[PATCH] erofs: fix erofs_get_meta_page locking by a cleanup

[Gao Xiang]

Hi,

On Sun, Sep 22, 2019 at 04:32:05PM +0800, kbuild test robot wrote:
> 
> All warnings (new ones prefixed by >>):
> 
>    fs//erofs/data.c: In function 'erofs_get_meta_page':
> >> fs//erofs/data.c:43:10: warning: return makes pointer from integer without a cast [-Wint-conversion]
>       return PTR_ERR(page);

It was already fixed in v2.

Thanks,
Gao Xiang