From b5e80aecc4b10f73196f272598bac0644f196471 Mon Sep 17 00:00:00 2001
From: Jesse Gross <jesse@nicira.com>
Date: Sun, 11 Apr 2010 09:52:40 -0400
Subject: [PATCH] datapath: Add rtnl_is_locked compatibility function.
rtnl_is_locked wasn't added until 2.6.26 so provide an implementation
of it.
---
.../linux-2.6/compat-2.6/include/linux/rtnetlink.h | 13 +++++++++++++
1 file changed, 13 insertions(+)
diff --git a/datapath/linux-2.6/compat-2.6/include/linux/rtnetlink.h b/datapath/linux-2.6/compat-2.6/include/linux/rtnetlink.h
index 4d7bd784b..dcee31872 100644
--- a/datapath/linux-2.6/compat-2.6/include/linux/rtnetlink.h
+++ b/datapath/linux-2.6/compat-2.6/include/linux/rtnetlink.h
@@ -30,4 +30,17 @@ static inline void rtnl_set_sk_err(struct net *net, u32 group, int error)
((void) rtnl_notify(skb, net, pid, group, nlh, flags))
#endif
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,26)
+static inline int rtnl_is_locked(void)
+{
+ if (unlikely(rtnl_trylock())) {
+ rtnl_unlock();
+ return 0;
+ }
+
+ return 1;
+}
+
+#endif
+
#endif /* linux/rtnetlink.h wrapper */
--
2.47.0