On Wednesday 26 June 2013 18:59, Ralf Baechle wrote:
> On Wed, Jun 26, 2013 at 06:14:52PM +0200, Oleg Nesterov wrote:
>
> > Or simply remove the BUG_ON(), this can equally confuse wait(status).
> > 128 & 0x7f == 0.
> >
> > Still I think it would be better to change _NSIG on mips.
>
> If it was that easy. That's going to outright break binary compatibility,
> see kernel/signal.c:
>
> SYSCALL_DEFINE4(rt_sigprocmask, int, how, sigset_t __user *, nset,
> sigset_t __user *, oset, size_t, sigsetsize)
> {
> sigset_t old_set, new_set;
> int error;
>
> /* XXX: Don't preclude handling different sized sigset_t's. */
> if (sigsetsize != sizeof(sigset_t))
> return -EINVAL;
>
> There are several more more syscalls performing tests like the above.
Reducing _NSIG to 127 (or 126) doesn't change sigset_t, so should be fine wrt above.
