SI_BOOT2_PROC0
SYSINIT(p0init, SI_BOOT2_PROC0, SI_ORDER_FIRST, proc0_init, NULL);
SYSINIT(spinsysinit, SI_BOOT2_PROC0, SI_ORDER_FIRST, spinlock_sysinit, NULL);
SYSINIT(initshutdown, SI_BOOT2_PROC0, SI_ORDER_ANY,