linux-kernel - RE: [ 05/38] ptp: update adjfreq callback description

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Message-ID: <02874ECE860811409154E81DA85FBB583AF35E1D@ORSMSX105.amr.corp.intel.com>
Date:	Mon, 26 Nov 2012 21:19:07 +0000
From:	"Keller, Jacob E" <jacob.e.keller@...el.com>
To:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Herton Ronaldo Krzesinski <herton.krzesinski@...onical.com>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"stable@...r.kernel.org" <stable@...r.kernel.org>,
	"alan@...rguk.ukuu.org.uk" <alan@...rguk.ukuu.org.uk>,
	Richard Cochran <richard.cochran@...il.com>,
	John Stultz <john.stultz@...aro.org>,
	"Kirsher, Jeffrey T" <jeffrey.t.kirsher@...el.com>,
	"David S. Miller" <davem@...emloft.net>
Subject: RE: [ 05/38] ptp: update adjfreq callback description

> -----Original Message-----
> From: Greg Kroah-Hartman [mailto:gregkh@...uxfoundation.org]
> Sent: Monday, November 26, 2012 10:46 AM
> To: Herton Ronaldo Krzesinski
> Cc: linux-kernel@...r.kernel.org; stable@...r.kernel.org;
> alan@...rguk.ukuu.org.uk; Keller, Jacob E; Richard Cochran; John Stultz;
> Kirsher, Jeffrey T; David S. Miller
> Subject: Re: [ 05/38] ptp: update adjfreq callback description
> 
> On Fri, Nov 23, 2012 at 10:26:01PM -0200, Herton Ronaldo Krzesinski wrote:
> > On Wed, Nov 21, 2012 at 04:39:48PM -0800, Greg Kroah-Hartman wrote:
> > > 3.0-stable review patch.  If anyone has any objections, please let me
> know.
> > >
> > > ------------------
> > >
> > > From: Jacob Keller <jacob.e.keller@...el.com>
> > >
> > > commit 87f4d7c1d36f44b0822053b7e5dedc31fdd0ab99 upstream.
> > >
> > > This patch updates the adjfreq callback description to include a note
> that the
> > > delta in ppb is always relative to the base frequency, and not to the
> current
> > > frequency of the hardware clock.
> > >
> > > Signed-off-by: Jacob Keller <jacob.e.keller@...el.com>
> > > CC: Richard Cochran <richard.cochran@...il.com>
> > > CC: John Stultz <john.stultz@...aro.org>
> > > Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
> > > Signed-off-by: David S. Miller <davem@...emloft.net>
> > > Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
> > >
> > > ---
> > >  include/linux/ptp_clock_kernel.h |    3 ++-
> > >  1 file changed, 2 insertions(+), 1 deletion(-)
> > >
> > > --- a/include/linux/ptp_clock_kernel.h
> > > +++ b/include/linux/ptp_clock_kernel.h
> > > @@ -50,7 +50,8 @@ struct ptp_clock_request {
> > >   * clock operations
> > >   *
> > >   * @adjfreq:  Adjusts the frequency of the hardware clock.
> > > - *            parameter delta: Desired period change in parts per
> billion.
> > > + *            parameter delta: Desired frequency offset from nominal
> frequency
> > > + *            in parts per billion
> > >   *
> > >   * @adjtime:  Shifts the time of the hardware clock.
> > >   *            parameter delta: Desired change in nanoseconds.
> >
> > This was marked for only 3.5 or later on the original changelog:
> > "CC: stable@...r.kernel.org [v3.5+]"
> 
> Ugh, my fault, now dropped from the 3.0 and 3.4-stable trees, thanks for
> finding my error.
> 
> thanks,
> 
> greg k-h

It seems to me that it should be applied back to 3.0 if PTP is there..

- Jake
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