From: Russell King - ARM Linux <linux-I+IVW8TIWO2tmTQ+vhA3Yw@public.gmane.org>
To: Alexandre Belloni
<alexandre.belloni-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
Cc: Pavel Machek <pavel-+ZI9xUNit7I@public.gmane.org>,
Thomas Gleixner <tglx-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org>,
Benjamin Gaignard
<benjamin.gaignard-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
Baruch Siach <baruch-NswTu9S1W3P6gbPvEgmw2w@public.gmane.org>,
"patches-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org"
<patches-yzvPICuk2AATkU/dhu1WVueM+bqZidxxQQ4Iyu8u01E@public.gmane.org>,
Linus Walleij
<linus.walleij-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>,
"linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org"
<linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org>,
Thierry Reding
<thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
"x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org"
<x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>,
Jonathan Hunter
<jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>,
Ingo Molnar <mingo-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>,
Sylvain Lemieux
<slemieux.tyco-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Sebastian Hesselbarth
<sebastian.hesselbarth-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>,
Len Brown <len.brown-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
"linaro-kernel-cunTk1MwBs8s++Sfvej+rw@public.gmane.org"
<linaro-kernel-cunTk1MwBs8s++Sfvej+rw@public.gmane.org>,
Jason Cooper <jason-NLaQJdtUoK4Be96aLqz0jA@public.gmane.org>,
rtc-linux@googlegr
Subject: Re: [PATCH 00/51] rtc: stop using rtc deprecated functions
Date: Wed, 21 Jun 2017 10:19:49 +0100 [thread overview]
Message-ID: <20170621091948.GP4902@n2100.armlinux.org.uk> (raw)
In-Reply-To: <20170621083907.y3gadsmsoufa5niv-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org>
On Wed, Jun 21, 2017 at 10:39:07AM +0200, Alexandre Belloni wrote:
> On 21/06/2017 at 09:51:52 +0200, Pavel Machek wrote:
> > If someone uses different threshold, well, there will be
> > confusion. But only for users that have their rtc set to the past,
> > which is quite unusual.
> >
>
> Or not, having an RTC set in the past is actually quite common. I'd find
> it weird to have a new device boot and be set to a date in the future.
... and that basically means you can't use hardware that stores RTC
time as a 32-bit number of seconds past 2106.
> Also note that the threshold or offset thing may seem like a good idea
> but fails with many RTCs because of how they handle leap years.
Not for the case being discussed. A 32-bit counter of seconds knows
nothing about leap years - all that is handled by the conversion
functions.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux <linux@armlinux.org.uk>
To: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Pavel Machek <pavel@ucw.cz>, Thomas Gleixner <tglx@linutronix.de>,
Benjamin Gaignard <benjamin.gaignard@linaro.org>,
Baruch Siach <baruch@tkos.co.il>,
"patches@opensource.wolfsonmicro.com"
<patches@opensource.wolfsonmicro.com>,
Linus Walleij <linus.walleij@linaro.org>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
"x86@kernel.org" <x86@kernel.org>,
Jonathan Hunter <jonathanh@nvidia.com>,
Chen-Yu Tsai <wens@csie.org>, Ingo Molnar <mingo@redhat.com>,
Sylvain Lemieux <slemieux.tyco@gmail.com>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Len Brown <len.brown@intel.com>,
"linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>,
Jason Cooper <jason@lakedaemon.net>,
"rtc-linux@googlegroups.com" <rtc-linux@googlegroups.com>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
Hans Ulli Kroll <ulli.kroll@googlemail.com>,
"adi-buildroot-devel@lists.sourceforge.net"
<adi-buildroot-devel@lists.sourceforge.net>,
Vladimir Zapolskiy <vz@mleia.com>,
John Stultz <john.stultz@linaro.org>,
Gregory Clement <gregory.clement@free-electrons.com>,
Michael Chan <michael.chan@broadcom.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Alessandro Zummo <a.zummo@towertech.it>,
Barry Song <baohua@kernel.org>,
Support Opensource <Support.Opensource@diasemi.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Steve Twiss <stwiss.opensource@diasemi.com>,
Maxime Ripard <maxime.ripard@free-electrons.com>
Subject: Re: [PATCH 00/51] rtc: stop using rtc deprecated functions
Date: Wed, 21 Jun 2017 10:19:49 +0100 [thread overview]
Message-ID: <20170621091948.GP4902@n2100.armlinux.org.uk> (raw)
In-Reply-To: <20170621083907.y3gadsmsoufa5niv@piout.net>
On Wed, Jun 21, 2017 at 10:39:07AM +0200, Alexandre Belloni wrote:
> On 21/06/2017 at 09:51:52 +0200, Pavel Machek wrote:
> > If someone uses different threshold, well, there will be
> > confusion. But only for users that have their rtc set to the past,
> > which is quite unusual.
> >
>
> Or not, having an RTC set in the past is actually quite common. I'd find
> it weird to have a new device boot and be set to a date in the future.
... and that basically means you can't use hardware that stores RTC
time as a 32-bit number of seconds past 2106.
> Also note that the threshold or offset thing may seem like a good idea
> but fails with many RTCs because of how they handle leap years.
Not for the case being discussed. A 32-bit counter of seconds knows
nothing about leap years - all that is handled by the conversion
functions.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
WARNING: multiple messages have this Message-ID (diff)
From: Russell King - ARM Linux <linux@armlinux.org.uk>
To: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Cc: Pavel Machek <pavel@ucw.cz>, Thomas Gleixner <tglx@linutronix.de>,
Benjamin Gaignard <benjamin.gaignard@linaro.org>,
Baruch Siach <baruch@tkos.co.il>,
"patches@opensource.wolfsonmicro.com"
<patches@opensource.wolfsonmicro.com>,
Linus Walleij <linus.walleij@linaro.org>,
"linux-tegra@vger.kernel.org" <linux-tegra@vger.kernel.org>,
Thierry Reding <thierry.reding@gmail.com>,
"x86@kernel.org" <x86@kernel.org>,
Jonathan Hunter <jonathanh@nvidia.com>,
Chen-Yu Tsai <wens@csie.org>, Ingo Molnar <mingo@redhat.com>,
Sylvain Lemieux <slemieux.tyco@gmail.com>,
Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>,
Len Brown <len.brown@intel.com>,
"linaro-kernel@lists.linaro.org" <linaro-kernel@lists.linaro.org>,
Jason Cooper <jason@lakedaemon.net>,
"rtc-linux@googlegroups.com" <rtc-linux@googlegroups.com>,
"linux-pm@vger.kernel.org" <linux-pm@vger.kernel.org>,
Hans Ulli Kroll <ulli.kroll@googlemail.com>,
"adi-buildroot-devel@lists.sourceforge.net"
<adi-buildroot-devel@lists.sourceforge.net>,
Vladimir Zapolskiy <vz@mleia.com>,
John Stultz <john.stultz@linaro.org>,
Gregory Clement <gregory.clement@free-electrons.com>,
Michael Chan <michael.chan@broadcom.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Alessandro Zummo <a.zummo@towertech.it>,
Barry Song <baohua@kernel.org>,
Support Opensource <Support.Opensource@diasemi.com>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Steve Twiss <stwiss.opensource@diasemi.com>,
Maxime Ripard <maxime.ripard@free-electrons.com>
Subject: [rtc-linux] Re: [PATCH 00/51] rtc: stop using rtc deprecated functions
Date: Wed, 21 Jun 2017 10:19:49 +0100 [thread overview]
Message-ID: <20170621091948.GP4902@n2100.armlinux.org.uk> (raw)
In-Reply-To: <20170621083907.y3gadsmsoufa5niv@piout.net>
On Wed, Jun 21, 2017 at 10:39:07AM +0200, Alexandre Belloni wrote:
> On 21/06/2017 at 09:51:52 +0200, Pavel Machek wrote:
> > If someone uses different threshold, well, there will be
> > confusion. But only for users that have their rtc set to the past,
> > which is quite unusual.
> >
>
> Or not, having an RTC set in the past is actually quite common. I'd find
> it weird to have a new device boot and be set to a date in the future.
... and that basically means you can't use hardware that stores RTC
time as a 32-bit number of seconds past 2106.
> Also note that the threshold or offset thing may seem like a good idea
> but fails with many RTCs because of how they handle leap years.
Not for the case being discussed. A 32-bit counter of seconds knows
nothing about leap years - all that is handled by the conversion
functions.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
--
You received this message because you are subscribed to "rtc-linux".
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WARNING: multiple messages have this Message-ID (diff)
From: linux@armlinux.org.uk (Russell King - ARM Linux)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 00/51] rtc: stop using rtc deprecated functions
Date: Wed, 21 Jun 2017 10:19:49 +0100 [thread overview]
Message-ID: <20170621091948.GP4902@n2100.armlinux.org.uk> (raw)
In-Reply-To: <20170621083907.y3gadsmsoufa5niv@piout.net>
On Wed, Jun 21, 2017 at 10:39:07AM +0200, Alexandre Belloni wrote:
> On 21/06/2017 at 09:51:52 +0200, Pavel Machek wrote:
> > If someone uses different threshold, well, there will be
> > confusion. But only for users that have their rtc set to the past,
> > which is quite unusual.
> >
>
> Or not, having an RTC set in the past is actually quite common. I'd find
> it weird to have a new device boot and be set to a date in the future.
... and that basically means you can't use hardware that stores RTC
time as a 32-bit number of seconds past 2106.
> Also note that the threshold or offset thing may seem like a good idea
> but fails with many RTCs because of how they handle leap years.
Not for the case being discussed. A 32-bit counter of seconds knows
nothing about leap years - all that is handled by the conversion
functions.
--
RMK's Patch system: http://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line: currently at 9.6Mbps down 400kbps up
according to speedtest.net.
next prev parent reply other threads:[~2017-06-21 9:19 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-20 21:35 [PATCH 00/51] rtc: stop using rtc deprecated functions Alexandre Belloni
2017-06-20 21:35 ` Alexandre Belloni
2017-06-20 21:35 ` [rtc-linux] " Alexandre Belloni
2017-06-20 21:35 ` Alexandre Belloni
[not found] ` <20170620213507.urobmtg34vzubrdq-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org>
2017-06-20 22:00 ` Thomas Gleixner
2017-06-20 22:00 ` Thomas Gleixner
2017-06-20 22:00 ` Thomas Gleixner
2017-06-20 22:00 ` [rtc-linux] " Thomas Gleixner
2017-06-20 22:00 ` Thomas Gleixner
2017-06-20 22:38 ` Russell King - ARM Linux
2017-06-20 22:38 ` Russell King - ARM Linux
2017-06-20 22:38 ` Russell King - ARM Linux
2017-06-20 22:38 ` [rtc-linux] " Russell King - ARM Linux
2017-06-20 22:38 ` Russell King - ARM Linux
2017-06-21 7:51 ` Pavel Machek
2017-06-21 7:51 ` Pavel Machek
2017-06-21 7:51 ` Pavel Machek
2017-06-21 7:51 ` [rtc-linux] " Pavel Machek
2017-06-21 7:51 ` Pavel Machek
2017-06-21 8:39 ` Alexandre Belloni
2017-06-21 8:39 ` Alexandre Belloni
2017-06-21 8:39 ` Alexandre Belloni
2017-06-21 8:39 ` [rtc-linux] " Alexandre Belloni
2017-06-21 8:39 ` Alexandre Belloni
[not found] ` <20170621083907.y3gadsmsoufa5niv-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org>
2017-06-21 6:34 ` Pavel Machek
2017-06-21 6:34 ` Pavel Machek
2017-06-21 6:34 ` Pavel Machek
2017-06-21 6:34 ` [rtc-linux] " Pavel Machek
2017-06-21 6:34 ` Pavel Machek
2017-06-21 12:35 ` Alexandre Belloni
2017-06-21 12:35 ` Alexandre Belloni
2017-06-21 12:35 ` Alexandre Belloni
2017-06-21 12:35 ` [rtc-linux] " Alexandre Belloni
2017-06-21 12:35 ` Alexandre Belloni
[not found] ` <20170621123535.b5fvwlydfhnhuqll-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org>
2017-06-21 18:08 ` Pavel Machek
2017-06-21 18:08 ` Pavel Machek
2017-06-21 18:08 ` Pavel Machek
2017-06-21 18:08 ` [rtc-linux] " Pavel Machek
2017-06-21 18:08 ` Pavel Machek
2017-06-21 9:19 ` Russell King - ARM Linux [this message]
2017-06-21 9:19 ` Russell King - ARM Linux
2017-06-21 9:19 ` [rtc-linux] " Russell King - ARM Linux
2017-06-21 9:19 ` Russell King - ARM Linux
[not found] ` <20170621091948.GP4902-l+eeeJia6m9URfEZ8mYm6t73F7V6hmMc@public.gmane.org>
2017-06-21 9:41 ` Alexandre Belloni
2017-06-21 9:41 ` Alexandre Belloni
2017-06-21 9:41 ` Alexandre Belloni
2017-06-21 9:41 ` [rtc-linux] " Alexandre Belloni
2017-06-21 9:41 ` Alexandre Belloni
-- strict thread matches above, loose matches on Subject: below --
2017-06-20 9:35 Benjamin Gaignard
2017-06-20 9:35 ` Benjamin Gaignard
2017-06-20 9:35 ` Benjamin Gaignard
2017-06-20 9:35 ` Benjamin Gaignard
[not found] ` <1497951359-13334-1-git-send-email-benjamin.gaignard-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
2017-06-20 10:03 ` Alexandre Belloni
2017-06-20 10:03 ` Alexandre Belloni
2017-06-20 10:03 ` Alexandre Belloni
2017-06-20 10:03 ` Alexandre Belloni
[not found] ` <20170620100348.zh4ygvjjgnhxvmvl-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org>
2017-06-20 10:07 ` Alexandre Belloni
2017-06-20 10:07 ` Alexandre Belloni
2017-06-20 10:07 ` Alexandre Belloni
2017-06-20 10:07 ` Alexandre Belloni
2017-06-20 12:10 ` Pavel Machek
2017-06-20 12:10 ` Pavel Machek
2017-06-20 12:10 ` Pavel Machek
2017-06-20 12:10 ` Pavel Machek
2017-06-20 12:24 ` Alexandre Belloni
2017-06-20 12:24 ` Alexandre Belloni
2017-06-20 12:24 ` Alexandre Belloni
2017-06-20 12:24 ` Alexandre Belloni
[not found] ` <20170620122400.sm7qqvwyj6cuzarw-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org>
2017-06-20 13:26 ` Pavel Machek
2017-06-20 13:26 ` Pavel Machek
2017-06-20 13:26 ` Pavel Machek
2017-06-20 13:26 ` Pavel Machek
2017-06-20 13:37 ` Steve Twiss
2017-06-20 13:37 ` Steve Twiss
2017-06-20 13:37 ` Steve Twiss
2017-06-20 13:37 ` Steve Twiss
[not found] ` <6ED8E3B22081A4459DAC7699F3695FB7018CD96FCD-68WUHU125fLzLL1Oxlh9IgLouzNaz+3S@public.gmane.org>
2017-06-20 13:44 ` Pavel Machek
2017-06-20 13:44 ` Pavel Machek
2017-06-20 13:44 ` Pavel Machek
2017-06-20 13:44 ` Pavel Machek
2017-06-20 13:48 ` Alexandre Belloni
2017-06-20 13:48 ` Alexandre Belloni
2017-06-20 13:48 ` Alexandre Belloni
2017-06-20 13:48 ` Alexandre Belloni
[not found] ` <20170620134827.ubvzhh25klaotupv-m++hUPXGwpdeoWH0uzbU5w@public.gmane.org>
2017-06-20 15:07 ` Benjamin Gaignard
2017-06-20 15:07 ` Benjamin Gaignard
2017-06-20 15:07 ` Benjamin Gaignard
2017-06-20 15:07 ` Benjamin Gaignard
[not found] ` <CA+M3ks68+z6nDtYM8CDpso7SxjB6Nt5E=rOc1yxx=kDz6PUeVQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-06-20 21:15 ` Russell King - ARM Linux
2017-06-20 21:15 ` Russell King - ARM Linux
2017-06-20 21:15 ` Russell King - ARM Linux
2017-06-20 21:15 ` Russell King - ARM Linux
[not found] ` <20170620211536.GM4902-l+eeeJia6m9URfEZ8mYm6t73F7V6hmMc@public.gmane.org>
2017-06-21 9:26 ` David Laight
2017-06-21 9:26 ` David Laight
2017-06-21 9:26 ` David Laight
2017-06-21 9:26 ` David Laight
[not found] ` <063D6719AE5E284EB5DD2968C1650D6DD00278C0-VkEWCZq2GCInGFn1LkZF6NBPR1lH4CV8@public.gmane.org>
2017-06-21 9:35 ` Russell King - ARM Linux
2017-06-21 9:35 ` Russell King - ARM Linux
2017-06-21 9:35 ` Russell King - ARM Linux
2017-06-20 22:08 ` Pavel Machek
2017-06-20 22:08 ` Pavel Machek
2017-06-20 22:08 ` Pavel Machek
2017-06-20 22:08 ` Pavel Machek
2017-06-21 9:14 ` Benjamin Gaignard
2017-06-21 9:14 ` Benjamin Gaignard
2017-06-21 9:14 ` Benjamin Gaignard
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