The RN_DEBUG code is broken since rev 1.1
I see no reason to keep it any longer and removing the code makes the
result easier to read.

OK?
-- 
:wq Claudio

Index: net/radix.c
===================================================================
RCS file: /cvs/src/sys/net/radix.c,v
retrieving revision 1.38
diff -u -p -r1.38 radix.c
--- net/radix.c 21 Jan 2014 23:42:44 -0000      1.38
+++ net/radix.c 22 Jan 2014 09:58:42 -0000
@@ -303,13 +303,6 @@ on1:
        return NULL;
 }
 
-#ifdef RN_DEBUG
-int    rn_nodenum;
-struct radix_node *rn_clist;
-int    rn_saveinfo;
-int    rn_debug =  1;
-#endif
-
 struct radix_node *
 rn_newpair(void *v, int b, struct radix_node nodes[2])
 {
@@ -322,13 +315,6 @@ rn_newpair(void *v, int b, struct radix_
        tt->rn_key = v;
        tt->rn_p = t;
        tt->rn_flags = t->rn_flags = RNF_ACTIVE;
-#ifdef RN_DEBUG
-       tt->rn_info = rn_nodenum++;
-       t->rn_info = rn_nodenum++;
-       tt->rn_twin = t;
-       tt->rn_ybro = rn_clist;
-       rn_clist = tt;
-#endif
        return t;
 }
 
@@ -376,10 +362,6 @@ on1:
                else
                        x = x->rn_l;
        } while (b > (unsigned int) x->rn_b); /* x->rn_b < b && x->rn_b >= 0 */
-#ifdef RN_DEBUG
-       if (rn_debug)
-               log(LOG_DEBUG, "rn_insert: Going In:\n"), traverse(p);
-#endif
        t = rn_newpair(v_arg, b, nodes);
        tt = t->rn_l;
        if ((cp[p->rn_off] & p->rn_bmask) == 0)
@@ -394,10 +376,6 @@ on1:
                t->rn_r = tt;
                t->rn_l = x;
        }
-#ifdef RN_DEBUG
-       if (rn_debug)
-               log(LOG_DEBUG, "rn_insert: Coming Out:\n"), traverse(p);
-#endif
     }
        return (tt);
 }
@@ -640,14 +618,6 @@ rn_addroute(void *v_arg, void *n_arg, st
                        if (tt->rn_dupedkey)
                                tt->rn_dupedkey->rn_p = tt;
                }
-#ifdef RN_DEBUG
-               t=tt+1;
-               tt->rn_info = rn_nodenum++;
-               t->rn_info = rn_nodenum++;
-               tt->rn_twin = t;
-               tt->rn_ybro = rn_clist;
-               rn_clist = tt;
-#endif
                tt->rn_key = (caddr_t) v;
                tt->rn_b = -1;
                tt->rn_flags = RNF_ACTIVE;
@@ -851,12 +821,6 @@ on1:
         */
        if (tt->rn_flags & RNF_ROOT)
                return (0);
-#ifdef RN_DEBUG
-       /* Get us out of the creation list */
-       for (t = rn_clist; t && t->rn_ybro != tt; t = t->rn_ybro)
-               ;
-       if (t) t->rn_ybro = tt->rn_ybro;
-#endif
        t = tt->rn_p;
        dupedkey = saved_tt->rn_dupedkey;
        if (dupedkey) {
@@ -879,15 +843,8 @@ on1:
                }
                t = tt + 1;
                if  (t->rn_flags & RNF_ACTIVE) {
-#ifndef RN_DEBUG
-                       *++x = *t;
-                       p = t->rn_p;
-#else
-                       b = t->rn_info;
                        *++x = *t;
-                       t->rn_info = b;
                        p = t->rn_p;
-#endif
                        if (p->rn_l == t)
                                p->rn_l = x;
                        else
@@ -944,13 +901,7 @@ on1:
         */
        x = tt + 1;
        if (t != x) {
-#ifndef RN_DEBUG
-               *t = *x;
-#else
-               b = t->rn_info;
                *t = *x;
-               t->rn_info = b;
-#endif
                t->rn_l->rn_p = t;
                t->rn_r->rn_p = t;
                p = x->rn_p;
Index: net/radix.h
===================================================================
RCS file: /cvs/src/sys/net/radix.h,v
retrieving revision 1.23
diff -u -p -r1.23 radix.h
--- net/radix.h 19 Jan 2014 09:52:25 -0000      1.23
+++ net/radix.h 22 Jan 2014 09:59:32 -0000
@@ -60,11 +60,6 @@ struct radix_node {
                        struct  radix_node *rn_R;/* progeny */
                } rn_node;
        } rn_u;
-#ifdef RN_DEBUG
-       int rn_info;
-       struct radix_node *rn_twin;
-       struct radix_node *rn_ybro;
-#endif
 };
 
 #define rn_dupedkey rn_u.rn_leaf.rn_Dupedkey
Index: net/radix_mpath.c
===================================================================
RCS file: /cvs/src/sys/net/radix_mpath.c,v
retrieving revision 1.21
diff -u -p -r1.21 radix_mpath.c
--- net/radix_mpath.c   20 Oct 2013 16:17:36 -0000      1.21
+++ net/radix_mpath.c   22 Jan 2014 09:58:54 -0000
@@ -60,9 +60,6 @@ u_int32_t rn_mpath_hash(struct route *, 
  * give some jitter to hash, to avoid synchronization between routers
  */
 static u_int32_t hashjitter;
-#ifdef RN_DEBUG
-extern struct radix_node       *rn_clist;
-#endif
 
 int
 rn_mpath_capable(struct radix_node_head *rnh)
@@ -208,16 +205,6 @@ rn_mpath_reprio(struct radix_node *rn, i
                if (rn->rn_dupedkey)
                        rn->rn_dupedkey->rn_p = rn;
        }
-
-#ifdef RN_DEBUG
-       /* readd at head of creation list */
-       for (t = rn_clist; t && t->rn_ybro != rn; t = t->rn_ybro)
-               ;
-       if (t)
-               t->rn_ybro = rn->rn_ybro;
-       rn->rn_ybro = rn_clist;
-       rn_clist = rn;
-#endif
 
        if (rn->rn_mklist && rn->rn_flags & RNF_NORMAL) {
                /* the rn_mklist needs to be fixed if the best route changed */

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