AF_INTERRUPTS_ON
set_bit(AF_INTERRUPTS_ON, &ha->flags);
clear_bit(AF_INTERRUPTS_ON, &ha->flags);
test_bit(AF_INTERRUPTS_ON, &ha->flags) &&
if (test_bit(AF_INTERRUPTS_ON, &ha->flags) &&
set_bit(AF_INTERRUPTS_ON, &ha->flags);
if (test_and_clear_bit(AF_INTERRUPTS_ON, &ha->flags))