[PATCHv2] ARM64:Fix MINSIGSTKSZ and SIGSTKSZ

[Dave Martin]

On Tue, Oct 06, 2015 at 12:59:45PM +0200, Andreas Schwab wrote:
> Arnd Bergmann <arnd at arndb.de> writes:
> 
> > I think it makes sense to stick with the traditional definition
> > of MINSIGSTKSZ == "the minimum amount that you will always need,
> > add whatever you require yourself" and SIGSTKSZ == "Should be
> > enough for a couple of function calls".
> 
> The python3 testsuite wants to put two signal frames in a SIGSTKSZ
> stack.

Whether it's valid to expect SIGSTKSZ to be big enough for that is
debatable.

But I guess that SIGSTKSZ = MINSIGSTKSZ * 4 provides some insurance
against such assumptions (doubtless the python testsuite is not
the only code affected).

Cheers
---Dave