datapath: Check for backported rcu_read_lock_held.

[sliver-openvswitch.git] / acinclude.m4

diff --git a/acinclude.m4 b/acinclude.m4
index 0cd1427..6a829d5 100644 (file)
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -168,6 +168,10 @@ AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [
   OVS_GREP_IFELSE([$KSRC26/include/linux/netdevice.h], [dev_disable_lro])
   OVS_GREP_IFELSE([$KSRC26/include/linux/netdevice.h], [dev_get_stats])
 
+  OVS_GREP_IFELSE([$KSRC26/include/linux/rcupdate.h], [rcu_read_lock_held], [],
+                  [OVS_GREP_IFELSE([$KSRC26/include/linux/rtnetlink.h],
+                                   [rcu_read_lock_held])])
+  
   # Check for the proto_data_valid member in struct sk_buff.  The [^@]
   # is necessary because some versions of this header remove the
   # member but retain the kerneldoc comment that describes it (which
@@ -204,6 +208,8 @@ AC_DEFUN([OVS_CHECK_LINUX26_COMPAT], [
   OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [nla_get_be16])
   OVS_GREP_IFELSE([$KSRC26/include/net/netlink.h], [nla_find_nested])
 
+  OVS_GREP_IFELSE([$KSRC26/include/linux/if_link.h], [rtnl_link_stats64])
+
   OVS_CHECK_LOG2_H
 
   if cmp -s datapath/linux-2.6/kcompat.h.new \