Re: [PATCH] drm: Remove defunct dma_buf_kmap stubs

[Christian König <christian.koenig@xxxxxxx>]

Am 07.08.2018 um 19:47 schrieb Chris Wilson:
> Since commit 09ea0dfbf972 ("dma-buf: make map_atomic and map function
> pointers optional"), we no longer need to provide stub no-op functions
> as the core now provides them directly.
>
> References: 09ea0dfbf972 ("dma-buf: make map_atomic and map function pointers optional")
> Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
> Cc: Daniel Vetter <daniel@xxxxxxxx>
> Cc: Gerd Hoffmann <kraxel@xxxxxxxxxx>
> Cc: Alex Deucher <alexander.deucher@xxxxxxx>
> Cc: "Christian König" <christian.koenig@xxxxxxx>

Reviewed-by: Christian König <christian.koenig@xxxxxxx>


> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c |  2 --
>   drivers/gpu/drm/drm_prime.c               | 30 -----------------------
>   include/drm/drm_prime.h                   |  3 ---
>   3 files changed, 35 deletions(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
> index 1c5d97f4b4dd..3fdd5688da0b 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c
> @@ -338,8 +338,6 @@ static const struct dma_buf_ops amdgpu_dmabuf_ops = {
>   	.unmap_dma_buf = drm_gem_unmap_dma_buf,
>   	.release = drm_gem_dmabuf_release,
>   	.begin_cpu_access = amdgpu_gem_begin_cpu_access,
> -	.map = drm_gem_dmabuf_kmap,
> -	.unmap = drm_gem_dmabuf_kunmap,
>   	.mmap = drm_gem_dmabuf_mmap,
>   	.vmap = drm_gem_dmabuf_vmap,
>   	.vunmap = drm_gem_dmabuf_vunmap,
> diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c
> index 186db2e4c57a..e03d3bdaa59b 100644
> --- a/drivers/gpu/drm/drm_prime.c
> +++ b/drivers/gpu/drm/drm_prime.c
> @@ -433,34 +433,6 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr)
>   }
>   EXPORT_SYMBOL(drm_gem_dmabuf_vunmap);
>   
> -/**
> - * drm_gem_dmabuf_kmap - map implementation for GEM
> - * @dma_buf: buffer to be mapped
> - * @page_num: page number within the buffer
> - *
> - * Not implemented. This can be used as the &dma_buf_ops.map callback.
> - */
> -void *drm_gem_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num)
> -{
> -	return NULL;
> -}
> -EXPORT_SYMBOL(drm_gem_dmabuf_kmap);
> -
> -/**
> - * drm_gem_dmabuf_kunmap - unmap implementation for GEM
> - * @dma_buf: buffer to be unmapped
> - * @page_num: page number within the buffer
> - * @addr: virtual address of the buffer
> - *
> - * Not implemented. This can be used as the &dma_buf_ops.unmap callback.
> - */
> -void drm_gem_dmabuf_kunmap(struct dma_buf *dma_buf, unsigned long page_num,
> -			   void *addr)
> -{
> -
> -}
> -EXPORT_SYMBOL(drm_gem_dmabuf_kunmap);
> -
>   /**
>    * drm_gem_dmabuf_mmap - dma_buf mmap implementation for GEM
>    * @dma_buf: buffer to be mapped
> @@ -489,8 +461,6 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops =  {
>   	.map_dma_buf = drm_gem_map_dma_buf,
>   	.unmap_dma_buf = drm_gem_unmap_dma_buf,
>   	.release = drm_gem_dmabuf_release,
> -	.map = drm_gem_dmabuf_kmap,
> -	.unmap = drm_gem_dmabuf_kunmap,
>   	.mmap = drm_gem_dmabuf_mmap,
>   	.vmap = drm_gem_dmabuf_vmap,
>   	.vunmap = drm_gem_dmabuf_vunmap,
> diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h
> index d716d653b096..e2032fbc0f08 100644
> --- a/include/drm/drm_prime.h
> +++ b/include/drm/drm_prime.h
> @@ -93,9 +93,6 @@ void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach,
>   			   enum dma_data_direction dir);
>   void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf);
>   void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr);
> -void *drm_gem_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num);
> -void drm_gem_dmabuf_kunmap(struct dma_buf *dma_buf, unsigned long page_num,
> -			   void *addr);
>   int drm_gem_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma);
>   
>   int drm_prime_sg_to_page_addr_arrays(struct sg_table *sgt, struct page **pages,

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