force_cow        1714 fs/btrfs/inode.c 	int force_cow = need_force_cow(inode, start, end);
force_cow        1717 fs/btrfs/inode.c 	if (BTRFS_I(inode)->flags & BTRFS_INODE_NODATACOW && !force_cow) {
force_cow        1720 fs/btrfs/inode.c 	} else if (BTRFS_I(inode)->flags & BTRFS_INODE_PREALLOC && !force_cow) {