linux-kernel - Re: [patch 28/28] posix clocks: Introduce dynamic clocks

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Date:	Tue, 1 Feb 2011 23:04:47 +0100 (CET)
From:	Thomas Gleixner <tglx@...utronix.de>
To:	john stultz <johnstul@...ibm.com>
cc:	LKML <linux-kernel@...r.kernel.org>,
	Richard Cochran <richard.cochran@...cron.at>,
	Ingo Molnar <mingo@...e.hu>,
	Peter Zijlstra <peterz@...radead.org>
Subject: Re: [patch 28/28] posix clocks: Introduce dynamic clocks

On Tue, 1 Feb 2011, john stultz wrote:

> On Tue, 2011-02-01 at 13:52 +0000, Thomas Gleixner wrote:
> > plain text document attachment
> > (posix-clocks-introduce-dynamic-clocks.patch)
> > From: Richard Cochran <richardcochran@...il.com>
> > 
> > This patch adds support for adding and removing posix clocks. The
> > clock lifetime cycle is patterned after usb devices. Each clock is
> > represented by a standard character device. In addition, the driver
> > may optionally implement custom character device operations.
> > 
> > The posix clock and timer system calls listed below now work with
> > dynamic posix clocks, as well as the traditional static clocks.
> > The following system calls are affected:
> > 
> >    - clock_adjtime (brand new syscall)
> >    - clock_gettime
> >    - clock_getres
> >    - clock_settime
> >    - timer_create
> >    - timer_delete
> >    - timer_gettime
> >    - timer_settime
> > 
> > [ tglx: Adapted to the posix-timer cleanup. Moved clock_posix_dynamic
> >   	to posix-clock.c and made all referenced functions static ]
> 
> I sort of worry about the naming collision with the term posix-clock, as
> this is just one type of posix clock (I suspect most folks think of a
> posix clock as the clockid passed to the existing posix api).

Well that's kernel internal and not the posix-timer syscalls.
 
> Could we maybe use posix-dynclock or posix-fdclock or something? I know
> its already been changed from clkdev, so sorry for being finicky here
> and not catching this earlier.

I'm fine with the name as is and it's well documented.

Thanks,

	tglx
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