linux-kernel - Re: [PATCH 4 of 7] x86/paravirt: selectively save/restore regs around pvops calls

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Date:	Fri, 30 Jan 2009 10:57:27 +1030
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Ingo Molnar <mingo@...e.hu>, linux-kernel@...r.kernel.org,
	"Xen-devel" <xen-devel@...ts.xensource.com>,
	"the arch/x86 maintainers" <x86@...nel.org>,
	Ian Campbell <ian.campbell@...rix.com>,
	Zachary Amsden <zach@...are.com>,
	Ravikiran Thirumalai <kiran@...lemp.com>
Subject: Re: [PATCH 4 of 7] x86/paravirt: selectively save/restore regs around pvops calls

On Thursday 29 January 2009 20:00:34 Jeremy Fitzhardinge wrote:
> Rusty Russell wrote:
> > It's kind of messy.  Can we do something clever here with token pasting?
> 
> I tried a few things, but no.  Passing in just RAX, and then pasting 
> CLBR_##reg works, and the assembler accepts %RAX - but - the asm code 
> also #defines RAX <some stack offset>, so the assembler ends up seeing 
> %48.  I considered renaming all the CLBR_ defines to CLBR_rax, but that 
> looks unhappy too.  So I stayed with this.

OK, then Acked-by: Rusty Russell <rusty@...tcorp.com.au> on this one too.

Thanks,
Rusty.
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