[Intel-gfx] [PATCH 2/2] drm/i915: Use remap_io_mapping() to prefault all PTE in a single pass

[Joonas Lahtinen]

On ma, 2016-08-15 at 12:53 +0100, Chris Wilson wrote:
> +int remap_io_mapping(struct vm_area_struct *vma,
> +		     unsigned long addr, unsigned long pfn, unsigned long size,
> +		     struct io_mapping *iomap)
> +{
> +	struct remap_pfn r;
> +	int err;
> +
> +#define MUST_SET (VM_IO | VM_PFNMAP | VM_DONTEXPAND | VM_DONTDUMP)
> +	if (WARN_ON((vma->vm_flags & MUST_SET) != MUST_SET))
> +		return -EINVAL;
> +#undef MUST_SET

#define is bit overkill...

Other than that, should do the job.

Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Regards, Joonas
-- 
Joonas Lahtinen
Open Source Technology Center
Intel Corporation