linux-kernel - Re: [patch for 4.0] x86: silence warning in /dev/mem support

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Message-ID: <20150417084846.GB13741@amd>
Date:	Fri, 17 Apr 2015 10:48:46 +0200
From:	Pavel Machek <pavel@....cz>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
	jgross@...e.com, roland@...estorage.com, akpm@...ux-foundation.org,
	linux-kernel@...r.kernel.org
Subject: Re: [patch for 4.0] x86: silence warning in /dev/mem support

Hi!

> >   CC      arch/x86/mm/ioremap.o
> >   arch/x86/mm/ioremap.c: In function ‘xlate_dev_mem_ptr’:
> >   arch/x86/mm/ioremap.c:363:10: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast]
> >      addr = (void *)((unsigned long)addr | (phys & ~PAGE_MASK));
> >                ^
> >   LD      arch/x86/mm/built-in.o
> > 		 
> > pavel@amd:/data/l/linux$ gcc --version
> > gcc (Debian 4.9.2-10) 4.9.2
> 
> So this code has not been changed for a year or so in theory, and I've 
> never seen this warning with GCC 4.9.1. I'm wondering how it 
> triggered. Could you send me your .config that triggers this?

Config sent in private email. 32-bit kernel.

Best regards,
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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