drm/i915: Use memset64() to prefill the GTT page
authorChris Wilson <chris@chris-wilson.co.uk>
Tue, 26 Sep 2017 09:53:53 +0000 (10:53 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Thu, 28 Sep 2017 20:00:48 +0000 (21:00 +0100)
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>
drivers/gpu/drm/i915/i915_gem_gtt.c

index 64d785262d1447b18b9b7e5362e6ce3cc0017184..4c82ceb8d3186845c2383c624ddaea8edaeba2d0 100644 (file)
@@ -481,10 +481,8 @@ static void fill_page_dma(struct i915_address_space *vm,
                          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);
 }