351fea63666..3278d46a7d652f6f6344b3a29e2f31d8cd4d02bf 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -5984,10 +5984,20 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 	vfs_flags = SB_LAZYTIME | SB_I_VERSION;
 	sb->s_flags = (sb->s_flags & ~vfs_flags) | (*flags & vfs_flags);
 
+	/*
+	 * Changing the DIOREAD_NOLOCK or DELALLOC mount options may cause
+	 * two calls to ext4_should_dioread_nolock() to return inconsistent
+	 * values, triggering WARN_ON in ext4_add_complete_io(). we grab
+	 * here s_writepages_rwsem to avoid race between writepages ops and
+	 * remount.
+	 */
+	percpu_down_write(&sbi->s_writepages_rwsem);
 	if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) {
 		err = -EINVAL;
+		percpu_up_write(&sbi->s_writepages_rwsem);
 		goto restore_opts;
 	}
+	percpu_up_write(&sbi->s_writepages_rwsem);
 
 	if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^
 	    test_opt(sb, JOURNAL_CHECKSUM)) {
@@ -6205,6 +6215,7 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 	return 0;
 
 restore_opts:
+	percpu_down_write(&sbi->s_writepages_rwsem);
 	sb->s_flags = old_sb_flags;
 	sbi->s_mount_opt = old_opts.s_mount_opt;
 	sbi->s_mount_opt2 = old_opts.s_mount_opt2;
@@ -6213,6 +6224,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 	sbi->s_commit_interval = old_opts.s_commit_interval;
 	sbi->s_min_batch_time = old_opts.s_min_batch_time;
 	sbi->s_max_batch_time = old_opts.s_max_batch_time;
+	percpu_up_write(&sbi->s_writepages_rwsem);
+
 	if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)
 		ext4_release_system_zone(sb);
 #ifdef CONFIG_QUOTA