[RFC v2 08/20] sysdeps/wait: Use waitid if avaliable

Florian Weimer fweimer@redhat.com
Mon Jul 8 12:37:00 GMT 2019


* Andreas Schwab:

> On Jul 08 2019, Florian Weimer <fweimer@redhat.com> wrote:
>
>> * Andreas Schwab:
>>
>>>> But this would still break if people actually go ahead with the removal
>>>> of the 32-bit system calls (something I think is quite impossible to do,
>>>> but some people seem to disagree).
>>>
>>> I'd expect that the current futex syscall will continue to work for all
>>> its subfunctions without absolute timestamp.
>>
>> I thought that RV32 just wouldn't have a futex system call at all?
>
> I'm talking about legacy 32-bit architectures.

Ah.  Yes, I one would hope that.

But there has been talk of a kernel option to remove it even there, and
a suggestion that glibc would try the 64-bit time_t system call first,
to see if it is available, and prefer that.

I think this would be quite … wrong.

Thanks,
Florian



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