align_shm(shmobj, __alignof__(struct lib_ring_buffer));
set_shmp(chanb->buf[i].shmp, zalloc_shm(shmobj, sizeof(struct lib_ring_buffer)));
buf = shmp(handle, chanb->buf[i].shmp);
align_shm(shmobj, __alignof__(struct lib_ring_buffer));
set_shmp(chanb->buf[i].shmp, zalloc_shm(shmobj, sizeof(struct lib_ring_buffer)));
buf = shmp(handle, chanb->buf[i].shmp);