D23276.id67054.diff
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D23276.id67054.diff
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	Index: head/sys/x86/x86/mp_x86.c
	===================================================================
	--- head/sys/x86/x86/mp_x86.c
	+++ head/sys/x86/x86/mp_x86.c
	@@ -1092,13 +1092,12 @@
	static void
	smp_after_idle_runnable(void *arg __unused)
	{
	- struct thread *idle_td;
	+ struct pcpu *pc;
	int cpu;

	for (cpu = 1; cpu < mp_ncpus; cpu++) {
	- idle_td = pcpu_find(cpu)->pc_idlethread;
	- while (atomic_load_int(&idle_td->td_lastcpu) == NOCPU &&
	- atomic_load_int(&idle_td->td_oncpu) == NOCPU)
	+ pc = pcpu_find(cpu);
	+ while (atomic_load_ptr(&pc->pc_curthread) == (uintptr_t)NULL)
	cpu_spinwait();
	kmem_free((vm_offset_t)bootstacks[cpu], kstack_pages *
	PAGE_SIZE);