如果 preempt_enable() 在 nmi 内会发生什么?
https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-8/-/blob/ccf40dfacd314ab0fea16cfc6f4eded1a08e2710/arch/x86/kernel/cpu/mce/core.c#L1331 preempt_enable()之前nmi_exit(),这是一个好的代码吗? if ((m.cs & 3) == 3) { /* If this triggers there is no way to recover. Die...