diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 779ef4c..4d8ebbe 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2612,11 +2612,14 @@
 	struct blk_plug plug;
 	bool give_up_on_write = false;
 
+	percpu_down_read(&sbi->s_journal_flag_rwsem);
 	trace_ext4_writepages(inode, wbc);
 
-	if (dax_mapping(mapping))
-		return dax_writeback_mapping_range(mapping, inode->i_sb->s_bdev,
-						   wbc);
+	if (dax_mapping(mapping)) {
+		ret = dax_writeback_mapping_range(mapping, inode->i_sb->s_bdev,
+						  wbc);
+		goto out_writepages;
+	}
 
 	/*
 	 * No pages to write? This is mainly a kludge to avoid starting
@@ -2786,6 +2789,7 @@
 out_writepages:
 	trace_ext4_writepages_result(inode, wbc, ret,
 				     nr_to_write - wbc->nr_to_write);
+	percpu_up_read(&sbi->s_journal_flag_rwsem);
 	return ret;
 }
 
@@ -5436,6 +5440,7 @@
 	journal_t *journal;
 	handle_t *handle;
 	int err;
+	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 
 	/*
 	 * We have to be very careful here: changing a data block's
@@ -5475,6 +5480,7 @@
 		}
 	}
 
+	percpu_down_write(&sbi->s_journal_flag_rwsem);
 	jbd2_journal_lock_updates(journal);
 
 	/*
@@ -5491,6 +5497,7 @@
 		err = jbd2_journal_flush(journal);
 		if (err < 0) {
 			jbd2_journal_unlock_updates(journal);
+			percpu_up_write(&sbi->s_journal_flag_rwsem);
 			ext4_inode_resume_unlocked_dio(inode);
 			return err;
 		}
@@ -5499,6 +5506,8 @@
 	ext4_set_aops(inode);
 
 	jbd2_journal_unlock_updates(journal);
+	percpu_up_write(&sbi->s_journal_flag_rwsem);
+
 	if (val)
 		up_write(&EXT4_I(inode)->i_mmap_sem);
 	ext4_inode_resume_unlocked_dio(inode);