netdev - Re: [PATCH net-next] liquidio: 'imply' ptp instead of 'select'

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Date:   Mon, 5 Dec 2016 10:44:32 -0500 (EST)
From:   Nicolas Pitre <nicolas.pitre@...aro.org>
To:     David Miller <davem@...emloft.net>
cc:     arnd@...db.de, felix.manlunas@...iumnetworks.com,
        tglx@...utronix.de, david.daney@...ium.com,
        satananda.burla@...iumnetworks.com, rvatsavayi@...iumnetworks.com,
        sgoutham@...ium.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] liquidio: 'imply' ptp instead of 'select'

On Sat, 3 Dec 2016, David Miller wrote:

> From: Arnd Bergmann <arnd@...db.de>
> Date: Sat,  3 Dec 2016 00:04:32 +0100
> 
> > ptp now depends on the optional POSIX_TIMERS setting and fails to build
> > if we select it without that:
> > 
> > warning: (LIQUIDIO_VF && TI_CPTS) selects PTP_1588_CLOCK which has unmet direct dependencies (NET && POSIX_TIMERS)
> > warning: (LIQUIDIO_VF && TI_CPTS) selects PTP_1588_CLOCK which has unmet direct dependencies (NET && POSIX_TIMERS)
> > ERROR: "posix_clock_unregister" [drivers/ptp/ptp.ko] undefined!
> > ERROR: "posix_clock_register" [drivers/ptp/ptp.ko] undefined!
> > ERROR: "pps_unregister_source" [drivers/ptp/ptp.ko] undefined!
> > ERROR: "pps_event" [drivers/ptp/ptp.ko] undefined!
> > ERROR: "pps_register_source" [drivers/ptp/ptp.ko] undefined!
> > 
> > It seems that two patches have collided here, the build failure
> > is a result of the combination. Changing the new option to 'imply'
> > as well fixes it.
> > 
> > Fixes: 111fc64a237f ("liquidio CN23XX: VF registration")
> > Fixes: d1cbfd771ce8 ("ptp_clock: Allow for it to be optional")
> > Signed-off-by: Arnd Bergmann <arnd@...db.de>
> 
> Like the kbuild robot, when I apply this it complains about 'imply' being
> an unknown option.
> 
> I guess it worked for you because support for 'imply' exists in the -next
> tree and gets pulled in from somewhere else.

Exact.

> In any event, as-is I cannot apply this.

It should be carried in linux-next for the time being, and suggested as 
a probable "merge resolution" to Linus when submitting your tree for 
merging.  I think that's the best that can be done.


Nicolas