[PATCH] drm/amdgpu: use correct rounding macro for 64-bit

[Christian König]

Am 10.06.21 um 05:03 schrieb Dave Airlie:
> From: Dave Airlie <airlied at redhat.com>
>
> This fixes 32-bit arm build due to lack of 64-bit divides.
>
> Fixes: cb1c81467af3 ("drm/ttm: flip the switch for driver allocated resources v2")
> Signed-off-by: Dave Airlie <airlied at redhat.com>

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

I was already wondering why we suddenly have a 64bit division here, but 
couldn't see it of hand.

Should I push that to drm-misc-next?

Thanks,
Christian.

> ---
>   drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> index 9a6df02477ce..436ec246a7da 100644
> --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vram_mgr.c
> @@ -407,7 +407,7 @@ static int amdgpu_vram_mgr_new(struct ttm_resource_manager *man,
>   #endif
>   		pages_per_node = max_t(uint32_t, pages_per_node,
>   				       tbo->page_alignment);
> -		num_nodes = DIV_ROUND_UP(PFN_UP(mem_bytes), pages_per_node);
> +		num_nodes = DIV_ROUND_UP_ULL(PFN_UP(mem_bytes), pages_per_node);
>   	}
>   
>   	node = kvmalloc(struct_size(node, mm_nodes, num_nodes),