On Fri, Oct 30, 2020 at 6:11 AM Daniel Vetter <daniel.vetter@xxxxxxxx> wrote:
>
> It's nice if a big function/ioctl table like this is const. Only
> downside here is that we need a few more #ifdef to paper over the
> differences when CONFIG_DRM_LEGACY is enabled. Maybe provides more
> motivation to sunset that horror show :-)
>
> v2:
> - Fix super important checkpatch warning (Sam)
> - Update the kerneldoc example too (Sam)
>
> Acked-by: Maxime Ripard <mripard@xxxxxxxxxx>
> Reviewed-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Acked-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxxx>
> Cc: Sam Ravnborg <sam@xxxxxxxxxxxx>
> Cc: Maarten Lankhorst <maarten.lankhorst@xxxxxxxxxxxxxxx>
> Cc: Maxime Ripard <mripard@xxxxxxxxxx>
> Cc: Thomas Zimmermann <tzimmermann@xxxxxxx>
> Cc: David Airlie <airlied@xxxxxxxx>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
Reviewed-by: Alex Deucher <alexander.deucher@xxxxxxx>
> ---
> drivers/gpu/drm/drm_drv.c | 17 +++++++++++------
> include/drm/drm_device.h | 4 ++++
> include/drm/drm_drv.h | 5 +++--
> 3 files changed, 18 insertions(+), 8 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_drv.c b/drivers/gpu/drm/drm_drv.c
> index 457ac0f82be2..0371d1f095b2 100644
> --- a/drivers/gpu/drm/drm_drv.c
> +++ b/drivers/gpu/drm/drm_drv.c
> @@ -284,7 +284,7 @@ void drm_minor_release(struct drm_minor *minor)
> * struct clk *pclk;
> * };
> *
> - * static struct drm_driver driver_drm_driver = {
> + * static const struct drm_driver driver_drm_driver = {
> * [...]
> * };
> *
> @@ -574,7 +574,7 @@ static void drm_dev_init_release(struct drm_device *dev, void *res)
> }
>
> static int drm_dev_init(struct drm_device *dev,
> - struct drm_driver *driver,
> + const struct drm_driver *driver,
> struct device *parent)
> {
> int ret;
> @@ -589,7 +589,11 @@ static int drm_dev_init(struct drm_device *dev,
>
> kref_init(&dev->ref);
> dev->dev = get_device(parent);
> +#ifdef CONFIG_DRM_LEGACY
> + dev->driver = (struct drm_driver *)driver;
> +#else
> dev->driver = driver;
> +#endif
>
> INIT_LIST_HEAD(&dev->managed.resources);
> spin_lock_init(&dev->managed.lock);
> @@ -663,7 +667,7 @@ static void devm_drm_dev_init_release(void *data)
>
> static int devm_drm_dev_init(struct device *parent,
> struct drm_device *dev,
> - struct drm_driver *driver)
> + const struct drm_driver *driver)
> {
> int ret;
>
> @@ -678,7 +682,8 @@ static int devm_drm_dev_init(struct device *parent,
> return ret;
> }
>
> -void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver,
> +void *__devm_drm_dev_alloc(struct device *parent,
> + const struct drm_driver *driver,
> size_t size, size_t offset)
> {
> void *container;
> @@ -713,7 +718,7 @@ EXPORT_SYMBOL(__devm_drm_dev_alloc);
> * RETURNS:
> * Pointer to new DRM device, or ERR_PTR on failure.
> */
> -struct drm_device *drm_dev_alloc(struct drm_driver *driver,
> +struct drm_device *drm_dev_alloc(const struct drm_driver *driver,
> struct device *parent)
> {
> struct drm_device *dev;
> @@ -858,7 +863,7 @@ static void remove_compat_control_link(struct drm_device *dev)
> */
> int drm_dev_register(struct drm_device *dev, unsigned long flags)
> {
> - struct drm_driver *driver = dev->driver;
> + const struct drm_driver *driver = dev->driver;
> int ret;
>
> if (!driver->load)
> diff --git a/include/drm/drm_device.h b/include/drm/drm_device.h
> index f4f68e7a9149..2c361964aee7 100644
> --- a/include/drm/drm_device.h
> +++ b/include/drm/drm_device.h
> @@ -83,7 +83,11 @@ struct drm_device {
> } managed;
>
> /** @driver: DRM driver managing the device */
> +#ifdef CONFIG_DRM_LEGACY
> struct drm_driver *driver;
> +#else
> + const struct drm_driver *driver;
> +#endif
>
> /**
> * @dev_private:
> diff --git a/include/drm/drm_drv.h b/include/drm/drm_drv.h
> index 7af220226a25..cc9da43b6eda 100644
> --- a/include/drm/drm_drv.h
> +++ b/include/drm/drm_drv.h
> @@ -516,7 +516,8 @@ struct drm_driver {
> #endif
> };
>
> -void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver,
> +void *__devm_drm_dev_alloc(struct device *parent,
> + const struct drm_driver *driver,
> size_t size, size_t offset);
>
> /**
> @@ -549,7 +550,7 @@ void *__devm_drm_dev_alloc(struct device *parent, struct drm_driver *driver,
> ((type *) __devm_drm_dev_alloc(parent, driver, sizeof(type), \
> offsetof(type, member)))
>
> -struct drm_device *drm_dev_alloc(struct drm_driver *driver,
> +struct drm_device *drm_dev_alloc(const struct drm_driver *driver,
> struct device *parent);
> int drm_dev_register(struct drm_device *dev, unsigned long flags);
> void drm_dev_unregister(struct drm_device *dev);
> --
> 2.28.0
>
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