net: convert BUG_TRAP to generic WARN_ON

Removes legacy reinvent-the-wheel type thing. The generic
machinery integrates much better to automated debugging aids
such as kerneloops.org (and others), and is unambiguous due to
better naming. Non-intuively BUG_TRAP() is actually equal to
WARN_ON() rather than BUG_ON() though some might actually be
promoted to BUG_ON() but I left that to future.

I could make at least one BUILD_BUG_ON conversion.

Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>

6 files changed, 18 insertions, 18 deletions

diff --git a/net/sched/act_api.c b/net/sched/act_api.c
index 74e662cbb2c5..d308c19aa3f9 100644
--- a/net/sched/act_api.c
+++ b/net/sched/act_api.c
@@ -41,7 +41,7 @@ void tcf_hash_destroy(struct tcf_common *p, struct tcf_hashinfo *hinfo)
                         return;
                 }
         }
-        BUG_TRAP(0);
+        WARN_ON(1);
 }
 EXPORT_SYMBOL(tcf_hash_destroy);
 
diff --git a/net/sched/act_police.c b/net/sched/act_police.c
index 32c3f9d9fb7a..38015b493947 100644
--- a/net/sched/act_police.c
+++ b/net/sched/act_police.c
@@ -116,7 +116,7 @@ static void tcf_police_destroy(struct tcf_police *p)
                         return;
                 }
         }
-        BUG_TRAP(0);
+        WARN_ON(1);
 }
 
 static const struct nla_policy police_policy[TCA_POLICE_MAX + 1] = {
diff --git a/net/sched/cls_u32.c b/net/sched/cls_u32.c
index 527db2559dd2..246f9065ce34 100644
--- a/net/sched/cls_u32.c
+++ b/net/sched/cls_u32.c
@@ -345,7 +345,7 @@ static int u32_delete_key(struct tcf_proto *tp, struct tc_u_knode* key)
                         }
                 }
         }
-        BUG_TRAP(0);
+        WARN_ON(1);
         return 0;
 }
 
@@ -368,7 +368,7 @@ static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
         struct tc_u_common *tp_c = tp->data;
         struct tc_u_hnode **hn;
 
-        BUG_TRAP(!ht->refcnt);
+        WARN_ON(ht->refcnt);
 
         u32_clear_hnode(tp, ht);
 
@@ -380,7 +380,7 @@ static int u32_destroy_hnode(struct tcf_proto *tp, struct tc_u_hnode *ht)
                 }
         }
 
-        BUG_TRAP(0);
+        WARN_ON(1);
         return -ENOENT;
 }
 
@@ -389,7 +389,7 @@ static void u32_destroy(struct tcf_proto *tp)
         struct tc_u_common *tp_c = tp->data;
         struct tc_u_hnode *root_ht = xchg(&tp->root, NULL);
 
-        BUG_TRAP(root_ht != NULL);
+        WARN_ON(root_ht == NULL);
 
         if (root_ht && --root_ht->refcnt == 0)
                 u32_destroy_hnode(tp, root_ht);
@@ -407,7 +407,7 @@ static void u32_destroy(struct tcf_proto *tp)
                 while ((ht = tp_c->hlist) != NULL) {
                         tp_c->hlist = ht->next;
 
-                        BUG_TRAP(ht->refcnt == 0);
+                        WARN_ON(ht->refcnt != 0);
 
                         kfree(ht);
                 }
diff --git a/net/sched/sch_cbq.c b/net/sched/sch_cbq.c
index f1d2f8ec8b4c..14954bf4a683 100644
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1175,7 +1175,7 @@ static void cbq_unlink_class(struct cbq_class *this)
                                 this->tparent->children = NULL;
                 }
         } else {
-                BUG_TRAP(this->sibling == this);
+                WARN_ON(this->sibling != this);
         }
 }
 
@@ -1699,7 +1699,7 @@ static void cbq_destroy_class(struct Qdisc *sch, struct cbq_class *cl)
 {
         struct cbq_sched_data *q = qdisc_priv(sch);
 
-        BUG_TRAP(!cl->filters);
+        WARN_ON(cl->filters);
 
         tcf_destroy_chain(&cl->filter_list);
         qdisc_destroy(cl->q);
diff --git a/net/sched/sch_generic.c b/net/sched/sch_generic.c
index 43abd4d27ea6..fd2a6cadb115 100644
--- a/net/sched/sch_generic.c
+++ b/net/sched/sch_generic.c
@@ -746,5 +746,5 @@ void dev_shutdown(struct net_device *dev)
 {
         netdev_for_each_tx_queue(dev, shutdown_scheduler_queue, &noop_qdisc);
         shutdown_scheduler_queue(dev, &dev->rx_queue, NULL);
-        BUG_TRAP(!timer_pending(&dev->watchdog_timer));
+        WARN_ON(timer_pending(&dev->watchdog_timer));
 }
diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index 30c999c61b01..75a40951c4f2 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -524,7 +524,7 @@ htb_change_class_mode(struct htb_sched *q, struct htb_class *cl, long *diff)
  */
 static inline void htb_activate(struct htb_sched *q, struct htb_class *cl)
 {
-        BUG_TRAP(!cl->level && cl->un.leaf.q && cl->un.leaf.q->q.qlen);
+        WARN_ON(cl->level || !cl->un.leaf.q || !cl->un.leaf.q->q.qlen);
 
         if (!cl->prio_activity) {
                 cl->prio_activity = 1 << (cl->un.leaf.aprio = cl->un.leaf.prio);
@@ -542,7 +542,7 @@ static inline void htb_activate(struct htb_sched *q, struct htb_class *cl)
  */
 static inline void htb_deactivate(struct htb_sched *q, struct htb_class *cl)
 {
-        BUG_TRAP(cl->prio_activity);
+        WARN_ON(!cl->prio_activity);
 
         htb_deactivate_prios(q, cl);
         cl->prio_activity = 0;
@@ -757,7 +757,7 @@ static struct htb_class *htb_lookup_leaf(struct rb_root *tree, int prio,
                 u32 *pid;
         } stk[TC_HTB_MAXDEPTH], *sp = stk;
 
-        BUG_TRAP(tree->rb_node);
+        WARN_ON(!tree->rb_node);
         sp->root = tree->rb_node;
         sp->pptr = pptr;
         sp->pid = pid;
@@ -777,7 +777,7 @@ static struct htb_class *htb_lookup_leaf(struct rb_root *tree, int prio,
                                 *sp->pptr = (*sp->pptr)->rb_left;
                         if (sp > stk) {
                                 sp--;
-                                BUG_TRAP(*sp->pptr);
+                                WARN_ON(!*sp->pptr);
                                 if (!*sp->pptr)
                                         return NULL;
                                 htb_next_rb_node(sp->pptr);
@@ -792,7 +792,7 @@ static struct htb_class *htb_lookup_leaf(struct rb_root *tree, int prio,
                         sp->pid = cl->un.inner.last_ptr_id + prio;
                 }
         }
-        BUG_TRAP(0);
+        WARN_ON(1);
         return NULL;
 }
 
@@ -810,7 +810,7 @@ static struct sk_buff *htb_dequeue_tree(struct htb_sched *q, int prio,
 
         do {
 next:
-                BUG_TRAP(cl);
+                WARN_ON(!cl);
                 if (!cl)
                         return NULL;
 
@@ -1185,7 +1185,7 @@ static void htb_parent_to_leaf(struct htb_sched *q, struct htb_class *cl,
 {
         struct htb_class *parent = cl->parent;
 
-        BUG_TRAP(!cl->level && cl->un.leaf.q && !cl->prio_activity);
+        WARN_ON(cl->level || !cl->un.leaf.q || cl->prio_activity);
 
         if (parent->cmode != HTB_CAN_SEND)
                 htb_safe_rb_erase(&parent->pq_node, q->wait_pq + parent->level);
@@ -1205,7 +1205,7 @@ static void htb_parent_to_leaf(struct htb_sched *q, struct htb_class *cl,
 static void htb_destroy_class(struct Qdisc *sch, struct htb_class *cl)
 {
         if (!cl->level) {
-                BUG_TRAP(cl->un.leaf.q);
+                WARN_ON(!cl->un.leaf.q);
                 qdisc_destroy(cl->un.leaf.q);
         }
         gen_kill_estimator(&cl->bstats, &cl->rate_est);