btrfs: delete btrfs_wait_space_cache_v1_finished

We used to use this in a few spots, but now we only use it directly
inside of block-group.c, so remove the helper and just open code where
we were using it.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/block-group.c

@@ -783,8 +783,10 @@ int btrfs_cache_block_group(struct btrfs_block_group *cache, bool wait)
 
 	btrfs_queue_work(fs_info->caching_workers, &caching_ctl->work);
 out:
+	/* REVIEW */
 	if (wait && caching_ctl)
 		ret = btrfs_caching_ctl_wait_done(cache, caching_ctl);
+		/* wait_event(caching_ctl->wait, space_cache_v1_done(cache)); */
 	if (caching_ctl)
 		btrfs_put_caching_control(caching_ctl);
 

fs/btrfs/block-group.h

@@ -309,8 +309,6 @@ void btrfs_reserve_chunk_metadata(struct btrfs_trans_handle *trans,
 u64 btrfs_get_alloc_profile(struct btrfs_fs_info *fs_info, u64 orig_flags);
 void btrfs_put_block_group_cache(struct btrfs_fs_info *info);
 int btrfs_free_block_groups(struct btrfs_fs_info *info);
-void btrfs_wait_space_cache_v1_finished(struct btrfs_block_group *cache,
-				struct btrfs_caching_control *caching_ctl);
 int btrfs_rmap_block(struct btrfs_fs_info *fs_info, u64 chunk_start,
 		       struct block_device *bdev, u64 physical, u64 **logical,
 		       int *naddrs, int *stripe_len);