[RFC] pthread_once: Use unified variant instead of custom x86_64/i386

[Andi Kleen]

> I haven't looked further at i386, but the custom code is pretty similar
> to the x86_64 variant.

(2) please.

Most of the x86 assembler in nptl/* in fact should be killed.

-Andi

> 
> 
> What do you all prefer?:
> 1) Keep the x86-specific assembler versions?
> 2) Remove the x86-specific assembler versions and split out the slow
> path?
> 2) Just remove the x86-specific assembler versions?

-- 
ak@linux.intel.com -- Speaking for myself only.