IPCID_TO_IX
msqix = IPCID_TO_IX(msqid);
msqix = IPCID_TO_IX(msqid);
msqix = IPCID_TO_IX(msqid);
semid = IPCID_TO_IX(usemid); /* Convert back to zero origin */
semidx = IPCID_TO_IX(semid);
segnum = is_shmid ? IPCID_TO_IX(arg) : arg;
segnum = IPCID_TO_IX(shmmap_s->shmid);
&shmsegs[IPCID_TO_IX(shmmap_s->shmid)]);
shm_remove(shmseg, IPCID_TO_IX(shmid));
KASSERT(IPCID_TO_IX(shmmap_s->shmid) >= 0 &&
IPCID_TO_IX(shmmap_s->shmid) < shmalloced,
IPCID_TO_IX(shmmap_s->shmid), shmalloced));
shmsegs[IPCID_TO_IX(shmmap_s->shmid)].u.shm_nattch++;