[PATCH] alpha, ia64, m68k, mips, sh, sparc: *_gnu_pltenter should allow modification of struct La_*_regs.

[David Miller]

From: Carlos O'Donell <carlos_odonell@mentor.com>
Date: Wed, 15 Aug 2012 20:34:01 -0400

> 
> The *_gnu_pltenter interface allows the modification of the incoming
> set of registers in struct La_*_regs, that is to say that the 5th
> argument of la_*_pltenter() is non-constant.
> 
> This was not always the case, but it is the case now and has been 
> since it was silently changed in commit 
> 2413fdba7a02ba8916f75d17199a6e9133a8f7b0.
> 
> Removing const from the 5th argument conforms with the Solaris interface:
> http://docs.oracle.com/cd/E19082-01/819-0690/chapter6-1242/index.html
> 
> Removing const for alpha, ia64, m68k, mips, sh, and sparc conforms
> with what the other machines in glibc are already doing.
> 
> I haven't tested this, but I don't think anything should go wrong
> given the wide usage of the non-const version right now. We could also
> do with a better test case that does something with the registers.
> For now I'm content to cleanup the definition in ldsodefs.h.
> 
> OK to commit?

Looks fine on the sparc side.