D6352.id16301.diff
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	Index: sys/dev/acpica/Osd/OsdSynch.c
	===================================================================
	--- sys/dev/acpica/Osd/OsdSynch.c
	+++ sys/dev/acpica/Osd/OsdSynch.c
	@@ -188,6 +188,23 @@
	}
	break;
	default:
	+ if (cold) {
	+ /*
	+ * Just spin polling the semaphore once a
	+ * millisecond.
	+ */
	+ while (!ACPISEM_AVAIL(as, Units)) {
	+ if (Timeout == 0) {
	+ status = AE_TIME;
	+ break;
	+ }
	+ Timeout--;
	+ mtx_unlock(&as->as_lock);
	+ DELAY(1000);
	+ mtx_lock(&as->as_lock);
	+ }
	+ break;
	+ }
	tmo = timeout2hz(Timeout);
	while (!ACPISEM_AVAIL(as, Units)) {
	prevtick = ticks;
	@@ -381,6 +398,23 @@
	}
	break;
	default:
	+ if (cold) {
	+ /*
	+ * Just spin polling the mutex once a
	+ * millisecond.
	+ */
	+ while (!ACPIMTX_AVAIL(am)) {
	+ if (Timeout == 0) {
	+ status = AE_TIME;
	+ break;
	+ }
	+ Timeout--;
	+ mtx_unlock(&am->am_lock);
	+ DELAY(1000);
	+ mtx_lock(&am->am_lock);
	+ }
	+ break;
	+ }
	tmo = timeout2hz(Timeout);
	while (!ACPIMTX_AVAIL(am)) {
	prevtick = ticks;