SWI_TQ
register_swi(SWI_TQ, taskqueue_swi_run, NULL, "swi_taskq", NULL, -1));
register_swi_mp(SWI_TQ, taskqueue_swi_mp_run, NULL, "swi_mp_taskq", NULL,
#define SWI_TQ_PENDING (1 << (SWI_TQ - FIRST_SOFTINT))