datapath: Add genl_dereference() and use it.

[openvswitch] / datapath / linux / compat / include / linux / genetlink.h

diff --git a/datapath/linux/compat/include/linux/genetlink.h b/datapath/linux/compat/include/linux/genetlink.h
index e45d08546ef66186b68dd407a0aa69a2449489de..f7b96d967c6f53c60c68fe004bda84bd147e21bb 100644 (file)
--- a/datapath/linux/compat/include/linux/genetlink.h
+++ b/datapath/linux/compat/include/linux/genetlink.h
@@ -12,4 +12,12 @@ static inline int lockdep_genl_is_held(void)
 }
 #endif
 
+/* This is also not upstream yet. */
+#ifndef genl_dereference
+#include <linux/rcupdate.h>
+
+#define genl_dereference(p)                                    \
+       rcu_dereference_protected(p, lockdep_genl_is_held())
+#endif
+
 #endif /* linux/genetlink.h wrapper */