On 01/17/2018 10:48 AM, Martin Schwidefsky wrote:
>          rc = syscall(__NR_s390_modify_bp);
>          if (rc) {
>                  perror("s390_modify_bp");
>                  exit(EXIT_FAILURE);
>          }

Isn't this traditionally done through personality or prctl?

This looks like something other architectures may want as well.

Thanks,
Florian