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SubjectRE: [PATCH 6/6] x86-mce: ensure the MCP timer is not already set in the mce_timer_fn.
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+	/* Ensure a CMCI interrupt can't preempt this. */
+ local_irq_save(flags);
if (mce_available(__this_cpu_ptr(&cpu_info))) {
machine_check_poll(MCP_TIMESTAMP,
&__get_cpu_var(mce_poll_banks));

Does this remove the problem that you fixed in part4? If a CMCI can
no longer interrupt a poll ... do we really need the locks you added?

-Tony


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