btrfs: Rename __btrfs_free_reserved_extent to btrfs_pin_reserved_extent

__btrfs_free_reserved_extent now performs the actions of
btrfs_free_and_pin_reserved_extent. But this name is a bit of a
misnomer, since the extent is not really freed but just pinned. Reflect
this in the new name. No semantics changes.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>

fs/btrfs/ctree.h

@@ -2449,8 +2449,8 @@ int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
 
 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
 			       u64 start, u64 len, int delalloc);
-int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
-				       u64 start, u64 len);
+int btrfs_pin_reserved_extent(struct btrfs_fs_info *fs_info, u64 start,
+			      u64 len);
 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,

fs/btrfs/extent-tree.c

@@ -4165,12 +4165,10 @@ int btrfs_reserve_extent(struct btrfs_root *root, u64 ram_bytes,
 	return ret;
 }
 
-static int __btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
-					u64 start, u64 len,
-					int pin, int delalloc)
+int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
+			       u64 start, u64 len, int delalloc)
 {
 	struct btrfs_block_group *cache;
-	int ret = 0;
 
 	cache = btrfs_lookup_block_group(fs_info, start);
 	if (!cache) {
@@ -4179,15 +4177,18 @@ static int __btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
 		return -ENOSPC;
 	}
 
-	ret = pin_down_extent(cache, start, len, 1);
+	btrfs_add_free_space(cache, start, len);
+	btrfs_free_reserved_bytes(cache, len, delalloc);
+	trace_btrfs_reserved_extent_free(fs_info, start, len);
+
 	btrfs_put_block_group(cache);
-	return ret;
+	return 0;
 }
 
-int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
-			       u64 start, u64 len, int delalloc)
+int btrfs_pin_reserved_extent(struct btrfs_fs_info *fs_info, u64 start, u64 len)
 {
 	struct btrfs_block_group *cache;
+	int ret = 0;
 
 	cache = btrfs_lookup_block_group(fs_info, start);
 	if (!cache) {
@@ -4195,18 +4196,9 @@ int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
 		return -ENOSPC;
 	}
 
-	btrfs_add_free_space(cache, start, len);
-	btrfs_free_reserved_bytes(cache, len, delalloc);
-	trace_btrfs_reserved_extent_free(fs_info, start, len);
-
+	ret = pin_down_extent(cache, start, len, 1);
 	btrfs_put_block_group(cache);
-	return 0;
-}
-
-int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
-				       u64 start, u64 len)
-{
-	return __btrfs_free_reserved_extent(fs_info, start, len, 1, 0);
+	return ret;
 }
 
 static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans,

fs/btrfs/tree-log.c

@@ -2732,9 +2732,8 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
 
 				WARN_ON(root_owner !=
 					BTRFS_TREE_LOG_OBJECTID);
-				ret = btrfs_free_and_pin_reserved_extent(
-							fs_info, bytenr,
-							blocksize);
+				ret = btrfs_pin_reserved_extent(fs_info,
+							bytenr, blocksize);
 				if (ret) {
 					free_extent_buffer(next);
 					return ret;
@@ -2815,8 +2814,7 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
 				}
 
 				WARN_ON(root_owner != BTRFS_TREE_LOG_OBJECTID);
-				ret = btrfs_free_and_pin_reserved_extent(
-						fs_info,
+				ret = btrfs_pin_reserved_extent(fs_info,
 						path->nodes[*level]->start,
 						path->nodes[*level]->len);
 				if (ret)
@@ -2898,8 +2896,8 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
 
 			WARN_ON(log->root_key.objectid !=
 				BTRFS_TREE_LOG_OBJECTID);
-			ret = btrfs_free_and_pin_reserved_extent(fs_info,
-							next->start, next->len);
+			ret = btrfs_pin_reserved_extent(fs_info, next->start,
+							next->len);
 			if (ret)
 				goto out;
 		}