netdev - Re: [PATCH net v3] net: ethernet: ti: fix build and remove TI_CPTS

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Date:   Tue, 12 May 2020 10:53:06 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Grygorii Strashko <grygorii.strashko@...com>
Cc:     Networking <netdev@...r.kernel.org>,
        Tony Lindgren <tony@...mide.com>,
        "David S. Miller" <davem@...emloft.net>,
        Russell King <linux@...linux.org.uk>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        Richard Cochran <richardcochran@...il.com>,
        Clay McClure <clay@...mons.net>, Dan Murphy <dmurphy@...com>,
        Murali Karicheri <m-karicheri2@...com>
Subject: Re: [PATCH net v3] net: ethernet: ti: fix build and remove
 TI_CPTS_MOD workaround

On Tue, May 12, 2020 at 10:35 AM Grygorii Strashko
<grygorii.strashko@...com> wrote:
>
> Hi Arnd,
>
> On 08/05/2020 14:25, Arnd Bergmann wrote:
> > On Fri, May 8, 2020 at 1:14 PM Grygorii Strashko
> > <grygorii.strashko@...com> wrote:
> >> On 08/05/2020 13:10, Arnd Bergmann wrote:
> >>> On Fri, May 8, 2020 at 11:59 AM Grygorii Strashko
> >
> >>>> That's because TI_CPTS_MOD (which is the symbol gating the _compilation_ of
> >>>> cpts.c) now depends on PTP_1588_CLOCK, and so is not enabled in these
> >>>> configurations, but TI_CPTS (which is the symbol gating _calls_ to the cpts
> >>>> functions) _is_ enabled. So we end up compiling calls to functions that
> >>>> don't exist, resulting in the linker errors.
> >>>>
> >>>> This patch fixes build errors and restores previous behavior by:
> >>>>    - ensure PTP_1588_CLOCK=y in TI specific configs and CPTS will be built
> >>>>    - use IS_REACHABLE(CONFIG_TI_CPTS) in code instead of IS_ENABLED()
> >>>
> >>> I don't understand what IS_REACHABLE() is needed for once all the other
> >>> changes are in place. I'd hope we can avoid that. Do you still see
> >>> failures without
> >>> that or is it just a precaution. I can do some randconfig testing on your patch
> >>> to see what else might be needed to avoid IS_REACHABLE().
> >>
> >> I've not changed this part of original patch, but seems you're right.
> >>
> >> I can drop it and resend, but, unfortunately, i do not have time today for full build testing.
> >
> > I have applied to patch locally to my randconfig tree, with the IS_REACHABLE()
> > changes taken out.
> >
>
> What will be the conclusion here?

I have seen no other problems with it, please leave out the the IS_REACHABLE()
changes and just use the dependencies.

       Arnd