linux-kernel - Re: [PATCH] drm/mediatek: mark symbols static where possible

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Date:   Tue, 27 Sep 2016 12:34:31 -0400
From:   Sean Paul <seanpaul@...omium.org>
To:     Baoyou Xie <baoyou.xie@...aro.org>
Cc:     CK HU <ck.hu@...iatek.com>, p.zabel@...gutronix.de,
        Dave Airlie <airlied@...ux.ie>,
        Matthias Brugger <matthias.bgg@...il.com>,
        姚智情 <mark.yao@...k-chips.com>,
        Heiko Stübner <heiko@...ech.de>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Linux ARM Kernel <linux-arm-kernel@...ts.infradead.org>,
        linux-mediatek@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-rockchip@...ts.infradead.org, Arnd Bergmann <arnd@...db.de>,
        Baoyou Xie <xie.baoyou@....com.cn>, han.fei@....com.cn,
        tang.qiang007@....com.cn
Subject: Re: [PATCH] drm/mediatek: mark symbols static where possible

On Sun, Sep 25, 2016 at 3:41 AM, Baoyou Xie <baoyou.xie@...aro.org> wrote:
> We get 4 warnings when building kernel with W=1:
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1089:6: warning: no previous prototype for 'mtk_hdmi_audio_enable' [-Wmissing-prototypes]
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1095:6: warning: no previous prototype for 'mtk_hdmi_audio_disable' [-Wmissing-prototypes]
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1101:5: warning: no previous prototype for 'mtk_hdmi_audio_set_param' [-Wmissing-prototypes]
> drivers/gpu/drm/mediatek/mtk_hdmi.c:1627:5: warning: no previous prototype for 'mtk_hdmi_audio_digital_mute' [-Wmissing-prototypes]
>
> In fact, both functions are only used in the file in which they are
> declared and don't need a declaration, but can be made static.
> So this patch marks both functions with 'static'.
>
> Signed-off-by: Baoyou Xie <baoyou.xie@...aro.org>

Applied to -misc, thanks.

Sean

> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi.c | 9 +++++----
>  1 file changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 334562d..be4e19c 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -1086,19 +1086,19 @@ static int mtk_hdmi_output_init(struct mtk_hdmi *hdmi)
>         return 0;
>  }
>
> -void mtk_hdmi_audio_enable(struct mtk_hdmi *hdmi)
> +static void mtk_hdmi_audio_enable(struct mtk_hdmi *hdmi)
>  {
>         mtk_hdmi_aud_enable_packet(hdmi, true);
>         hdmi->audio_enable = true;
>  }
>
> -void mtk_hdmi_audio_disable(struct mtk_hdmi *hdmi)
> +static void mtk_hdmi_audio_disable(struct mtk_hdmi *hdmi)
>  {
>         mtk_hdmi_aud_enable_packet(hdmi, false);
>         hdmi->audio_enable = false;
>  }
>
> -int mtk_hdmi_audio_set_param(struct mtk_hdmi *hdmi,
> +static int mtk_hdmi_audio_set_param(struct mtk_hdmi *hdmi,
>                              struct hdmi_audio_param *param)
>  {
>         if (!hdmi->audio_enable) {
> @@ -1624,7 +1624,8 @@ static void mtk_hdmi_audio_shutdown(struct device *dev, void *data)
>         mtk_hdmi_audio_disable(hdmi);
>  }
>
> -int mtk_hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
> +static int
> +mtk_hdmi_audio_digital_mute(struct device *dev, void *data, bool enable)
>  {
>         struct mtk_hdmi *hdmi = dev_get_drvdata(dev);
>
> --
> 2.7.4
>