linux-kernel - Re: [uml-devel] arch/um/sys-i386/setjmp.S: useless #ifdef

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Message-ID: <20060822174233.GA5471@ccure.user-mode-linux.org>
Date:	Tue, 22 Aug 2006 13:42:33 -0400
From:	Jeff Dike <jdike@...toit.com>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	linux-kernel@...r.kernel.org,
	user-mode-linux-devel@...ts.sourceforge.net
Subject: Re: [uml-devel] arch/um/sys-i386/setjmp.S: useless #ifdef _REGPARM's?

On Tue, Aug 22, 2006 at 06:07:41PM +0200, Adrian Bunk wrote:
> I didn't find a corresponding open bug in the gcc Bugzilla.
> 
> Can someone verify whether it's still present, and if yes, open a gcc 
> bug?

Yup, it's easy enough to check.

> It's set globally in arch/i386/Makefile:
>   cflags-$(CONFIG_REGPARM) += -mregparm=3

IIRC, there used to be functions explicitly declared as __regparam or
something, and that's what I was grepping for.  Does this turn every
function with three or fewer parameters into a regparam function?

> That's not pulled by UML, but if there are no outstanding problems with 
> regparm, we could both enable it uncomditionally on i386 and enable it
> on UML/i386.

That shouldn't be a problem.

				Jeff
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