./arch/alpha/kernel/smp.c:271:39-40: WARNING comparing pointer to 0 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-20230207 commit: 49a8133221c71b935f36a7c340c0271c2a9ee2db