MCL_FUTURE
if (mlockall(MCL_CURRENT | MCL_FUTURE) == -1) {
if ((val & ~(MCL_CURRENT|MCL_FUTURE)) == 0) {
if (val & MCL_FUTURE)
e = mlockall(MCL_FUTURE);
if (mlockall(MCL_CURRENT | MCL_FUTURE) == 0) {
if ((uintptr_t)arg & ~(MCL_FUTURE|MCL_CURRENT) ||
if (arg & MCL_FUTURE) {