btrfs_inode_clear_file_extent_range
int btrfs_inode_clear_file_extent_range(struct btrfs_inode *inode, u64 start,
ret = btrfs_inode_clear_file_extent_range(inode,
ret = btrfs_inode_clear_file_extent_range(inode, cur_offset,
ret = btrfs_inode_clear_file_extent_range(control->inode,
btrfs_inode_clear_file_extent_range(inode, 0, (u64)-1);