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

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Message-ID: <19cb207a-10a5-8e72-227b-a96d7dbc16f3@st.com>
Date:   Thu, 15 Sep 2016 17:15:15 +0200
From:   Vincent ABRIOU <vincent.abriou@...com>
To:     Baoyou Xie <baoyou.xie@...aro.org>,
        "benjamin.gaignard@...aro.org" <benjamin.gaignard@...aro.org>,
        "airlied@...ux.ie" <airlied@...ux.ie>
CC:     "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "arnd@...db.de" <arnd@...db.de>,
        "xie.baoyou@....com.cn" <xie.baoyou@....com.cn>
Subject: Re: [PATCH] drm/sti: mark symbols static where possible

Acked-by: Vincent Abriou <vincent.abriou@...com>

On 09/15/2016 01:39 PM, Baoyou Xie wrote:
> We get 4 warnings when building kernel with W=1:
> drivers/gpu/drm/sti/sti_gdp.c:476:5: warning: no previous prototype for 'sti_gdp_field_cb' [-Wmissing-prototypes]
> drivers/gpu/drm/sti/sti_hqvdp.c:786:5: warning: no previous prototype for 'sti_hqvdp_vtg_cb' [-Wmissing-prototypes]
> drivers/gpu/drm/sti/sti_hqvdp.c:1292:5: warning: no previous prototype for 'sti_hqvdp_bind' [-Wmissing-prototypes]
> drivers/gpu/drm/sti/sti_drv.c:143:6: warning: no previous prototype for 'sti_drm_dbg_cleanup' [-Wmissing-prototypes]
>
> In fact, these 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 these functions with 'static'.
>
> Signed-off-by: Baoyou Xie <baoyou.xie@...aro.org>
> ---
>  drivers/gpu/drm/sti/sti_drv.c   | 2 +-
>  drivers/gpu/drm/sti/sti_gdp.c   | 2 +-
>  drivers/gpu/drm/sti/sti_hqvdp.c | 5 +++--
>  3 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/gpu/drm/sti/sti_drv.c b/drivers/gpu/drm/sti/sti_drv.c
> index 7cd3804..e6f0706 100644
> --- a/drivers/gpu/drm/sti/sti_drv.c
> +++ b/drivers/gpu/drm/sti/sti_drv.c
> @@ -140,7 +140,7 @@ err:
>  	return ret;
>  }
>
> -void sti_drm_dbg_cleanup(struct drm_minor *minor)
> +static void sti_drm_dbg_cleanup(struct drm_minor *minor)
>  {
>  	drm_debugfs_remove_files(sti_drm_dbg_list,
>  				 ARRAY_SIZE(sti_drm_dbg_list), minor);
> diff --git a/drivers/gpu/drm/sti/sti_gdp.c b/drivers/gpu/drm/sti/sti_gdp.c
> index b8d942c..4648d1b 100644
> --- a/drivers/gpu/drm/sti/sti_gdp.c
> +++ b/drivers/gpu/drm/sti/sti_gdp.c
> @@ -473,7 +473,7 @@ static void sti_gdp_disable(struct sti_gdp *gdp)
>   * RETURNS:
>   * 0 on success.
>   */
> -int sti_gdp_field_cb(struct notifier_block *nb,
> +static int sti_gdp_field_cb(struct notifier_block *nb,
>  		unsigned long event, void *data)
>  {
>  	struct sti_gdp *gdp = container_of(nb, struct sti_gdp, vtg_field_nb);
> diff --git a/drivers/gpu/drm/sti/sti_hqvdp.c b/drivers/gpu/drm/sti/sti_hqvdp.c
> index b5ee783..7f0dea8 100644
> --- a/drivers/gpu/drm/sti/sti_hqvdp.c
> +++ b/drivers/gpu/drm/sti/sti_hqvdp.c
> @@ -783,7 +783,8 @@ static void sti_hqvdp_disable(struct sti_hqvdp *hqvdp)
>   * RETURNS:
>   * 0 on success.
>   */
> -int sti_hqvdp_vtg_cb(struct notifier_block *nb, unsigned long evt, void *data)
> +static int
> +sti_hqvdp_vtg_cb(struct notifier_block *nb, unsigned long evt, void *data)
>  {
>  	struct sti_hqvdp *hqvdp = container_of(nb, struct sti_hqvdp, vtg_nb);
>  	int btm_cmd_offset, top_cmd_offest;
> @@ -1289,7 +1290,7 @@ static struct drm_plane *sti_hqvdp_create(struct drm_device *drm_dev,
>  	return &hqvdp->plane.drm_plane;
>  }
>
> -int sti_hqvdp_bind(struct device *dev, struct device *master, void *data)
> +static int sti_hqvdp_bind(struct device *dev, struct device *master, void *data)
>  {
>  	struct sti_hqvdp *hqvdp = dev_get_drvdata(dev);
>  	struct drm_device *drm_dev = data;
>