btrfs_double_extent_lock 3254 fs/btrfs/ioctl.c 	btrfs_double_extent_lock(src, loff, dst, dst_loff, len);
btrfs_double_extent_lock 3811 fs/btrfs/ioctl.c 	btrfs_double_extent_lock(src, off, inode, destoff, len);