linux-kernel - Re: [RFC][PATCH] introduce ptr

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Message-ID: <1282233186.1713.10.camel@leonhard>
Date:	Fri, 20 Aug 2010 00:53:06 +0900
From:	Namhyung Kim <namhyung@...il.com>
To:	Andi Kleen <andi@...stfloor.org>
Cc:	Arnd Bergmann <arnd@...db.de>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC][PATCH] introduce ptr_diff()

2010-08-19 (목), 14:23 +0200, Andi Kleen:
> IMHO it would be better to simply disable the warning in sparse instead
> of uglying the code just to work around sparse bogosity. It doesnt' seem
> to make much sense. A subtraction followed by a shift is not expensive.
> 
> -Andi
> 

I'm curious who turns on that switch. -Wptr-subtraction-blows is turned
off by default, I didn't use CF variable at build time and I could not
find any reference of it in the source tree. Hmm..

-- 
Regards,
Namhyung Kim


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