linux-kernel - Re: Converting struct timer_list callback argument to struct timer

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Message-ID: <20170901104456.GA25892@infradead.org>
Date:   Fri, 1 Sep 2017 03:44:56 -0700
From:   Christoph Hellwig <hch@...radead.org>
To:     Thomas Gleixner <tglx@...utronix.de>
Cc:     Christoph Hellwig <hch@...radead.org>,
        Kees Cook <keescook@...omium.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: Converting struct timer_list callback argument to struct
 timer_list *

On Fri, Sep 01, 2017 at 12:21:46PM +0200, Thomas Gleixner wrote:
> On Fri, 1 Sep 2017, Christoph Hellwig wrote:
> 
> > Good work!
> > 
> > I just think that the TIMER_CONTAINER name is revolting.
> > 
> > The usual name for such a helper fitting other uses like lists
> > and rbtrees would be timer_entry, and that also reads much better.
> 
> I think the plan is to remove that thing afterward, because then the
> callback function is:
> 
> 	 void func(struct timer_list *timer)
> 
> So I don't mind the ugly name as it should be simply removed once the tree
> is converted over.

Well, we can't just remove it, we could just replace it with
container_of().  lists and rbtrees just keep their list_entry and
rb_entry wrappers for timer_of, so we could save us the additional
churn by naming it timer_entry and just keeping it.