Quoting Chunming Zhou (2018-02-09 02:44:08)
> it will be used to check if the driver needs swiotlb
> v2: Don't use inline, instead, move function to drm_memory.c (Mechel Daenzer <michel@xxxxxxxxxxx>)
>
> Change-Id: Idbe47af8f12032d4803bb3d47273e807f19169c3
> Signed-off-by: Chunming Zhou <david1.zhou@xxxxxxx>
> Reviewed-by: Monk Liu <monk.liu@xxxxxxx>
> Reviewed-by: Christian König <christian.koenig@xxxxxxx>
> ---
> drivers/gpu/drm/drm_memory.c | 13 +++++++++++++
> include/drm/drm_cache.h | 2 ++
> 2 files changed, 15 insertions(+)
>
> diff --git a/drivers/gpu/drm/drm_memory.c b/drivers/gpu/drm/drm_memory.c
> index fc0ebd273ef8..7ca500b8c399 100644
> --- a/drivers/gpu/drm/drm_memory.c
> +++ b/drivers/gpu/drm/drm_memory.c
> @@ -149,3 +149,16 @@ void drm_legacy_ioremapfree(struct drm_local_map *map, struct drm_device *dev)
> iounmap(map->handle);
> }
> EXPORT_SYMBOL(drm_legacy_ioremapfree);
> +
> +u64 drm_get_max_iomem(void)
> +{
> + struct resource *tmp;
> + u64 max_iomem = 0;
> +
> + for (tmp = iomem_resource.child; tmp; tmp = tmp->sibling) {
> + max_iomem = max(max_iomem, tmp->end);
Note that resource.end is of type resource_size_t which is not u64 on
32b.
Either use max_t(u64) or resource_size_t max_iomem with the implicit
cast on the return.
-Chris
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