KTR_SIGMASK
if (!KTRPOINT(l->l_proc, KTR_SIGMASK))
if (ktealloc(&kte, (void *)&ktp, l, KTR_SIGMASK, sizeof(*ktp)))
#define KTRFAC_SIGMASK (1<<KTR_SIGMASK)
case KTR_SIGMASK:
case KTR_SIGMASK: