4.4-stable review patch. If anyone has any objections, please let me know.
------------------
From: Dave Airlie <airlied@xxxxxxxxxx>
commit 4b0e4e4af6c6dc8354dcb72182d52c1bc55f12fc upstream.
Reviewed-by: Christian König <christian.koenig@xxxxxxx>
Reviewed-by: Michel Dänzer <michel.daenzer@xxxxxxx>
Signed-off-by: Dave Airlie <airlied@xxxxxxxxxx>
Signed-off-by: Oded Gabbay <oded.gabbay@xxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
diff --git a/include/drm/drm_cache.h b/include/drm/drm_cache.h
index 7bfb063029d8..461a0558bca4 100644
--- a/include/drm/drm_cache.h
+++ b/include/drm/drm_cache.h
@@ -35,4 +35,13 @@
void drm_clflush_pages(struct page *pages[], unsigned long num_pages);
+static inline bool drm_arch_can_wc_memory(void)
+{
+#if defined(CONFIG_PPC) && !defined(CONFIG_NOT_COHERENT_CACHE)
+ return false;
+#else
+ return true;
+#endif
+}
+
#endif
--
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