kern_kldload
kern_kldload(curthread, modname, NULL); \
error = kern_kldload(td, pathname, &fileid);
*error = kern_kldload(td, fstype, &fileid);
(void)kern_kldload(curthread, modname, NULL);
error = kern_kldload(curthread, filename, &fileid);
int kern_kldload(struct thread *td, const char *file, int *fileid);