ext4: ext4_get_reserved_space() must return bytes instead of blocks

(cherry picked from commit 8aa6790f)
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Reviewed-by: Eric Sandeen <sandeen@redhat.com>
Acked-by: Mingming Cao <cmm@us.ibm.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

fs/ext4/inode.c

@@ -1052,7 +1052,7 @@ qsize_t ext4_get_reserved_space(struct inode *inode)
 		EXT4_I(inode)->i_reserved_meta_blocks;
 	spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
 
-	return total;
+	return (total << inode->i_blkbits);
 }
 /*
  * Calculate the number of metadata blocks need to reserve