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From: dick@softplc.com (Dick Hollenbeck)
To: linux-arm-kernel@lists.infradead.org
Subject: ks8695_gettimeoffset
Date: Mon, 20 Dec 2010 13:37:51 -0600	[thread overview]
Message-ID: <4D0FB08F.9060007@softplc.com> (raw)
In-Reply-To: <20101220193049.GI28157@n2100.arm.linux.org.uk>

On 12/20/2010 01:30 PM, Russell King - ARM Linux wrote:
> On Mon, Dec 20, 2010 at 01:09:47PM -0600, Dick Hollenbeck wrote:
>> >From userspace, printing the return values from a rapid looping
>> sequence of calls to
>>
>>    clock_gettime( CLOCK_MONOTONIC, &now );
>>
>> leads me to believe that kernel function ks8695_gettimeoffset() is
>> not worth anything.
> That'll be because clock_gettime(CLOCK_MONOTONIC) doesn't use the old
> gettimeoffset() method to correct the returned time - none of the POSIX
> timers use the old gettimeoffset() stuff, only gettimeofday() does.
>
> Platforms really should be using the clocksource/clockevents code
> where ever possible, rather than selecting ARCH_USES_GETTIMEOFFSET.
>
> Does someone with a KS8695-based platform want to have a go at
> converting it over to clocksource/clockevents?

Thanks Russell. 

    As a quick aside, I posted the same question twice because web archive does not show the email
content getting through:

    http://lists.infradead.org/pipermail/linux-arm-kernel/2010-December/035978.html

If no one with more experience in this area steps up, I can do some work on this, but I would need
considerable hand holding since I have not been following the names of these major subsystems within
the kernel as of late. 

Let's wait, and then I may have to raise the issue again if no one steps up.

Dick

  reply	other threads:[~2010-12-20 19:37 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-12-20 19:09 ks8695_gettimeoffset Dick Hollenbeck
2010-12-20 19:30 ` ks8695_gettimeoffset Russell King - ARM Linux
2010-12-20 19:37   ` Dick Hollenbeck [this message]
2010-12-27 15:37   ` ks8695_gettimeoffset Yegor Yefremov
2011-01-03  0:28     ` ks8695_gettimeoffset Russell King - ARM Linux
2011-01-03 19:55     ` ks8695_gettimeoffset avictor.za at gmail.com
2011-01-04  6:26       ` ks8695_gettimeoffset Dick Hollenbeck
2011-01-04  6:32         ` ks8695_gettimeoffset Dick Hollenbeck
  -- strict thread matches above, loose matches on Subject: below --
2010-12-20 19:32 ks8695_gettimeoffset Dick Hollenbeck

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