D54474.diff
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	diff --git a/sys/kern/subr_smp.c b/sys/kern/subr_smp.c
	--- a/sys/kern/subr_smp.c
	+++ b/sys/kern/subr_smp.c
	@@ -554,7 +554,7 @@
	void (* teardown_func)(void *),
	void *arg)
	{
	- int curcpumap, i, ncpus = 0;
	+ int curcpumap, ncpus = 0;

	/* See comments in the !SMP case. */
	if (!smp_started) {
	@@ -575,10 +575,8 @@
	*/
	MPASS(curthread->td_md.md_spinlock_count == 0);

	- CPU_FOREACH(i) {
	- if (CPU_ISSET(i, &map))
	- ncpus++;
	- }
	+ CPU_AND(&map, &map, &all_cpus);
	+ ncpus = CPU_COUNT(&map);
	if (ncpus == 0)
	panic("ncpus is 0 with non-zero map");