Remove kernel lock from rtfree(9).

Route timers and route labels protected by corresponding mutexes. `ifa'
uses references counting for protection. rt_mpls_clear() could be called
lockless because this is the last reference of `rt'.

ok bluhm@ kn@

diff --git a/sys/net/route.c b/sys/net/route.c
index 44d661f..d9f59e9 100644 (file)
--- a/sys/net/route.c
+++ b/sys/net/route.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: route.c,v 1.420 2023/04/27 11:11:04 mvs Exp $ */
+/*     $OpenBSD: route.c,v 1.421 2023/04/27 14:41:09 mvs Exp $ */
 /*     $NetBSD: route.c,v 1.14 1996/02/13 22:00:46 christos Exp $      */
 
 /*
@@ -507,7 +507,6 @@ rtfree(struct rtentry *rt)
        KASSERT(!RT_ROOT(rt));
        atomic_dec_int(&rttrash);
 
-       KERNEL_LOCK();
        rt_timer_remove_all(rt);
        ifafree(rt->rt_ifa);
        rtlabel_unref(rt->rt_labelid);
@@ -516,7 +515,6 @@ rtfree(struct rtentry *rt)
 #endif
        free(rt->rt_gateway, M_RTABLE, ROUNDUP(rt->rt_gateway->sa_len));
        free(rt_key(rt), M_RTABLE, rt_key(rt)->sa_len);
-       KERNEL_UNLOCK();
 
        pool_put(&rtentry_pool, rt);
 }