linux-kernel - Re: gcc 4.5.1 / as 2.20.51.0.11 miscompiling drivers/char/i8k.c ?

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Message-ID: <4CE16F86.40808@xs4all.nl>
Date:	Mon, 15 Nov 2010 18:36:06 +0100
From:	Jim Bos <jim876@...all.nl>
To:	Andi Kleen <andi@...stfloor.org>
CC:	Jakub Jelinek <jakub@...hat.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	James Cloos <cloos@...loos.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Andreas Schwab <schwab@...hat.com>,
	Michael Matz <matz@...e.de>,
	Dave Korn <dave.korn.cygwin@...il.com>,
	Richard Guenther <richard.guenther@...il.com>, gcc@....gnu.org
Subject: Re: gcc 4.5.1 / as 2.20.51.0.11 miscompiling drivers/char/i8k.c ?

On 11/15/2010 12:37 PM, Andi Kleen wrote:
>> Guess we need somebody who actually reported the problem, state what
>> gcc was actually used and post preprocessed source, gcc options
>> from his case.
> 
> Jim Bos,
> Can you please supply that? 
> 
> Please use 
> 
> rm drivers/char/i8k.o
> make V=1 drivers/char/i8k.o
> make drivers/char/i8k.i  
> 
> and supply the .i file and the output of the first make line
> 
> Thanks,
> -Andi
> 

Andi,

See attached, note this is the vanilla 2.6.36 i8k.c (without any patch).
And to be 100% sure, if I build this (make drivers/char/i8k.ko) it won't
work.

[ The i8k.i is rather big, even gzipped 80k, not sure if it'll bounce ]

_
Jim


View attachment "outp.txt" of type "text/plain" (3674 bytes)

Download attachment "i8k.i.gz" of type "application/gzip" (79922 bytes)