From mboxrd@z Thu Jan  1 00:00:00 1970
From: Namhyung Kim <namhyung@gmail.com>
Subject: Re: [RFC][PATCH] introduce ptr_diff()
Date: Fri, 20 Aug 2010 00:53:06 +0900
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To: Andi Kleen <andi@firstfloor.org>
Cc: Arnd Bergmann <arnd@arndb.de>, linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org

2010-08-19 (=EB=AA=A9), 14:23 +0200, Andi Kleen:
> IMHO it would be better to simply disable the warning in sparse inste=
ad
> of uglying the code just to work around sparse bogosity. It doesnt' s=
eem
> to make much sense. A subtraction followed by a shift is not expensiv=
e.
>=20
> -Andi
>=20

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..

--=20
Regards,
Namhyung Kim