linux-kernel - Re: [PATCH] thermal: devfreq_cooling: inline all stubs for CONFIG_DEVFREQ

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Date:   Mon, 6 Apr 2020 13:10:07 +0200
From:   Thomas Zimmermann <tzimmermann@...e.de>
To:     Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        rui.zhang@...el.com, daniel.lezcano@...aro.org,
        amit.kucheria@...durent.com, linux-pm@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, javi.merino@...nel.org,
        edubezval@...il.com, orjan.eide@....com, stable@...r.kernel.org
Subject: Re: [PATCH] thermal: devfreq_cooling: inline all stubs for
 CONFIG_DEVFREQ_THERMAL=n



Am 03.04.20 um 22:51 schrieb Martin Blumenstingl:
> When CONFIG_DEVFREQ_THERMAL is disabled all functions except
> of_devfreq_cooling_register_power() were already inlined. Also inline
> the last function to avoid compile errors when multiple drivers call
> of_devfreq_cooling_register_power() when CONFIG_DEVFREQ_THERMAL is not
> set. Compilation failed with the following message:
>   multiple definition of `of_devfreq_cooling_register_power'
> (which then lists all usages of of_devfreq_cooling_register_power())
> 
> Thomas Zimmermann reported this problem [0] on a kernel config with
> CONFIG_DRM_LIMA={m,y}, CONFIG_DRM_PANFROST={m,y} and
> CONFIG_DEVFREQ_THERMAL=n after both, the lima and panfrost drivers
> gained devfreq cooling support.
> 
> [0] https://www.spinics.net/lists/dri-devel/msg252825.html
> 
> Fixes: a76caf55e5b356 ("thermal: Add devfreq cooling")
> Cc: stable@...r.kernel.org
> Reported-by: Thomas Zimmermann <tzimmermann@...e.de>
> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>

Tested-by: Thomas Zimmermann <tzimmermann@...e.de>

> ---
>  include/linux/devfreq_cooling.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/include/linux/devfreq_cooling.h b/include/linux/devfreq_cooling.h
> index 4635f95000a4..79a6e37a1d6f 100644
> --- a/include/linux/devfreq_cooling.h
> +++ b/include/linux/devfreq_cooling.h
> @@ -75,7 +75,7 @@ void devfreq_cooling_unregister(struct thermal_cooling_device *dfc);
>  
>  #else /* !CONFIG_DEVFREQ_THERMAL */
>  
> -struct thermal_cooling_device *
> +static inline struct thermal_cooling_device *
>  of_devfreq_cooling_register_power(struct device_node *np, struct devfreq *df,
>  				  struct devfreq_cooling_power *dfc_power)
>  {
> 

-- 
Thomas Zimmermann
Graphics Driver Developer
SUSE Software Solutions Germany GmbH
Maxfeldstr. 5, 90409 Nürnberg, Germany
(HRB 36809, AG Nürnberg)
Geschäftsführer: Felix Imendörffer



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