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..7c5a62a883931b865e3b151d6f2d833dec1c12dd 100644
--- a/content/common/sandbox_linux/bpf_renderer_policy_linux.cc
+++ b/content/common/sandbox_linux/bpf_renderer_policy_linux.cc
@@ -5,6 +5,7 @@
 #include "content/common/sandbox_linux/bpf_renderer_policy_linux.h"
 
 #include <errno.h>
+#include <linux/dma-buf.h>
 #include <sys/ioctl.h>
 
 #include "build/build_config.h"
@@ -30,6 +31,8 @@ ResultExpr RestrictIoctl() {
   return Switch(request)
       .SANDBOX_BPF_DSL_CASES((static_cast<unsigned long>(TCGETS), FIONREAD),
                              Allow())
+      .SANDBOX_BPF_DSL_CASES((static_cast<unsigned long>(DMA_BUF_IOCTL_SYNC)),
+                             Allow())

[spang, 2016/03/30 00:19:00]

I'm fairly certain this is going to cause compile errors, and you'll probably
need to scope it narrower than "all linux builds".

[vignatti (out of this project), 2016/03/30 14:58:37]

yeah, I was thinking the same. Did you read what I wrote about that in my last
reply above? I'm thinking to opt out entirely native dma-buf pixmap support for
regular Linuxes...

       .Default(sandbox::CrashSIGSYSIoctl());
 }