btrfs: move btrfs_should_fragment_free_space into block-group.c

This function uses functions that are not defined in block-group.h, move
it into block-group.c in order to keep the header clean.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
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

@@ -18,6 +18,18 @@
 #include "raid56.h"
 #include "zoned.h"
 
+#ifdef CONFIG_BTRFS_DEBUG
+int btrfs_should_fragment_free_space(struct btrfs_block_group *block_group)
+{
+	struct btrfs_fs_info *fs_info = block_group->fs_info;
+
+	return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
+		block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
+	       (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
+		block_group->flags &  BTRFS_BLOCK_GROUP_DATA);
+}
+#endif
+
 /*
  * Return target flags in extended format or 0 if restripe for this chunk_type
  * is not in progress

fs/btrfs/block-group.h

@@ -251,16 +251,7 @@ static inline bool btrfs_is_block_group_data_only(
 }
 
 #ifdef CONFIG_BTRFS_DEBUG
-static inline int btrfs_should_fragment_free_space(
-		struct btrfs_block_group *block_group)
-{
-	struct btrfs_fs_info *fs_info = block_group->fs_info;
-
-	return (btrfs_test_opt(fs_info, FRAGMENT_METADATA) &&
-		block_group->flags & BTRFS_BLOCK_GROUP_METADATA) ||
-	       (btrfs_test_opt(fs_info, FRAGMENT_DATA) &&
-		block_group->flags &  BTRFS_BLOCK_GROUP_DATA);
-}
+int btrfs_should_fragment_free_space(struct btrfs_block_group *block_group);
 #endif
 
 struct btrfs_block_group *btrfs_lookup_first_block_group(