D61449.1794529557.diff
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	diff --git a/sys/dev/hwpmc/hwpmc_mod.c b/sys/dev/hwpmc/hwpmc_mod.c
	--- a/sys/dev/hwpmc/hwpmc_mod.c
	+++ b/sys/dev/hwpmc/hwpmc_mod.c
	@@ -2892,8 +2892,14 @@
	*/
	pm->pm_state = PMC_STATE_DELETED;

	- /* Wait for the PMCs runcount to come to zero. */
	- pmc_wait_for_pmc_idle(pm);
	+ pmc_save_cpu_binding(&pb); /* quiesce_cpus() unbinds us */
	+ do {
	+ /* Wait for the PMCs runcount to come to zero. */
	+ pmc_wait_for_pmc_idle(pm);
	+ /* Let every CPU leave any switch-in/out using pm. */
	+ quiesce_all_cpus("pmcrel", PDROP);
	+ } while (counter_u64_fetch(pm->pm_runcount) != 0);
	+ pmc_restore_cpu_binding(&pb);

	/*
	* At this point the PMC is off all CPUs and cannot be freshly