IRQ_PEND_MCHK_EX
(1UL << IRQ_PEND_MCHK_EX))
case IRQ_PEND_MCHK_EX:
set_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);
case IRQ_PEND_MCHK_EX:
if (test_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs) ||
clear_bit(IRQ_PEND_MCHK_EX, &li->pending_irqs);