btrfs: temporarily export inc_block_group_ro

This is used in a few logical parts of the block group code, temporarily
export it so we can move things in pieces.
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.h

@@ -185,4 +185,6 @@ static inline int btrfs_block_group_cache_done(
 		cache->cached == BTRFS_CACHE_ERROR;
 }
 
+int __btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache, int force);
+
 #endif /* BTRFS_BLOCK_GROUP_H */

fs/btrfs/extent-tree.c

@@ -6697,7 +6697,7 @@ static u64 update_block_group_flags(struct btrfs_fs_info *fs_info, u64 flags)
  * data in this block group. That check should be done by relocation routine,
  * not this function.
  */
-static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
+int __btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
 {
 	struct btrfs_space_info *sinfo = cache->space_info;
 	u64 num_bytes;
@@ -6807,14 +6807,14 @@ int btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache)
 			goto out;
 	}
 
-	ret = inc_block_group_ro(cache, 0);
+	ret = __btrfs_inc_block_group_ro(cache, 0);
 	if (!ret)
 		goto out;
 	alloc_flags = get_alloc_profile(fs_info, cache->space_info->flags);
 	ret = btrfs_chunk_alloc(trans, alloc_flags, CHUNK_ALLOC_FORCE);
 	if (ret < 0)
 		goto out;
-	ret = inc_block_group_ro(cache, 0);
+	ret = __btrfs_inc_block_group_ro(cache, 0);
 out:
 	if (cache->flags & BTRFS_BLOCK_GROUP_SYSTEM) {
 		alloc_flags = update_block_group_flags(fs_info, cache->flags);
@@ -7347,7 +7347,7 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info)
 
 		set_avail_alloc_bits(info, cache->flags);
 		if (btrfs_chunk_readonly(info, cache->key.objectid)) {
-			inc_block_group_ro(cache, 1);
+			__btrfs_inc_block_group_ro(cache, 1);
 		} else if (btrfs_block_group_used(&cache->item) == 0) {
 			ASSERT(list_empty(&cache->bg_list));
 			btrfs_mark_bg_unused(cache);
@@ -7368,11 +7368,11 @@ int btrfs_read_block_groups(struct btrfs_fs_info *info)
 		list_for_each_entry(cache,
 				&space_info->block_groups[BTRFS_RAID_RAID0],
 				list)
-			inc_block_group_ro(cache, 1);
+			__btrfs_inc_block_group_ro(cache, 1);
 		list_for_each_entry(cache,
 				&space_info->block_groups[BTRFS_RAID_SINGLE],
 				list)
-			inc_block_group_ro(cache, 1);
+			__btrfs_inc_block_group_ro(cache, 1);
 	}
 
 	btrfs_init_global_block_rsv(info);
@@ -7911,7 +7911,7 @@ void btrfs_delete_unused_bgs(struct btrfs_fs_info *fs_info)
 		spin_unlock(&block_group->lock);
 
 		/* We don't want to force the issue, only flip if it's ok. */
-		ret = inc_block_group_ro(block_group, 0);
+		ret = __btrfs_inc_block_group_ro(block_group, 0);
 		up_write(&space_info->groups_sem);
 		if (ret < 0) {
 			ret = 0;