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From: Nicolas Pitre <nico@fluxnic.net>
To: Arnd Bergmann <arnd@kernel.org>
Cc: "Keller, Jacob E" <jacob.e.keller@intel.com>,
	Richard Cochran <richardcochran@gmail.com>,
	"Brandeburg, Jesse" <jesse.brandeburg@intel.com>,
	"Nguyen, Anthony L" <anthony.l.nguyen@intel.com>,
	"David S. Miller" <davem@davemloft.net>,
	Jakub Kicinski <kuba@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	Kurt Kanzenbach <kurt@linutronix.de>,
	"Saleem, Shiraz" <shiraz.saleem@intel.com>,
	"Ertman, David M" <david.m.ertman@intel.com>,
	"intel-wired-lan@lists.osuosl.org"
	<intel-wired-lan@lists.osuosl.org>,
	"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH net-next v2] ethernet/intel: fix PTP_1588_CLOCK dependencies
Date: Mon, 2 Aug 2021 17:22:18 -0400 (EDT)	[thread overview]
Message-ID: <7q2p5954-3062-po4-ps5r-9n30n5663ns3@syhkavp.arg> (raw)
In-Reply-To: <CAK8P3a379=Qi7g7Hmf299GgM-6g32Them81uYXPqRDZDro_azg@mail.gmail.com>

On Mon, 2 Aug 2021, Arnd Bergmann wrote:

> On Mon, Aug 2, 2021 at 10:46 PM Keller, Jacob E
> <jacob.e.keller@intel.com> wrote:
> 
> > > You can do something like it for a particular symbol though, such as
> > >
> > > config MAY_USE_PTP_1588_CLOCK
> > >        def_tristate PTP_1588_CLOCK || !PTP_1588_CLOCK
> > >
> > >  config E1000E
> > >         tristate "Intel(R) PRO/1000 PCI-Express Gigabit Ethernet support"
> > >         depends on PCI && (!SPARC32 || BROKEN)
> > > +       depends on MAY_USE_PTP_1588_CLOCK
> > >         select CRC32
> > > -       imply PTP_1588_CLOCK
> >
> > What about "integrates"?
> 
> Maybe, we'd need to look at whether that fits for the other users of the
> "A || !A" trick.

I implemented "conditional dependencies" at the time, which is syntactic 
sugar to express the above as:

	depends on A if A != n

	depends on A if A

etc.

http://lkml.iu.edu/hypermail/linux/kernel/2004.2/09783.html

But Masahiro shut it down.


Nicolas

  parent reply	other threads:[~2021-08-02 21:22 UTC|newest]

Thread overview: 23+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-02 14:59 Arnd Bergmann
2021-08-02 16:49 ` Richard Cochran
2021-08-02 19:54   ` Keller, Jacob E
2021-08-02 20:32     ` Arnd Bergmann
2021-08-02 20:46       ` Keller, Jacob E
2021-08-02 20:59         ` Arnd Bergmann
2021-08-02 21:09           ` Keller, Jacob E
2021-08-02 21:10           ` Keller, Jacob E
2021-08-02 21:22           ` Nicolas Pitre [this message]
2021-08-03 20:29       ` Arnd Bergmann
2021-08-02 23:09     ` Richard Cochran
2021-08-02 23:45       ` Keller, Jacob E
2021-08-03  0:03         ` Richard Cochran
2021-08-03  6:59       ` Arnd Bergmann
2021-08-03 15:55         ` Richard Cochran
2021-08-03 16:14           ` Richard Cochran
2021-08-03 17:00             ` Arnd Bergmann
2021-08-03 17:18               ` Keller, Jacob E
2021-08-03 18:27                 ` Arnd Bergmann
2021-08-03 23:25                   ` Keller, Jacob E
2021-08-04 11:18                   ` Arnd Bergmann
2021-08-03 20:54               ` Richard Cochran
2021-08-04 20:53                 ` Keller, Jacob E

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