On 19/12/2016 10:32, Jani Nikula wrote:
On Mon, 19 Dec 2016, Joonas Lahtinen <joonas.lahtinen@xxxxxxxxxxxxxxx> wrote:
On ma, 2016-12-19 at 09:19 +0000, Tvrtko Ursulin wrote:
+++ b/drivers/gpu/drm/i915/i915_gem_fence_reg.c
@@ -631,9 +631,9 @@ i915_gem_swizzle_page(struct page *page)
vaddr = kmap(page);
for (i = 0; i < PAGE_SIZE; i += 128) {
- memcpy(temp, &vaddr[i], 64);
+ memcpy(&temp[0], &vaddr[i], 64);
memcpy(&vaddr[i], &vaddr[i + 64], 64);
- memcpy(&vaddr[i + 64], temp, 64);
+ memcpy(&vaddr[i + 64], &temp[0], 64);
This reeks of GCC bug badly. So I would not apply as next time the bug
could be into the another direction.
Agreed. Please file a bug over at https://gcc.gnu.org/bugs/
Bug filed: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78869
Potentially useful code generation explorer picked up from #gcc:
https://godbolt.org/g/XNioHs
Regards,
Tvrtko
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