[PATCH] drm/ttm: let struct ttm_device_funcs be placed in rodata

[Alex Deucher]

On Tue, May 16, 2023 at 4:05 AM Jani Nikula <jani.nikula at intel.com> wrote:
>
> On Thu, 09 Mar 2023, Jani Nikula <jani.nikula at intel.com> wrote:
> > On Thu, 09 Mar 2023, Christian König <christian.koenig at amd.com> wrote:
> >> Am 09.03.23 um 13:37 schrieb Jani Nikula:
> >>> Make the struct ttm_device_funcs pointers const so the data can be placed in rodata.
> >>>
> >>> Cc: Christian Koenig <christian.koenig at amd.com>
> >>> Cc: Huang Rui <ray.huang at amd.com>
> >>> Signed-off-by: Jani Nikula <jani.nikula at intel.com>
> >>
> >> Good idea, Reviewed-by: Christian König <christian.koenig at amd.com>
> >
> > Thanks!
> >
> >> Should I push it to drm-misc-next or do you need it on some other branch?
> >
> > Go ahead, I'm not urgently depending on it.
>
> Christian, I guess this fell between the cracks? Can I just push it to
> drm-misc-next?

Go ahead.  Christian is out of the office this week.

Alex

>
> BR,
> Jani.
>
>
> >
> > BR,
> > Jani.
> >
> >>
> >> Christian.
> >>
> >>> ---
> >>>   drivers/gpu/drm/ttm/ttm_device.c | 2 +-
> >>>   include/drm/ttm/ttm_device.h     | 4 ++--
> >>>   2 files changed, 3 insertions(+), 3 deletions(-)
> >>>
> >>> diff --git a/drivers/gpu/drm/ttm/ttm_device.c b/drivers/gpu/drm/ttm/ttm_device.c
> >>> index ae2f19dc9f81..a71bb1362de4 100644
> >>> --- a/drivers/gpu/drm/ttm/ttm_device.c
> >>> +++ b/drivers/gpu/drm/ttm/ttm_device.c
> >>> @@ -190,7 +190,7 @@ EXPORT_SYMBOL(ttm_device_swapout);
> >>>    * Returns:
> >>>    * !0: Failure.
> >>>    */
> >>> -int ttm_device_init(struct ttm_device *bdev, struct ttm_device_funcs *funcs,
> >>> +int ttm_device_init(struct ttm_device *bdev, const struct ttm_device_funcs *funcs,
> >>>                 struct device *dev, struct address_space *mapping,
> >>>                 struct drm_vma_offset_manager *vma_manager,
> >>>                 bool use_dma_alloc, bool use_dma32)
> >>> diff --git a/include/drm/ttm/ttm_device.h b/include/drm/ttm/ttm_device.h
> >>> index 56e82ba2d046..c22f30535c84 100644
> >>> --- a/include/drm/ttm/ttm_device.h
> >>> +++ b/include/drm/ttm/ttm_device.h
> >>> @@ -223,7 +223,7 @@ struct ttm_device {
> >>>      * @funcs: Function table for the device.
> >>>      * Constant after bo device init
> >>>      */
> >>> -   struct ttm_device_funcs *funcs;
> >>> +   const struct ttm_device_funcs *funcs;
> >>>
> >>>     /**
> >>>      * @sysman: Resource manager for the system domain.
> >>> @@ -287,7 +287,7 @@ static inline void ttm_set_driver_manager(struct ttm_device *bdev, int type,
> >>>     bdev->man_drv[type] = manager;
> >>>   }
> >>>
> >>> -int ttm_device_init(struct ttm_device *bdev, struct ttm_device_funcs *funcs,
> >>> +int ttm_device_init(struct ttm_device *bdev, const struct ttm_device_funcs *funcs,
> >>>                 struct device *dev, struct address_space *mapping,
> >>>                 struct drm_vma_offset_manager *vma_manager,
> >>>                 bool use_dma_alloc, bool use_dma32);
> >>
>
> --
> Jani Nikula, Intel Open Source Graphics Center