[Intel-gfx] [PATCH] drm/i915/selftests: Switch 4k kmalloc to use get_free_page for alignment

[Matthew Auld]

On Wed, 23 Sep 2020 at 12:42, Chris Wilson <chris at chris-wilson.co.uk> wrote:
>
> In generating the reference LRC, we want a page-aligned address for
> simplicity in computing the offsets within. This then shares the
> computation for the HW LRC which is mapped and so page aligned, making
> the comparison straightforward. It seems that kmalloc(4k) is not always
> returning from a 4k-aligned slab cache (which would give us a page aligned
> address) so force alignment by explicitly allocating a page.
>
> Reported-by: "Gote, Nitin R" <nitin.r.gote at intel.com>
> Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> Cc: "Gote, Nitin R" <nitin.r.gote at intel.com>
Reviewed-by: Matthew Auld <matthew.auld at intel.com>