[PATCH -next] btrfs: Make init_tree_roots static

[YueHaibing]

Fix sparse warning:

fs/btrfs/disk-io.c:2534:12: warning:
 symbol 'init_tree_roots' was not declared. Should it be static?

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Signed-off-by: YueHaibing <yuehaibing@xxxxxxxxxx>
---
 fs/btrfs/disk-io.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index d078276..cb187f5 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -2531,7 +2531,7 @@ static int btrfs_validate_write_super(struct btrfs_fs_info *fs_info,
 	return ret;
 }
 
-int __cold init_tree_roots(struct btrfs_fs_info *fs_info)
+static int __cold init_tree_roots(struct btrfs_fs_info *fs_info)
 {
 	int backup_index = find_newest_super_backup(fs_info);
 	struct btrfs_super_block *sb = fs_info->super_copy;
-- 
2.7.4