Openvswitch uses function from NET_IPGRE_DEMUX module.
Add Kconfig dependency to fix compilation errors.

CC: Jesse Gross <je...@nicira.com>
Reported-by: Randy Dunlap <rdun...@infradead.org>
Signed-off-by: Pravin Shelar <pshe...@nicira.com>
---
 net/openvswitch/Kconfig     |    1 +
 net/openvswitch/vport-gre.c |    2 --
 net/openvswitch/vport.c     |    3 ---
 3 files changed, 1 insertions(+), 5 deletions(-)

diff --git a/net/openvswitch/Kconfig b/net/openvswitch/Kconfig
index 9fbc04a..9fc0df2 100644
--- a/net/openvswitch/Kconfig
+++ b/net/openvswitch/Kconfig
@@ -4,6 +4,7 @@
 
 config OPENVSWITCH
        tristate "Open vSwitch"
+       depends on NET_IPGRE_DEMUX
        ---help---
          Open vSwitch is a multilayer Ethernet switch targeted at virtualized
          environments.  In addition to supporting a variety of features
diff --git a/net/openvswitch/vport-gre.c b/net/openvswitch/vport-gre.c
index 943e5c4..21d5073 100644
--- a/net/openvswitch/vport-gre.c
+++ b/net/openvswitch/vport-gre.c
@@ -16,7 +16,6 @@
  * 02110-1301, USA
  */
 
-#if IS_ENABLED(CONFIG_NET_IPGRE_DEMUX)
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
 #include <linux/if.h>
@@ -271,4 +270,3 @@ const struct vport_ops ovs_gre_vport_ops = {
        .get_name       = gre_get_name,
        .send           = gre_tnl_send,
 };
-#endif
diff --git a/net/openvswitch/vport.c b/net/openvswitch/vport.c
index ba81294..ba240a8 100644
--- a/net/openvswitch/vport.c
+++ b/net/openvswitch/vport.c
@@ -38,10 +38,7 @@
 static const struct vport_ops *vport_ops_list[] = {
        &ovs_netdev_vport_ops,
        &ovs_internal_vport_ops,
-
-#if IS_ENABLED(CONFIG_NET_IPGRE_DEMUX)
        &ovs_gre_vport_ops,
-#endif
 };
 
 /* Protected by RCU read lock for reading, ovs_mutex for writing. */
-- 
1.7.1

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