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From: Arnd Bergmann <arnd@arndb.de>
To: "Ira W. Snyder" <iws@ovro.caltech.edu>
Cc: Richard Cochran <richardcochran@gmail.com>,
	Rodolfo Giometti <giometti@linux.it>,
	john stultz <johnstul@us.ibm.com>,
	devicetree-discuss@lists.ozlabs.org,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
	linuxppc-dev@lists.ozlabs.org,
	linux-arm-kernel@lists.infradead.org,
	Krzysztof Halasa <khc@pm.waw.pl>
Subject: Re: [PATCH 1/5] ptp: Added a brand new class driver for ptp clocks.
Date: Thu, 19 Aug 2010 17:48:51 +0200	[thread overview]
Message-ID: <201008191748.51819.arnd@arndb.de> (raw)
In-Reply-To: <20100819152301.GB25193@ovro.caltech.edu>

On Thursday 19 August 2010, Ira W. Snyder wrote:
> Perhaps you were thinking of the vhost example (taken from
> drivers/vhost/Kconfig):
> 
> config VHOST_NET
>         tristate "Host kernel accelerator for virtio net (EXPERIMENTAL)"
>         depends on NET && EVENTFD && (TUN || !TUN) && (MACVTAP || !MACVTAP) && EXPERIMENTAL
> 
> They have a similar construct with both TUN and MACVTAP there. Perhaps
> the parens are a necessary part of the "X || !X" syntax? Just a random
> guess.

Yes, that's the one I was thinking of.

My mistake was that the effect is slightly different here. VHOST and TUN are
both tristate. What we guarantee here is that if TUN is "m", VHOST cannot be "y",
because its dependency cannot be fulfilled for y.

	Arnd

  reply	other threads:[~2010-08-19 15:48 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-08-16 11:17 [PATCH v5 0/5] ptp: IEEE 1588 clock support Richard Cochran
2010-08-16 11:17 ` [PATCH 1/5] ptp: Added a brand new class driver for ptp clocks Richard Cochran
2010-08-16 14:26   ` Arnd Bergmann
2010-08-16 19:00     ` Richard Cochran
2010-08-16 19:59       ` Arnd Bergmann
2010-08-17  8:32         ` Richard Cochran
2010-08-17  9:25           ` Arnd Bergmann
2010-08-17 10:52             ` Richard Cochran
2010-08-17 11:36               ` Arnd Bergmann
2010-08-18  0:40                 ` john stultz
2010-08-18 14:04                 ` Richard Cochran
2010-08-18 15:02                   ` Arnd Bergmann
2010-08-19  9:22                     ` Richard Cochran
2010-08-19 12:29                       ` Arnd Bergmann
2010-08-19 15:23                         ` Ira W. Snyder
2010-08-19 15:48                           ` Arnd Bergmann [this message]
2010-08-16 19:24   ` john stultz
2010-08-16 19:38     ` john stultz
2010-08-17  8:53     ` Richard Cochran
2010-08-18  0:22       ` john stultz
2010-08-18  7:19         ` Richard Cochran
2010-08-19  0:12           ` john stultz
2010-08-19  5:55             ` Richard Cochran
2010-08-19 12:28               ` Arnd Bergmann
2010-08-19 15:38                 ` Richard Cochran
2010-08-23 20:21                   ` john stultz
2010-08-27 11:08                     ` Richard Cochran
2010-08-27 12:03                       ` Arnd Bergmann
2010-08-27 20:56                         ` John Stultz
2010-08-27 12:45                       ` Alan Cox
2010-08-27 20:14                       ` John Stultz
2010-08-23 20:08               ` john stultz
2010-08-24 18:30                 ` Stephan Gatzka
2010-08-25  9:40                 ` Christian Riesch
2010-08-27  1:57                   ` john stultz
2010-08-27  7:57                     ` Richard Cochran
2010-08-27 12:41                       ` Alan Cox
2010-08-27 14:02                         ` Richard Cochran
2010-08-27 14:50                           ` Alan Cox
2010-08-27 15:35                           ` M. Warner Losh
2010-08-29 13:32                         ` Christian Riesch
2010-08-27 12:38                 ` Richard Cochran
2010-08-27 13:38                   ` Alan Cox
2010-08-27 14:34                     ` Richard Cochran
2010-08-27 15:06                       ` Alan Cox
2010-08-27 15:21                         ` Patrick Loschmidt
2010-08-27 22:30                   ` John Stultz
2010-09-06  6:33                     ` Richard Cochran
2010-09-21 16:54                       ` Stephan Gatzka
2010-09-21 20:47                     ` Kyle Moffett
2010-09-22 10:14                       ` Richard Cochran
2010-08-16 11:18 ` [PATCH 2/5] ptp: Added a clock that uses the Linux system time Richard Cochran
2010-08-16 11:18 ` [PATCH 3/5] ptp: Added a clock that uses the eTSEC found on the MPC85xx Richard Cochran
2010-08-16 11:18 ` [PATCH 4/5] ptp: Added a clock driver for the IXP46x Richard Cochran
2010-08-16 11:19 ` [PATCH 5/5] ptp: Added a clock driver for the National Semiconductor PHYTER Richard Cochran

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