linux-kernel - Re: [PATCH v2 03/20] ARM: LPAE: use u32 instead of unsigned long for 32-bit ptes

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Message-id: <alpine.LFD.2.00.1011151706300.6448@xanadu.home>
Date:	Mon, 15 Nov 2010 17:07:14 -0500 (EST)
From:	Nicolas Pitre <nico@...xnic.net>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	Catalin Marinas <catalin.marinas@....com>,
	Russell King - ARM Linux <linux@....linux.org.uk>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Will Deacon <will.deacon@....com>
Subject: Re: [PATCH v2 03/20] ARM: LPAE: use u32 instead of unsigned long for
 32-bit ptes

On Mon, 15 Nov 2010, Arnd Bergmann wrote:

> On Monday 15 November 2010 10:39:30 Catalin Marinas wrote:
> > > There will be compiler warnings because u32 is unsigned int, and we
> > > print it as %08lx.  Generic code cases pte values to (long long) and
> > > prints them using %08llx.  We should do the same.
> > 
> > We still need some kind of macro because with LPAE we need %016llx
> > since the phys address can go to 40-bit and there are some additional
> > bits in the top word. Unless you'd like to always print 16 characters
> > even for 32-bit ptes (or if there is some other printk magic I'm not
> > aware of).
> 
> Why not just %010llx? That would just be two extra characters.

Not on non-LPAE build, please.


Nicolas
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