1 files changed, 3 insertions, 0 deletions

diff --git a/include/linux/inetdevice.h b/include/linux/inetdevice.h
index 1ef174d83e09..40adefdfe5d1 100644
--- a/include/linux/inetdevice.h
+++ b/include/linux/inetdevice.h
@@ -3,6 +3,7 @@
 
 #ifdef __KERNEL__
 
+#include <linux/bitmap.h>
 #include <linux/if.h>
 #include <linux/netdevice.h>
 #include <linux/rcupdate.h>
@@ -12,6 +13,7 @@ struct ipv4_devconf
 {
         void    *sysctl;
         int     data[__NET_IPV4_CONF_MAX - 1];
+        DECLARE_BITMAP(state, __NET_IPV4_CONF_MAX - 1);
 };
 
 extern struct ipv4_devconf ipv4_devconf;
@@ -53,6 +55,7 @@ static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
                                     int val)
 {
         index--;
+        set_bit(index, in_dev->cnf.state);
         in_dev->cnf.data[index] = val;
 }