ui/ozone: Flush CPU caches when mapping/unmapping prime pixmap

content/common/sandbox_linux/bpf_renderer_policy_linux.cc

Index: content/common/sandbox_linux/bpf_renderer_policy_linux.cc
diff --git a/content/common/sandbox_linux/bpf_renderer_policy_linux.cc b/content/common/sandbox_linux/bpf_renderer_policy_linux.cc
index a3e74389425729b4762cb22e7d5acddd717a3281..037caef457527ce6f066ff45f5c538179335e5fd 100644
--- a/content/common/sandbox_linux/bpf_renderer_policy_linux.cc
+++ b/content/common/sandbox_linux/bpf_renderer_policy_linux.cc
@@ -5,6 +5,19 @@
 #include "content/common/sandbox_linux/bpf_renderer_policy_linux.h"
 
 #include <errno.h>
+#if defined(OS_CHROMEOS)
+/*
+ * TODO(vignatti): replace the local definitions below with #include
+ * <linux/dma-buf.h> once kernel version 4.6 becomes widely used.

[spang, 2016/03/30 21:03:24]

Use C++ style comment.

This whole block should go after all of the includes, not in the middle of them.

[vignatti (out of this project), 2016/03/30 21:13:56]

Done.

+ */
+#include <linux/types.h>
+
+struct local_dma_buf_sync {
+        __u64 flags;
+};
+#define LOCAL_DMA_BUF_BASE            'b'
+#define LOCAL_DMA_BUF_IOCTL_SYNC      _IOW(LOCAL_DMA_BUF_BASE, 0, struct local_dma_buf_sync)
+#endif
 #include <sys/ioctl.h>
 
 #include "build/build_config.h"
@@ -30,6 +43,10 @@ ResultExpr RestrictIoctl() {
   return Switch(request)
       .SANDBOX_BPF_DSL_CASES((static_cast<unsigned long>(TCGETS), FIONREAD),
                              Allow())
+#if defined(OS_CHROMEOS)
+      .SANDBOX_BPF_DSL_CASES((static_cast<unsigned long>(LOCAL_DMA_BUF_IOCTL_SYNC)),
+                             Allow())
+#endif
       .Default(sandbox::CrashSIGSYSIoctl());
 }