From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: John Stultz <johnstul@us.ibm.com>
Cc: lkml <linux-kernel@vger.kernel.org>,
Ralf Baechle <ralf@linux-mips.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mundt <lethal@linux-sh.org>,
Jim Cromie <jim.cromie@gmail.com>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [RFC][PATCH 3/3] Try to convert non-trivial clocksources to clocksource_register_hz
Date: Mon, 10 May 2010 17:53:38 +0200 [thread overview]
Message-ID: <20100510175338.05ef5db8@mschwide.boeblingen.de.ibm.com> (raw)
In-Reply-To: <1272677785-23881-3-git-send-email-johnstul@us.ibm.com>
On Fri, 30 Apr 2010 18:36:25 -0700
John Stultz <johnstul@us.ibm.com> wrote:
> NOT FOR INCLUSION!
> NOT FOR INCLUSION!
>
> I've already gone through and converted the rest of the clocksources
> to use clocksource_register_hz, and I'll be hopefully pushing those
> to arch maintainers for 2.6.36-2.6.37.
>
> However, in going through all the clocksources, I hit a few
> non-trivial conversions and wanted to bring them up on the list
> early so they can be handled soon.
>
> The following patch tries to convert the non-trival clocksources
> to use clocksource_register_hz/khz. It is likely broken. I will
> need arch maintainer help to figure out the best way to resovle
> these clocksources.
>
> This patch requires the previous "Add clocksource_register_hz/khz
> interface" patch to build.
>
> So any help maintainers can provide in finding solutions to
> break the mult/shift assumptions in the arch code would be
> greatly appreciated!
>
> thanks
> -john
>
> NOT FOR INCLUSION!
> NOT FOR INCLUSION!
The s390 conversion to clocksource_register_khz looks good - at least
the kilo hertz value is correct. Bit 2^12 of the TOD value are
microseconds, which makes one millisecond (1000<<12).
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
next prev parent reply other threads:[~2010-05-10 15:53 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-01 1:36 [PATCH 1/3] Add clocksource_register_hz/khz interface John Stultz
2010-05-01 1:36 ` [PATCH 2/3] Convert common x86 clocksources to use clocksource_register_hz/khz John Stultz
2010-05-01 1:36 ` [RFC][PATCH 3/3] Try to convert non-trivial clocksources to clocksource_register_hz John Stultz
2010-05-10 15:53 ` Martin Schwidefsky [this message]
2010-05-10 19:19 ` john stultz
2010-05-11 6:20 ` Martin Schwidefsky
2010-05-10 21:33 ` Jim Cromie
2010-05-11 0:04 ` john stultz
2010-05-11 1:51 ` Jim Cromie
2010-05-11 0:37 ` john stultz
2010-05-12 16:43 ` Julien Ridoux
2010-05-01 8:45 ` [PATCH 1/3] Add clocksource_register_hz/khz interface Thomas Gleixner
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