linux-kernel - Re: [patch 2.6.19-rc6 6/6] rtc-omap driver

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Message-Id: <20061121182828.4fc32802.akpm@osdl.org>
Date:	Tue, 21 Nov 2006 18:28:28 -0800
From:	Andrew Morton <akpm@...l.org>
To:	David Brownell <david-b@...bell.net>
Cc:	Alessandro Zummo <alessandro.zummo@...ertech.it>,
	Linux Kernel list <linux-kernel@...r.kernel.org>,
	Tony Lindgren <tony@...mide.com>
Subject: Re: [patch 2.6.19-rc6 6/6] rtc-omap driver

On Tue, 21 Nov 2006 18:15:42 -0800
David Brownell <david-b@...bell.net> wrote:

> On Tuesday 21 November 2006 5:19 pm, Andrew Morton wrote:
> > On Mon, 20 Nov 2006 10:28:48 -0800
> 
> > > +		/* sometimes the alarm wraps into tomorrow */
> > > +		if (then < now) {
> > 
> > This isn't wraparound-safe.  If you have then=0xffffffff and now=0x00000001.
> > 
> > Perhaps that can't happen.
> 
> Starting in 2037 or whenever, various things will be breaking...
> 
> Probably the RTC lib routines should use a time_t, and when that gets
> changed to 64 bits then things like this will be fixed automagically.
> Right now they use "unsigned long".
> 
> I suggest Alessandro handle those issues.
> 

We could simply (ab)use timer_after() here.

> 
> > > +MODULE_AUTHOR("George G. Davis (and others)");
> > 
> > Maybe some additional signoffs would be appropirate?
> 
> I pinged the MontaVista emails from the original driver; maybe
> they'll send signoffs.
> 

OK.  Such signoffs are certainly not a DCO _requirement_.  If the MV guys
are asleep, no big deal - we trust david-b's assertion.


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