ACPIMTX_AVAIL
if (ACPIMTX_AVAIL(am))
if (!ACPIMTX_AVAIL(am))
while (!ACPIMTX_AVAIL(am)) {
while (!ACPIMTX_AVAIL(am)) {
while (!ACPIMTX_AVAIL(am)) {
if (ACPIMTX_AVAIL(am))
if (ACPIMTX_AVAIL(am))
if (am->am_waiters > 0 && ACPIMTX_AVAIL(am))