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Date: Tue, 20 Jun 2017 14:10:11 +0200
From: Pavel Machek <pavel@ucw.cz>
To: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Benjamin Gaignard <benjamin.gaignard@linaro.org>,
	linaro-kernel@lists.linaro.org,
	adi-buildroot-devel@lists.sourceforge.net,
	Alessandro Zummo <a.zummo@towertech.it>,
	Gregory Clement <gregory.clement@free-electrons.com>,
	Ingo Molnar <mingo@redhat.com>, Jason Cooper <jason@lakedaemon.net>,
	John Stultz <john.stultz@linaro.org>,
	linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
	Linus Walleij <linus.walleij@linaro.org>,
	Michael Chan <michael.chan@broadcom.com>, netdev@vger.kernel.org,
	rtc-linux@googlegroups.com,
	Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
	Support Opensource <support.opensource@diasemi.com>,
	Thomas Gleixner <tglx@linutronix.de>, x86@kernel.org,
	Baruch Siach <baruch@tkos.co.il>,
	Hans Ulli Kroll <ulli.kroll@googlemail.com>,
	Vladimir Zapolskiy <vz@mleia.com>,
	Sylvain Lemieux <slemieux.tyco@gmail.com>,
	Barry Song <baohua@kernel.org>,
	Maxime Ripard <maxime.ripard@free-electrons.com>,
	Chen-Yu Tsai <wens@csie.org>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>, linux-tegra@vger.kernel.org,
	patches@opensource.wolfsonmicro.com,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Len Brown <len.brown@intel.com>, linux-pm@vger.kernel.org
Subject: [rtc-linux] Re: [PATCH 00/51] rtc: stop using rtc deprecated functions
Message-ID: <20170620121011.GA13221@amd>
References: <1497951359-13334-1-git-send-email-benjamin.gaignard@linaro.org>
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On Tue 2017-06-20 12:03:48, Alexandre Belloni wrote:
> On 20/06/2017 at 11:35:08 +0200, Benjamin Gaignard wrote:
> > rtc_time_to_tm() and rtc_tm_to_time() are deprecated because they
> > rely on 32bits variables and that will make rtc break in y2038/2016.
> 
> Please don't, because this hide the fact that the hardware will not
> handle dates in y2038 anyway and as pointed by Russell a few month ago,
> rtc_time_to_tm will be able to catch it but the 64 bit version will
> silently ignore it.

Reference? Because rtc on PCs stores date in binary coded decimal, so
it is likely to break in 2100, not 2038...
									Pavel
-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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