linux-kernel - Re: [PATCH] drm: amd: amdgpu: constify ttm

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Date:   Sun, 2 Jul 2017 14:44:47 +0200
From:   Christian König <deathsimple@...afone.de>
To:     Arvind Yadav <arvind.yadav.cs@...il.com>,
        alexander.deucher@....com, christian.koenig@....com,
        airlied@...ux.ie
Cc:     dri-devel@...ts.freedesktop.org, amd-gfx@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm: amd: amdgpu: constify ttm_place structures.

Am 02.07.2017 um 11:13 schrieb Arvind Yadav:
> ttm_place are not supposed to change at runtime. All functions
> working with ttm_place provided by <drm/ttm/ttm_placement.h> work
> with const ttm_place. So mark the non-const structs as const.
>
> Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>

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

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> index 5db0230..a2c8380 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ttm.c
> @@ -186,7 +186,7 @@ static void amdgpu_evict_flags(struct ttm_buffer_object *bo,
>   {
>   	struct amdgpu_device *adev = amdgpu_ttm_adev(bo->bdev);
>   	struct amdgpu_bo *abo;
> -	static struct ttm_place placements = {
> +	static const struct ttm_place placements = {
>   		.fpfn = 0,
>   		.lpfn = 0,
>   		.flags = TTM_PL_MASK_CACHING | TTM_PL_FLAG_SYSTEM