linux-kernel - Re: [RESEND PATCH] timerfd: Allow TFD_TIMER_CANCEL_ON

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Message-ID: <27613722.NGRuyuj3GB@wuerfel>
Date:	Tue, 20 Oct 2015 10:18:22 +0200
From:	Arnd Bergmann <arnd@...db.de>
To:	John Stultz <john.stultz@...aro.org>
Cc:	Jesper Nilsson <jesper.nilsson@...s.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Alexander Viro <viro@...iv.linux.org.uk>,
	lkml <linux-kernel@...r.kernel.org>,
	"linux-fsdevel@...r.kernel.org" <linux-fsdevel@...r.kernel.org>,
	Michael Kerrisk <mtk@...7.org>,
	Miroslav Lichvar <mlichvar@...hat.com>,
	Arnd Bergmann <arnd.bergmann@...aro.org>
Subject: Re: [RESEND PATCH] timerfd: Allow TFD_TIMER_CANCEL_ON_SET with relative timeouts

On Monday 19 October 2015 11:53:25 John Stultz wrote:
> 
> But yea. At the same time I get you want to avoid user-pain like in
> the case of the badly initialized RTC, but in that case would
> returning 0 for RTC reads greater then y2038 on 32 bit systems be a
> more sane fix?

I like that idea. In theory we could go further and check that the RTC
is somewhere between 2015 and 2037 (or higher on 64-bit systems) but
return 0 (1970) for anything that is outside of that range. That might
have side-effects for users that have a legitimate reason to backdate
their clocks though.

	Arnd
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