f2fs: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.

Cc: Jaegeuk Kim <jaegeuk@kernel.org>
Cc: Chao Yu <yuchao0@huawei.com>
Cc: linux-f2fs-devel@lists.sourceforge.net
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index bc32a103..ea514ac 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -3550,9 +3550,7 @@ static int __init init_f2fs_fs(void)
 	err = register_filesystem(&f2fs_fs_type);
 	if (err)
 		goto free_shrinker;
-	err = f2fs_create_root_stats();
-	if (err)
-		goto free_filesystem;
+	f2fs_create_root_stats();
 	err = f2fs_init_post_read_processing();
 	if (err)
 		goto free_root_stats;
@@ -3560,7 +3558,6 @@ static int __init init_f2fs_fs(void)
 
 free_root_stats:
 	f2fs_destroy_root_stats();
-free_filesystem:
 	unregister_filesystem(&f2fs_fs_type);
 free_shrinker:
 	unregister_shrinker(&f2fs_shrinker_info);