1 files changed, 6 insertions, 2 deletions

diff --git a/include/linux/rtnetlink.h b/include/linux/rtnetlink.h
index 32e52769a00..91ac97c2077 100644
--- a/include/linux/rtnetlink.h
+++ b/include/linux/rtnetlink.h
@@ -89,10 +89,14 @@ enum {
         RTM_GETANYCAST  = 62,
 #define RTM_GETANYCAST  RTM_GETANYCAST
 
-        RTM_MAX,
-#define RTM_MAX         RTM_MAX
+        __RTM_MAX,
+#define RTM_MAX         (((__RTM_MAX + 3) & ~3) - 1)
 };
 
+#define RTM_NR_MSGTYPES (RTM_MAX + 1 - RTM_BASE)
+#define RTM_NR_FAMILIES (RTM_NR_MSGTYPES >> 2)
+#define RTM_FAM(cmd)    (((cmd) - RTM_BASE) >> 2)
+
 /* 
    Generic structure for encapsulation of optional route information.
    It is reminiscent of sockaddr, but with sa_family replaced