1 files changed, 11 insertions, 0 deletions

diff --git a/sys/netinet/in_var.h b/sys/netinet/in_var.h
index dbacbface287d..e00ea5cb1e22f 100644
--- a/sys/netinet/in_var.h
+++ b/sys/netinet/in_var.h
@@ -114,6 +114,17 @@ extern	u_long in_ifaddrhmask;			/* mask for hash table */
 #define INADDR_HASH(x) \
 	(&V_in_ifaddrhashtbl[INADDR_HASHVAL(x) & V_in_ifaddrhmask])
 
+extern	struct rwlock in_ifaddr_lock;
+
+#define	IN_IFADDR_LOCK_INIT()	rw_init(&in_ifaddr_lock, "in_ifaddr_lock")
+#define	IN_IFADDR_LOCK_ASSERT()	rw_assert(&in_ifaddr_lock, RA_LOCKED)
+#define	IN_IFADDR_RLOCK()	rw_rlock(&in_ifaddr_lock)
+#define	IN_IFADDR_RLOCK_ASSERT()	rw_assert(&in_ifaddr_lock, RA_RLOCKED)
+#define	IN_IFADDR_RUNLOCK()	rw_runlock(&in_ifaddr_lock)
+#define	IN_IFADDR_WLOCK()	rw_wlock(&in_ifaddr_lock)
+#define	IN_IFADDR_WLOCK_ASSERT()	rw_assert(&in_ifaddr_lock, RA_WLOCKED)
+#define	IN_IFADDR_WUNLOCK()	rw_wunlock(&in_ifaddr_lock)
+
 /*
  * Macro for finding the internet address structure (in_ifaddr)
  * corresponding to one of our IP addresses (in_addr).