JOBCTL_STOP_SIGMASK
WARN_ON_ONCE(signr & ~JOBCTL_STOP_SIGMASK);
int signr = current->jobctl & JOBCTL_STOP_SIGMASK;
JOBCTL_STOP_SIGMASK | JOBCTL_TRAPPING));
if (mask & JOBCTL_STOP_SIGMASK)
task->jobctl &= ~JOBCTL_STOP_SIGMASK;
unsigned long mask = current->jobctl & JOBCTL_STOP_SIGMASK;