linux-kernel - Re: [PATCH 2/9] timers: provide a "modern" variant of timers

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Message-ID: <20170518082448.GB3812@lst.de>
Date:   Thu, 18 May 2017 10:24:48 +0200
From:   Christoph Hellwig <hch@....de>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Christoph Hellwig <hch@....de>,
        Thomas Gleixner <tglx@...utronix.de>,
        Mark Gross <mark.gross@...el.com>, Tejun Heo <tj@...nel.org>,
        linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-s390 <linux-s390@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 2/9] timers: provide a "modern" variant of timers

> b) give the union a name (breaks any reference to timer_list->func in C code):
> 
>  +       union {
>  +               void            (*func)(struct timer_list *timer);
>  +               void            (*function)(unsigned long);
>  +       } u;

I'll look into that, as it seems a lot safer, and places outside
the timer code shouldn't really touch it (although I bet they do,
so more fixes for this series..)

> I fear this breaks lockdep output, which turns the name of
> the timer into a string that gets printed later. It should work
> when these are macros, or a macro wrapping an inline function
> like __init_timer is.

Ok, I'll fix it up.  Although this macro mess isn't really readable
at all.