From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Tue, 26 Sep 2017 10:53:53 +0100
Subject: drm/i915: Use memset64() to prefill the GTT page
Git-commit: 4dd504f7d98a6719eb2fc1a400257ca1f13d344b
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
Take advantage of optimised memset64() instead of open coding it to
prefill the GTT pages.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20170926095353.11036-1-chris@chris-wilson.co.uk
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/i915/i915_gem_gtt.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
--- a/drivers/gpu/drm/i915/i915_gem_gtt.c
+++ b/drivers/gpu/drm/i915/i915_gem_gtt.c
@@ -481,10 +481,8 @@ static void fill_page_dma(struct i915_ad
const u64 val)
{
u64 * const vaddr = kmap_atomic(p->page);
- int i;
- for (i = 0; i < 512; i++)
- vaddr[i] = val;
+ memset64(vaddr, val, PAGE_SIZE / sizeof(val));
kunmap_atomic(vaddr);
}