[PATCH 2/2] jmpbuf: Add paddings for target specific usage

[Florian Weimer]

On 11/08/2017 07:27 PM, H.J. Lu wrote:
> +/* The biggest signal number + 1  */
> +#define _JUMP_BUF_SIGSET_NSIG	257
> +/* Number of longs to hold all signals.  */
> +#define _JUMP_BUF_SIGSET_NWORDS \
> +  ((_JUMP_BUF_SIGSET_NSIG - 1 + 7) / (8 * sizeof (unsigned long int)))

Where does 257 come from?  65 or 129 I would understand considering the 
kernel sources, but 257 is odd.

I think it would be clearer to hard-code the array sizes and explain why 
the values where chosen in that way.

We also need a test that setprocmask does not read from the previously 
unused part.  I can move the existing next_to_fault bits to support/ if 
that would help.

Thanks,
Florian