f2fs: remove unnecessary __init_extent_tree

Added into the caller.
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

fs/f2fs/extent_cache.c

@@ -386,21 +386,6 @@ static struct extent_tree *__grab_extent_tree(struct inode *inode)
 	return et;
 }
 
-static struct extent_node *__init_extent_tree(struct f2fs_sb_info *sbi,
-				struct extent_tree *et, struct extent_info *ei)
-{
-	struct rb_node **p = &et->root.rb_root.rb_node;
-	struct extent_node *en;
-
-	en = __attach_extent_node(sbi, et, ei, NULL, p, true);
-	if (!en)
-		return NULL;
-
-	et->largest = en->ei;
-	et->cached_en = en;
-	return en;
-}
-
 static unsigned int __free_extent_tree(struct f2fs_sb_info *sbi,
 					struct extent_tree *et)
 {
@@ -460,8 +445,12 @@ static void __f2fs_init_extent_tree(struct inode *inode, struct page *ipage)
 	if (atomic_read(&et->node_cnt))
 		goto out;
 
-	en = __init_extent_tree(sbi, et, &ei);
+	en = __attach_extent_node(sbi, et, &ei, NULL,
+				&et->root.rb_root.rb_node, true);
 	if (en) {
+		et->largest = en->ei;
+		et->cached_en = en;
+
 		spin_lock(&sbi->extent_lock);
 		list_add_tail(&en->list, &sbi->extent_list);
 		spin_unlock(&sbi->extent_lock);