linux-kernel - Re: [RFC] timers, pointers to functions and type safety

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Message-ID: <20061202215941.GN3078@ftp.linux.org.uk>
Date:	Sat, 2 Dec 2006 21:59:41 +0000
From:	Al Viro <viro@....linux.org.uk>
To:	Roman Zippel <zippel@...ux-m68k.org>
Cc:	Thomas Gleixner <tglx@...utronix.de>,
	Matthew Wilcox <matthew@....cx>,
	Linus Torvalds <torvalds@...l.org>, linux-arch@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] timers, pointers to functions and type safety

On Sat, Dec 02, 2006 at 10:43:58PM +0100, Roman Zippel wrote:

> You need some more magic macros to access/modify the data field.

Which is done bloody rarely.  grep and you'll see...  BTW, there are
other reasons why passing struct timer_list * is wrong:
	* direct calls of the timer callback
	* callback being the same for two timers embedded into
different structs
	* see a timer callback, decide it looks better as a tasklet.
What, need a different glue now?

Look, it's a delayed call.  The less glue we need, the better - the
rules are much simpler that way, so that alone means that we'll get
fewer fsckups.
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