backports: add lockdep_rtnl_is_held() for < 3.13 without CONFIG_PROVE_LOCKING

In kernels earlier than 3.13, lockdep_rtnl_is_held() is only declared
in rtnetlink.h when CONFIG_PROVE_LOCKING is not set.  Backport this
function if that's the case.

Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

diff --git a/backport/backport-include/linux/rtnetlink.h b/backport/backport-include/linux/rtnetlink.h
index 9b68be820049fc1eafb2fd108be3fe5930918d9e..59beffa8316ae30cb0ad248bfc23ce8a92abacbd 100644 (file)
--- a/backport/backport-include/linux/rtnetlink.h
+++ b/backport/backport-include/linux/rtnetlink.h
@@ -18,4 +18,12 @@
        ndo_dflt_fdb_add(ndm, tb, dev, addr, flags)
 #endif
 
+#if LINUX_VERSION_IS_LESS(3,13,0) &&           \
+       !defined(CONFIG_PROVE_LOCKING)
+static inline bool lockdep_rtnl_is_held(void)
+{
+       return true;
+}
+#endif
+
 #endif /* __BACKPORT_LINUX_RTNETLINK_H */