linux-kernel - Re: x86_64 compile spewing hundreds of warnings

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Message-ID: <44CE2C61.4010809@google.com>
Date:	Mon, 31 Jul 2006 09:14:25 -0700
From:	Martin Bligh <mbligh@...gle.com>
To:	Martin Bligh <mbligh@...gle.com>
CC:	linux-kernel <linux-kernel@...r.kernel.org>,
	Andi Kleen <ak@...e.de>, Andy Whitcroft <apw@...dowen.org>
Subject: Re: x86_64 compile spewing hundreds of warnings - started 2.6.15-git8

Martin Bligh wrote:
> between 2.6.15-git7 and 2.6.15-git8 we started getting hundreds of 
> compile warnings:
> 
> -git7: http://test.kernel.org/20295/debug/test.log.0
> -git8: http://test.kernel.org/20402/debug/test.log.0
> 
> Warnings look like this:
> 
> include/asm/bitops.h: In function `load_elf32_binary':
> include/asm/bitops.h:30: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:30: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:65: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:65: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:30: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:30: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:65: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:65: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:30: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:30: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:65: warning: read-write constraint does not allow a 
> register
> include/asm/bitops.h:65: warning: read-write constraint does not allow a 
> register
> 
> 
> What do these mean? And how do we get rid of it?
> 
> Presumably caused by this:
> 
> http://www.kernel.org/git/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=636dd2b7def5c9c72551b51d4d516a65c269de08 
> 
> 
> or this:
> 
> http://www.kernel.org/git/gitweb.cgi?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=92934bcbf96bc9dc931c40ca5f1a57685b7b813b 
> 
> 

There were rumblings about changing these checks around a bit, but
nothing happened and the warnings are still there ... any chance of
fixing this?

M.

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