Fix mcontext_t sigcontext namespace (bug 21457)

[Chris Metcalf]

On 6/29/2017 3:51 PM, Joseph Myers wrote:
> On Mon, 26 Jun 2017, Joseph Myers wrote:
>
>> On Mon, 26 Jun 2017, Zack Weinberg wrote:
>>
>>> Independent of that, this is finicky enough and has enough
>>> kernel-interface implications that I think it had better have
>>> architecture maintainer reviews for, at least, all architectures where
>>> you copied the contents of struct sigcontext into the definition of
>>> mcontext_t.
>> Ping for
>> architecture maintainers for aarch64, alpha, hppa, ia64, microblaze, tile.
> Ping again, both architecture-maintainer and general patch.  (Note email
> to the microblaze maintainer bounced.)  All the other fixes for this bug
> are now in, so this patch allows 11 of the 13 miscellaneous conform/
> XFAILs to be removed (and the other two are just ordinary bugs about the
> details of what's exposed for particular old standard versions).

The tile architecture version looks good to me.

-- 
Chris Metcalf, Mellanox Technologies
http://www.mellanox.com