linux-kernel - Re: [PATCH v2 resend] pcmcia: omap_cf: Mark driver struct with _

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Message-ID: <aKCYsJnFIbAK2y8q@shine.dominikbrodowski.net>
Date: Sat, 16 Aug 2025 16:41:52 +0200
From: Dominik Brodowski <linux@...inikbrodowski.net>
To: Geert Uytterhoeven <geert+renesas@...der.be>
Cc: Aaro Koskinen <aaro.koskinen@....fi>,
	Janusz Krzysztofik <jmkrzyszt@...il.com>,
	Tony Lindgren <tony@...mide.com>,
	Kevin Hilman <khilman@...libre.com>,
	Uwe Kleine-König <ukleinek@...nel.org>,
	linux-omap@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 resend] pcmcia: omap_cf: Mark driver struct with
 __refdata to prevent section mismatch

Applied to pcmcia-next, thanks!

Best,
	Dominik


Am Wed, Aug 13, 2025 at 05:50:14PM +0200 schrieb Geert Uytterhoeven:
> As described in the added code comment, a reference to .exit.text is ok
> for drivers registered via platform_driver_probe().  Make this explicit
> to prevent the following section mismatch warning
> 
>     WARNING: modpost: drivers/pcmcia/omap_cf: section mismatch in reference: omap_cf_driver+0x4 (section: .data) -> omap_cf_remove (section: .exit.text)
> 
> that triggers on an omap1_defconfig + CONFIG_OMAP_CF=m build.
> 
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>
> Acked-by: Aaro Koskinen <aaro.koskinen@....fi>
> ---
> v2:
>   - Add Acked-by.
> ---
>  drivers/pcmcia/omap_cf.c | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/pcmcia/omap_cf.c b/drivers/pcmcia/omap_cf.c
> index 1b1dff56ec7b11f3..733777367c3b4505 100644
> --- a/drivers/pcmcia/omap_cf.c
> +++ b/drivers/pcmcia/omap_cf.c
> @@ -302,7 +302,13 @@ static void __exit omap_cf_remove(struct platform_device *pdev)
>  	kfree(cf);
>  }
>  
> -static struct platform_driver omap_cf_driver = {
> +/*
> + * omap_cf_remove() lives in .exit.text. For drivers registered via
> + * platform_driver_probe() this is ok because they cannot get unbound at
> + * runtime. So mark the driver struct with __refdata to prevent modpost
> + * triggering a section mismatch warning.
> + */
> +static struct platform_driver omap_cf_driver __refdata = {
>  	.driver = {
>  		.name	= driver_name,
>  	},
> -- 
> 2.43.0
> 
>