CKSEG_CKSUM
NULL, NULL, CKSEG_CKSUM, NULL);
if (flags & CKSEG_CKSUM) {
if (flags & CKSEG_CKSUM) {
if (flags & CKSEG_CKSUM) {
if (flags & CKSEG_CKSUM) {
cred, &flags, l, NULL, NULL, CKSEG_CKSUM, NULL);