linux-kernel - Re: [PATCH] video: ARM CLCD: export symbols for driver module

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Message-ID: <a32cc9c5-7440-2f79-b714-a60a830ab926@ti.com>
Date:   Tue, 30 Aug 2016 11:55:59 +0300
From:   Tomi Valkeinen <tomi.valkeinen@...com>
To:     Arnd Bergmann <arnd@...db.de>
CC:     Russell King <linux@...linux.org.uk>,
        Jean-Christophe Plagniol-Villard <plagnioj@...osoft.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        <linux-fbdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] video: ARM CLCD: export symbols for driver module



On 26/08/16 18:34, Arnd Bergmann wrote:
> The amba-clcd-versatile.c code is always built-in and has to
> be done that way because it gets called by platform code that is
> also built-in. However, it now also gets called from the
> core CLCD driver through the .init_panel callback function,
> which leads to a build error when the framebuffer is configured
> as a loadable module:
> 
> ERROR: "versatile_clcd_init_panel" [drivers/video/fbdev/amba-clcd-mod.ko] undefined!
> 
> The same thing happens for the nomadik driver, although that
> could be linked into the core module if we want to:
> 
> ERROR: "nomadik_clcd_init_panel" [drivers/video/fbdev/amba-clcd.ko] undefined!
> ERROR: "nomadik_clcd_init_board" [drivers/video/fbdev/amba-clcd.ko] undefined!
> 
> For consistency, I'm taking the same approach in both cases here
> and just export the functions to make them usable by the driver.
> 
> Alternatively, we could split out the CONFIG_OF-code from amba-clcd-versatile.c
> into a new file and link those two together with the core driver as one
> module.
> 
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> Fixes: 1d3f0cbe0d3a ("video: ARM CLCD: add special board and panel hooks for Nomadik")
> Fixes: 25348160e9a4 ("video: ARM CLCD: add special panel hook for Versatiles")
> ---
>  drivers/video/fbdev/amba-clcd-nomadik.c   | 2 ++
>  drivers/video/fbdev/amba-clcd-versatile.c | 2 +-
>  2 files changed, 3 insertions(+), 1 deletion(-)

Thanks, queued for 4.9.

 Tomi



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