mm/hugetlb.c:1531:37: warning: Using plain integer as NULL pointer In the following kernel version: name: linux-next url: http://kernel.source.codeaurora.cn/pub/scm/linux/kernel/git/next/linux-next.git branch: next-20221121 commit: e4cd8d3ff7f9efeb97330e5e9b99eeb2a68f5cf9