linux-kernel - Re: [PATCH 0/6] RFC: Typesafe callbacks

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Message-ID: <p73bq7eo5i0.fsf@crumb.suse.de>
Date:	22 Jan 2008 05:20:55 +0100
From:	Andi Kleen <andi@...stfloor.org>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Tejun Heo <htejun@...il.com>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Jeff Garzik <jeff@...zik.org>
Subject: Re: [PATCH 0/6] RFC: Typesafe callbacks

Rusty Russell <rusty@...tcorp.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
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