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To: Rusty Russell <rusty@rustcorp.com.au>
Cc: Tejun Heo <htejun@gmail.com>,
       Linus Torvalds <torvalds@linux-foundation.org>,
       Andrew Morton <akpm@linux-foundation.org>, linux-kernel@vger.kernel.org,
       Jeff Garzik <jeff@garzik.org>
Subject: Re: [PATCH 0/6] RFC: Typesafe callbacks
References: <200801202046.14746.rusty@rustcorp.com.au>
	<200801212233.04989.rusty@rustcorp.com.au>
	<47949257.1000102@gmail.com>
	<200801221027.15002.rusty@rustcorp.com.au>
From: Andi Kleen <andi@firstfloor.org>
Date: 22 Jan 2008 05:20:55 +0100
In-Reply-To: <200801221027.15002.rusty@rustcorp.com.au>
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Rusty Russell <rusty@rustcorp.com.au> writes:
> ===
> Attempt to create callbacks which take unsigned long as well as
> correct pointer types.

FWIW i had something similar using the gcc union extension at some
point for ioctls because I was tired for all the ugly casts from
unsigned long arg to void * in ioctl handlers.

But I decided to not push it because sparse would have likely choked 
on it, and sparse actually finds a lot of bugs so it's more important than
having a few more casts.

-Andi