linux-kernel - Re: [PATCH 1/2] drm/bridge: imx: fix mixed module-builtin object

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Date:   Sun, 4 Jun 2023 17:37:44 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Andrzej Hajda <andrzej.hajda@...el.com>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        Robert Foss <rfoss@...nel.org>,
        Jonas Karlman <jonas@...boo.se>,
        Jernej Skrabec <jernej.skrabec@...il.com>,
        linux-kernel@...r.kernel.org, Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...il.com>,
        Fabio Estevam <festevam@...il.com>,
        Liu Ying <victor.liu@....com>,
        NXP Linux Team <linux-imx@....com>,
        Nick Terrell <terrelln@...com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Shawn Guo <shawnguo@...nel.org>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 1/2] drm/bridge: imx: fix mixed module-builtin object

On Sun, Jun 4, 2023 at 1:52 PM Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
>
> Hi Yamada-san,
>
> Thank you for the patch.
>
> On Sun, Jun 04, 2023 at 02:07:46AM +0900, Masahiro Yamada wrote:
> > With CONFIG_DRM_IMX8QM_LDB=m and CONFIG_DRM_IMX8QXP_LDB=y (or vice
> > versa), imx-ldb-helper.o is linked to a module and also to vmlinux
> > even though the expected CFLAGS are different between builtins and
> > modules.
> >
> > This is the same situation as fixed by commit 637a642f5ca5 ("zstd:
> > Fixing mixed module-builtin objects").
> >
> > Turn helpers in imx-ldb-helper.c into inline functions.
>
> Wouldn't it be better to turn it into a module ? It could then be
> built-in for the above configuration, are compiled as a module when all
> its users are module as well.


Yes, two ways to fix it.
inline line functions vs a separate module

I do not have a strong opinion.


I sent v2.
https://lore.kernel.org/lkml/20230604075713.1027261-1-masahiroy@kernel.org/T/#t

Please pick a preferred one.








--
Best Regards

Masahiro Yamada