page_owner_sort was introduced since commit 48c96a3685 ("mm/page_owner:
keep track of page owners"), and we should ignore it.
Link: https://lkml.kernel.org/r/tencent_F6CAC0ABE16839E2B2419BD07316DA65BB06@qq.com
Signed-off-by: Rong Tao <rongtao@cestc.cn>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>