btrfs: temporarily export btrfs_get_restripe_target

This gets used by a few different logical chunks of the block group
code, export it while we move things around.
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

@@ -197,5 +197,6 @@ static inline int btrfs_block_group_cache_done(
 }
 
 int __btrfs_inc_block_group_ro(struct btrfs_block_group_cache *cache, int force);
+u64 btrfs_get_restripe_target(struct btrfs_fs_info *fs_info, u64 flags);
 
 #endif /* BTRFS_BLOCK_GROUP_H */

fs/btrfs/extent-tree.c

@@ -3048,7 +3048,7 @@ int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr)
  *
  * should be called with balance_lock held
  */
-static u64 get_restripe_target(struct btrfs_fs_info *fs_info, u64 flags)
+u64 btrfs_get_restripe_target(struct btrfs_fs_info *fs_info, u64 flags)
 {
 	struct btrfs_balance_control *bctl = fs_info->balance_ctl;
 	u64 target = 0;
@@ -3089,7 +3089,7 @@ static u64 btrfs_reduce_alloc_profile(struct btrfs_fs_info *fs_info, u64 flags)
 	 * try to reduce to the target profile
 	 */
 	spin_lock(&fs_info->balance_lock);
-	target = get_restripe_target(fs_info, flags);
+	target = btrfs_get_restripe_target(fs_info, flags);
 	if (target) {
 		/* pick target profile only if it's already available */
 		if ((flags & target) & BTRFS_EXTENDED_PROFILE_MASK) {
@@ -6538,7 +6538,7 @@ static u64 update_block_group_flags(struct btrfs_fs_info *fs_info, u64 flags)
 	 * if restripe for this chunk_type is on pick target profile and
 	 * return, otherwise do the usual balance
 	 */
-	stripped = get_restripe_target(fs_info, flags);
+	stripped = btrfs_get_restripe_target(fs_info, flags);
 	if (stripped)
 		return extended_to_chunk(stripped);