linux-kernel - Re: [PATCH 13/22] input: omap: void using mach/*.h headers

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Date:   Fri, 9 Aug 2019 01:39:41 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Arnd Bergmann <arnd@...db.de>,
        Aaro Koskinen <aaro.koskinen@....fi>,
        Tony Lindgren <tony@...mide.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Linus Walleij <linus.walleij@...aro.org>,
        Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        "open list:HID CORE LAYER" <linux-input@...r.kernel.org>,
        linux-omap <linux-omap@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 13/22] input: omap: void using mach/*.h headers

Hi,

On Thu, Aug 08, 2019 at 03:19:50PM -0700, Dmitry Torokhov wrote:
> On Thu, Aug 08, 2019 at 11:46:45PM +0200, Arnd Bergmann wrote:
> > On Thu, Aug 8, 2019 at 11:43 PM Dmitry Torokhov wrote:
> > > On Thu, Aug 08, 2019 at 11:22:22PM +0200, Arnd Bergmann wrote:
> > > > By using the new linux/soc/ti/omap1-io.h header instead,
> > > > compile-testing can be enabled, and a CONFIG_ARCH_MULTIPLATFORM
> > > > conversion of omap1 may eventually be possible.
> > > >
> > > > The warning in the header file gets removed in order to
> > > > allow CONFIG_COMPILE_TEST.
> > >
> > > Given that we want to migrate people off this driver everywhere but
> > > OMAP1 I wonder why we would want to improve compile coverage of it.
> > 
> > Mainly for consistency: I'm converting all omap1 drivers in this series to
> > not rely on mach/* headers and to let them be compiled standalone.
> > The other drivers don't have a replacement, so I could treat this different
> > from the rest and skip the Kconfig and platform_data changes if you
> > prefer.
> 
> Yes, because at least with the version you posted we are losing the
> #warning telling people to move to matrix_keypad. We could do:
> 
> #ifndef CONFIG_COMPILE_TEST
> #warning ...
> #endif
> 
> if you really want to allow compiling standalone for testing.

FWIW the driver depends on ARCH_OMAP1 and the warning is
only printed for !ARCH_OMAP1. In other words: The warning
is never printed at the moment. All OMAP2+ boards moved to
matrix-keypad long time ago and the driver does not support
OMAP2+ anymore since f799a3d8fe170 from 2012.

-- Sebastian

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