linux-kernel - Re: [PATCH v4 1/3] interconnect: Export of_icc_get_from

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Message-ID: <45e28d51-27db-2faa-d633-3a3d857ecdc9@linaro.org>
Date:   Thu, 23 Jan 2020 11:21:13 +0200
From:   Georgi Djakov <georgi.djakov@...aro.org>
To:     Artur Świgoń <a.swigon@...sung.com>,
        linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-samsung-soc@...r.kernel.org
Cc:     cw00.choi@...sung.com, b.zolnierkie@...sung.com,
        m.szyprowski@...sung.com, krzk@...nel.org
Subject: Re: [PATCH v4 1/3] interconnect: Export of_icc_get_from_provider()

Hi Artur,

On 1/16/20 16:42, Artur Świgoń wrote:
> This patch makes the above function public (for use in exynos-bus devfreq
> driver).
> 
> Signed-off-by: Artur Świgoń <a.swigon@...sung.com>
> Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
> Reviewed-by: Chanwoo Choi <cw00.choi@...sung.com>
> ---
>  drivers/interconnect/core.c           | 3 ++-
>  include/linux/interconnect-provider.h | 6 ++++++
>  2 files changed, 8 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
> index f277e467156f..0be1764d3528 100644
> --- a/drivers/interconnect/core.c
> +++ b/drivers/interconnect/core.c
> @@ -330,7 +330,7 @@ EXPORT_SYMBOL_GPL(of_icc_xlate_onecell);
>   * Returns a valid pointer to struct icc_node on success or ERR_PTR()
>   * on failure.
>   */
> -static struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
> +struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
>  {
>  	struct icc_node *node = ERR_PTR(-EPROBE_DEFER);
>  	struct icc_provider *provider;
> @@ -349,6 +349,7 @@ static struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
>  
>  	return node;
>  }
> +EXPORT_SYMBOL_GPL(of_icc_get_from_provider);
>  
>  /**
>   * of_icc_get() - get a path handle from a DT node based on name
> diff --git a/include/linux/interconnect-provider.h b/include/linux/interconnect-provider.h
> index 0c494534b4d3..cc965b8fab53 100644
> --- a/include/linux/interconnect-provider.h
> +++ b/include/linux/interconnect-provider.h
> @@ -103,6 +103,7 @@ void icc_node_del(struct icc_node *node);
>  int icc_nodes_remove(struct icc_provider *provider);
>  int icc_provider_add(struct icc_provider *provider);
>  int icc_provider_del(struct icc_provider *provider);
> +struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec);
>  
>  #else
>  
> @@ -154,6 +155,11 @@ static inline int icc_provider_del(struct icc_provider *provider)
>  	return -ENOTSUPP;
>  }
>  
> +struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)

Please make this static inline, as we may see a warning in some configurations:

In file included from drivers/devfreq/exynos-bus.c:18:
./include/linux/interconnect-provider.h:160:18: warning: no previous prototype
for ‘of_icc_get_from_provider’ [-Wmissing-prototypes]
  160 | struct icc_node *of_icc_get_from_provider(struct of_phandle_args *spec)
      |                  ^~~~~~~~~~~~~~~~~~~~~~~~

> +{
> +	return ERR_PTR(-ENOTSUPP);
> +}
> +
>  #endif /* CONFIG_INTERCONNECT */
>  
>  #endif /* __LINUX_INTERCONNECT_PROVIDER_H */
> 

Thanks,
Georgi