Symbol: SI_SUB_PROP
sys/kern/vfs_nlookup.c
1961
SYSINIT(collect_nlookup, SI_SUB_PROP, SI_ORDER_ANY, nlookup_collect_init, 0);
sys/libprop/prop_object_impl.h
281
SYSINIT(pp##_init, SI_SUB_PROP, SI_ORDER_ANY, pp##_init, NULL)