Re: [PATCH v4 02/10] drm/cma-helper: Remove empty drm_gem_cma_prime_vunmap()

[Christian König <christian.koenig@xxxxxxx>]

Am 15.10.20 um 14:37 schrieb Thomas Zimmermann:
> The function drm_gem_cma_prime_vunmap() is empty. Remove it before
> changing the interface to use struct drm_buf_map.
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
Reviewed-by: Christian König <christian.koenig@xxxxxxx>

> ---
>   drivers/gpu/drm/drm_gem_cma_helper.c | 17 -----------------
>   drivers/gpu/drm/vc4/vc4_bo.c         |  1 -
>   include/drm/drm_gem_cma_helper.h     |  1 -
>   3 files changed, 19 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_gem_cma_helper.c 
> b/drivers/gpu/drm/drm_gem_cma_helper.c
> index 2165633c9b9e..d527485ea0b7 100644
> --- a/drivers/gpu/drm/drm_gem_cma_helper.c
> +++ b/drivers/gpu/drm/drm_gem_cma_helper.c
> @@ -537,23 +537,6 @@ void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj)
>   }
>   EXPORT_SYMBOL_GPL(drm_gem_cma_prime_vmap);
>   
> -/**
> - * drm_gem_cma_prime_vunmap - unmap a CMA GEM object from the kernel's virtual
> - *     address space
> - * @obj: GEM object
> - * @vaddr: kernel virtual address where the CMA GEM object was mapped
> - *
> - * This function removes a buffer exported via DRM PRIME from the kernel's
> - * virtual address space. This is a no-op because CMA buffers cannot be
> - * unmapped from kernel space. Drivers using the CMA helpers should set this
> - * as their &drm_gem_object_funcs.vunmap callback.
> - */
> -void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr)
> -{
> -       /* Nothing to do */
> -}
> -EXPORT_SYMBOL_GPL(drm_gem_cma_prime_vunmap);
> -
>   static const struct drm_gem_object_funcs drm_gem_cma_default_funcs = {
>         .free = drm_gem_cma_free_object,
>         .print_info = drm_gem_cma_print_info,
> diff --git a/drivers/gpu/drm/vc4/vc4_bo.c b/drivers/gpu/drm/vc4/vc4_bo.c
> index f432278173cd..557f0d1e6437 100644
> --- a/drivers/gpu/drm/vc4/vc4_bo.c
> +++ b/drivers/gpu/drm/vc4/vc4_bo.c
> @@ -387,7 +387,6 @@ static const struct drm_gem_object_funcs 
> vc4_gem_object_funcs = {
>         .export = vc4_prime_export,
>         .get_sg_table = drm_gem_cma_prime_get_sg_table,
>         .vmap = vc4_prime_vmap,
> -       .vunmap = drm_gem_cma_prime_vunmap,
>         .vm_ops = &vc4_vm_ops,
>   };
>   
> diff --git a/include/drm/drm_gem_cma_helper.h b/include/drm/drm_gem_cma_helper.h
> index 2bfa2502607a..a064b0d1c480 100644
> --- a/include/drm/drm_gem_cma_helper.h
> +++ b/include/drm/drm_gem_cma_helper.h
> @@ -104,7 +104,6 @@ drm_gem_cma_prime_import_sg_table(struct drm_device *dev,
>   int drm_gem_cma_prime_mmap(struct drm_gem_object *obj,
>                            struct vm_area_struct *vma);
>   void *drm_gem_cma_prime_vmap(struct drm_gem_object *obj);
> -void drm_gem_cma_prime_vunmap(struct drm_gem_object *obj, void *vaddr);
>   
>   struct drm_gem_object *
>   drm_gem_cma_create_object_default_funcs(struct drm_device *dev, size_t size);