From 1f48c677b57a5904d8da8f832f04e5037fb047bb Mon Sep 17 00:00:00 2001
From: jhb <jhb@FreeBSD.org>
Date: Mon, 30 Nov 2009 21:25:57 +0000
Subject: Remove if_timer/if_watchdog now that they are no longer used.  The
 space used by if_timer is reserved for expanding if_index to an int in the
 future.

Reviewed by:	rwatson, brooks
---
 sys/net/if.c | 66 ------------------------------------------------------------
 1 file changed, 66 deletions(-)

(limited to 'sys/net/if.c')

diff --git a/sys/net/if.c b/sys/net/if.c
index 55de666..003f3ea 100644
--- a/sys/net/if.c
+++ b/sys/net/if.c
@@ -96,8 +96,6 @@ struct ifindex_entry {
 	struct  ifnet *ife_ifnet;
 };
 
-static int slowtimo_started;
-
 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers");
 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management");
 
@@ -125,10 +123,8 @@ static int	ifconf(u_long, caddr_t);
 static void	if_freemulti(struct ifmultiaddr *);
 static void	if_init(void *);
 static void	if_grow(void);
-static void	if_check(void *);
 static void	if_route(struct ifnet *, int flag, int fam);
 static int	if_setflag(struct ifnet *, int, int, int *, int);
-static void	if_slowtimo(void *);
 static int	if_transmit(struct ifnet *ifp, struct mbuf *m);
 static void	if_unroute(struct ifnet *, int flag, int fam);
 static void	link_rtrequest(int, struct rtentry *, struct rt_addrinfo *);
@@ -185,11 +181,6 @@ struct sx ifnet_sxlock;
 static	if_com_alloc_t *if_com_alloc[256];
 static	if_com_free_t *if_com_free[256];
 
-/*
- * System initialization
- */
-SYSINIT(interface_check, SI_SUB_PROTO_IF, SI_ORDER_FIRST, if_check, NULL);
-
 MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals");
 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address");
 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address");
@@ -375,18 +366,6 @@ if_grow(void)
 	V_ifindex_table = e;
 }
 
-static void
-if_check(void *dummy __unused)
-{
-
-	/*
-	 * If at least one interface added during boot uses
-	 * if_watchdog then start the timer.
-	 */
-	if (slowtimo_started)
-		if_slowtimo(0);
-}
-
 /*
  * Allocate a struct ifnet and an index for an interface.  A layer 2
  * common structure will also be allocated if an allocation routine is
@@ -670,18 +649,6 @@ if_attach_internal(struct ifnet *ifp, int vmove)
 
 	/* Announce the interface. */
 	rt_ifannouncemsg(ifp, IFAN_ARRIVAL);
-
-	if (!vmove && ifp->if_watchdog != NULL) {
-		if_printf(ifp,
-		    "WARNING: using obsoleted if_watchdog interface\n");
-
-		/*
-		 * Note that we need if_slowtimo().  If this happens after
-		 * boot, then call if_slowtimo() directly.
-		 */
-		if (atomic_cmpset_int(&slowtimo_started, 0, 1) && !cold)
-			if_slowtimo(0);
-	}
 }
 
 static void
@@ -1973,39 +1940,6 @@ if_qflush(struct ifnet *ifp)
 }
 
 /*
- * Handle interface watchdog timer routines.  Called
- * from softclock, we decrement timers (if set) and
- * call the appropriate interface routine on expiration.
- *
- * XXXRW: Note that because timeouts run with Giant, if_watchdog() is called
- * holding Giant.
- */
-static void
-if_slowtimo(void *arg)
-{
-	VNET_ITERATOR_DECL(vnet_iter);
-	struct ifnet *ifp;
-	int s = splimp();
-
-	VNET_LIST_RLOCK_NOSLEEP();
-	IFNET_RLOCK_NOSLEEP();
-	VNET_FOREACH(vnet_iter) {
-		CURVNET_SET(vnet_iter);
-		TAILQ_FOREACH(ifp, &V_ifnet, if_link) {
-			if (ifp->if_timer == 0 || --ifp->if_timer)
-				continue;
-			if (ifp->if_watchdog)
-				(*ifp->if_watchdog)(ifp);
-		}
-		CURVNET_RESTORE();
-	}
-	IFNET_RUNLOCK_NOSLEEP();
-	VNET_LIST_RUNLOCK_NOSLEEP();
-	splx(s);
-	timeout(if_slowtimo, (void *)0, hz / IFNET_SLOWHZ);
-}
-
-/*
  * Map interface name to interface structure pointer, with or without
  * returning a reference.
  */
-- 
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