drm: add helper to check for wc memory support
authorDave Airlie <airlied@redhat.com>
Sat, 30 Jan 2016 05:59:32 +0000 (07:59 +0200)
committerAlex Deucher <alexander.deucher@amd.com>
Tue, 2 Feb 2016 15:08:43 +0000 (10:08 -0500)
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
include/drm/drm_cache.h

index 7bfb063029d83fe1374e78a174f4a638bc39bc49..461a0558bca4d8d16e81b88e0286e3fa6251ab79 100644 (file)
 
 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