Re: [PATCH] ttm/drm: constify ttm_backend_func structures

[Christian König <deathsimple@xxxxxxxxxxx>]

On 11.12.2015 14:37, Julia Lawall wrote:
> The ttm_backend_func structures are never modified, so declare them as
> const.
>
> Done with the help of Coccinelle.
>
> Signed-off-by: Julia Lawall <Julia.Lawall@xxxxxxx>

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

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c |    2 +-
>   drivers/gpu/drm/ast/ast_ttm.c           |    2 +-
>   drivers/gpu/drm/bochs/bochs_mm.c        |    2 +-
>   drivers/gpu/drm/cirrus/cirrus_ttm.c     |    2 +-
>   drivers/gpu/drm/mgag200/mgag200_ttm.c   |    2 +-
>   drivers/gpu/drm/nouveau/nouveau_sgdma.c |    4 ++--
>   drivers/gpu/drm/qxl/qxl_ttm.c           |    2 +-
>   drivers/gpu/drm/radeon/radeon_ttm.c     |    2 +-
>   drivers/gpu/drm/ttm/ttm_agp_backend.c   |    2 +-
>   drivers/gpu/drm/virtio/virtgpu_ttm.c    |    2 +-
>   drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c  |    2 +-
>   include/drm/ttm/ttm_bo_driver.h         |    2 +-
>   12 files changed, 13 insertions(+), 13 deletions(-)
>
> diff --git a/drivers/gpu/drm/virtio/virtgpu_ttm.c b/drivers/gpu/drm/virtio/virtgpu_ttm.c
> index 9fd924c..a323422 100644
> --- a/drivers/gpu/drm/virtio/virtgpu_ttm.c
> +++ b/drivers/gpu/drm/virtio/virtgpu_ttm.c
> @@ -319,7 +319,7 @@ static void virtio_gpu_ttm_backend_destroy(struct ttm_tt *ttm)
>   	kfree(gtt);
>   }
>   
> -static struct ttm_backend_func virtio_gpu_backend_func = {
> +static const struct ttm_backend_func virtio_gpu_backend_func = {
>   	.bind = &virtio_gpu_ttm_backend_bind,
>   	.unbind = &virtio_gpu_ttm_backend_unbind,
>   	.destroy = &virtio_gpu_ttm_backend_destroy,
> diff --git a/drivers/gpu/drm/radeon/radeon_ttm.c b/drivers/gpu/drm/radeon/radeon_ttm.c
> index e343074..9fa758c 100644
> --- a/drivers/gpu/drm/radeon/radeon_ttm.c
> +++ b/drivers/gpu/drm/radeon/radeon_ttm.c
> @@ -666,7 +666,7 @@ static void radeon_ttm_backend_destroy(struct ttm_tt *ttm)
>   	kfree(gtt);
>   }
>   
> -static struct ttm_backend_func radeon_backend_func = {
> +static const struct ttm_backend_func radeon_backend_func = {
>   	.bind = &radeon_ttm_backend_bind,
>   	.unbind = &radeon_ttm_backend_unbind,
>   	.destroy = &radeon_ttm_backend_destroy,
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index d4bac5f..befa9c2 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -634,7 +634,7 @@ static void amdgpu_ttm_backend_destroy(struct ttm_tt *ttm)
>   	kfree(gtt);
>   }
>   
> -static struct ttm_backend_func amdgpu_backend_func = {
> +static const struct ttm_backend_func amdgpu_backend_func = {
>   	.bind = &amdgpu_ttm_backend_bind,
>   	.unbind = &amdgpu_ttm_backend_unbind,
>   	.destroy = &amdgpu_ttm_backend_destroy,
> diff --git a/drivers/gpu/drm/ast/ast_ttm.c b/drivers/gpu/drm/ast/ast_ttm.c
> index 08f82ea..5840785 100644
> --- a/drivers/gpu/drm/ast/ast_ttm.c
> +++ b/drivers/gpu/drm/ast/ast_ttm.c
> @@ -203,7 +203,7 @@ static void ast_ttm_backend_destroy(struct ttm_tt *tt)
>   	kfree(tt);
>   }
>   
> -static struct ttm_backend_func ast_tt_backend_func = {
> +static const struct ttm_backend_func ast_tt_backend_func = {
>   	.destroy = &ast_ttm_backend_destroy,
>   };
>   
> diff --git a/drivers/gpu/drm/bochs/bochs_mm.c b/drivers/gpu/drm/bochs/bochs_mm.c
> index d812ad0..b5b782d 100644
> --- a/drivers/gpu/drm/bochs/bochs_mm.c
> +++ b/drivers/gpu/drm/bochs/bochs_mm.c
> @@ -180,7 +180,7 @@ static void bochs_ttm_backend_destroy(struct ttm_tt *tt)
>   	kfree(tt);
>   }
>   
> -static struct ttm_backend_func bochs_tt_backend_func = {
> +static const struct ttm_backend_func bochs_tt_backend_func = {
>   	.destroy = &bochs_ttm_backend_destroy,
>   };
>   
> diff --git a/drivers/gpu/drm/cirrus/cirrus_ttm.c b/drivers/gpu/drm/cirrus/cirrus_ttm.c
> index dfffd52..da88541 100644
> --- a/drivers/gpu/drm/cirrus/cirrus_ttm.c
> +++ b/drivers/gpu/drm/cirrus/cirrus_ttm.c
> @@ -203,7 +203,7 @@ static void cirrus_ttm_backend_destroy(struct ttm_tt *tt)
>   	kfree(tt);
>   }
>   
> -static struct ttm_backend_func cirrus_tt_backend_func = {
> +static const struct ttm_backend_func cirrus_tt_backend_func = {
>   	.destroy = &cirrus_ttm_backend_destroy,
>   };
>   
> diff --git a/drivers/gpu/drm/mgag200/mgag200_ttm.c b/drivers/gpu/drm/mgag200/mgag200_ttm.c
> index 05108b5..e368562 100644
> --- a/drivers/gpu/drm/mgag200/mgag200_ttm.c
> +++ b/drivers/gpu/drm/mgag200/mgag200_ttm.c
> @@ -203,7 +203,7 @@ static void mgag200_ttm_backend_destroy(struct ttm_tt *tt)
>   	kfree(tt);
>   }
>   
> -static struct ttm_backend_func mgag200_tt_backend_func = {
> +static const struct ttm_backend_func mgag200_tt_backend_func = {
>   	.destroy = &mgag200_ttm_backend_destroy,
>   };
>   
> diff --git a/drivers/gpu/drm/nouveau/nouveau_sgdma.c b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> index 8c3053a..3b8f556 100644
> --- a/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> +++ b/drivers/gpu/drm/nouveau/nouveau_sgdma.c
> @@ -51,7 +51,7 @@ nv04_sgdma_unbind(struct ttm_tt *ttm)
>   	return 0;
>   }
>   
> -static struct ttm_backend_func nv04_sgdma_backend = {
> +static const struct ttm_backend_func nv04_sgdma_backend = {
>   	.bind			= nv04_sgdma_bind,
>   	.unbind			= nv04_sgdma_unbind,
>   	.destroy		= nouveau_sgdma_destroy
> @@ -82,7 +82,7 @@ nv50_sgdma_unbind(struct ttm_tt *ttm)
>   	return 0;
>   }
>   
> -static struct ttm_backend_func nv50_sgdma_backend = {
> +static const struct ttm_backend_func nv50_sgdma_backend = {
>   	.bind			= nv50_sgdma_bind,
>   	.unbind			= nv50_sgdma_unbind,
>   	.destroy		= nouveau_sgdma_destroy
> diff --git a/drivers/gpu/drm/qxl/qxl_ttm.c b/drivers/gpu/drm/qxl/qxl_ttm.c
> index 0cbc4c9..93dc45d 100644
> --- a/drivers/gpu/drm/qxl/qxl_ttm.c
> +++ b/drivers/gpu/drm/qxl/qxl_ttm.c
> @@ -288,7 +288,7 @@ static void qxl_ttm_backend_destroy(struct ttm_tt *ttm)
>   	kfree(gtt);
>   }
>   
> -static struct ttm_backend_func qxl_backend_func = {
> +static const struct ttm_backend_func qxl_backend_func = {
>   	.bind = &qxl_ttm_backend_bind,
>   	.unbind = &qxl_ttm_backend_unbind,
>   	.destroy = &qxl_ttm_backend_destroy,
> diff --git a/drivers/gpu/drm/ttm/ttm_agp_backend.c b/drivers/gpu/drm/ttm/ttm_agp_backend.c
> index 764be36..5fdaba5 100644
> --- a/drivers/gpu/drm/ttm/ttm_agp_backend.c
> +++ b/drivers/gpu/drm/ttm/ttm_agp_backend.c
> @@ -104,7 +104,7 @@ static void ttm_agp_destroy(struct ttm_tt *ttm)
>   	kfree(agp_be);
>   }
>   
> -static struct ttm_backend_func ttm_agp_func = {
> +static const struct ttm_backend_func ttm_agp_func = {
>   	.bind = ttm_agp_bind,
>   	.unbind = ttm_agp_unbind,
>   	.destroy = ttm_agp_destroy,
> diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
> index 3329f62..d59572a 100644
> --- a/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
> +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_buffer.c
> @@ -683,7 +683,7 @@ static void vmw_ttm_unpopulate(struct ttm_tt *ttm)
>   		ttm_pool_unpopulate(ttm);
>   }
>   
> -static struct ttm_backend_func vmw_ttm_func = {
> +static const struct ttm_backend_func vmw_ttm_func = {
>   	.bind = vmw_ttm_bind,
>   	.unbind = vmw_ttm_unbind,
>   	.destroy = vmw_ttm_destroy,
> diff --git a/include/drm/ttm/ttm_bo_driver.h b/include/drm/ttm/ttm_bo_driver.h
> index 813042c..c43efa4 100644
> --- a/include/drm/ttm/ttm_bo_driver.h
> +++ b/include/drm/ttm/ttm_bo_driver.h
> @@ -113,7 +113,7 @@ enum ttm_caching_state {
>   
>   struct ttm_tt {
>   	struct ttm_bo_device *bdev;
> -	struct ttm_backend_func *func;
> +	const struct ttm_backend_func *func;
>   	struct page *dummy_read_page;
>   	struct page **pages;
>   	uint32_t page_flags;
>
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