btrfs_delete_raid_extent
ret = btrfs_delete_raid_extent(trans, bytenr, num_bytes);
int btrfs_delete_raid_extent(struct btrfs_trans_handle *trans, u64 start, u64 length);
ret = btrfs_delete_raid_extent(trans, logical, len);
ret = btrfs_delete_raid_extent(trans, hole_start, hole_len);
ret = btrfs_delete_raid_extent(trans, logical1, len1);
ret = btrfs_delete_raid_extent(trans, logical3, len3);
ret = btrfs_delete_raid_extent(trans, logical1, len1 + len2);
ret = btrfs_delete_raid_extent(trans, logical3, len3);
ret = btrfs_delete_raid_extent(trans, hole_start, hole_len);
ret = btrfs_delete_raid_extent(trans, logical1, len1);
ret = btrfs_delete_raid_extent(trans, logical2, len2);
ret = btrfs_delete_raid_extent(trans, logical1 + SZ_512K, SZ_1M);
ret = btrfs_delete_raid_extent(trans, logical1, SZ_512K);
ret = btrfs_delete_raid_extent(trans, logical2 + SZ_512K, SZ_512K);
ret = btrfs_delete_raid_extent(trans, logical, SZ_16K);
ret = btrfs_delete_raid_extent(trans, logical + SZ_16K, SZ_48K);
ret = btrfs_delete_raid_extent(trans, logical + SZ_48K, SZ_16K);
ret = btrfs_delete_raid_extent(trans, logical, len);
ret = btrfs_delete_raid_extent(trans, logical, len);