pkt_sched: sch_htb: Optimize WARN_ONs in htb_dequeue_tree() etc.

We can skip WARN_ON() in htb_dequeue_tree() because there should be
always a similar warning from htb_lookup_leaf() earlier.

The first WARN_ON() in in htb_lookup_leaf() is changed to BUG_ON()
because most likly this should end with oops anyway.

Signed-off-by: Jarek Poplawski <jarkao2@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 5 insertions, 5 deletions

diff --git a/net/sched/sch_htb.c b/net/sched/sch_htb.c
index b820a0ae7355..5070643ce534 100644
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -726,7 +726,7 @@ static struct htb_class *htb_lookup_leaf(struct rb_root *tree, int prio,
                 u32 *pid;
         } stk[TC_HTB_MAXDEPTH], *sp = stk;
 
-        WARN_ON(!tree->rb_node);
+        BUG_ON(!tree->rb_node);
         sp->root = tree->rb_node;
         sp->pptr = pptr;
         sp->pid = pid;
@@ -746,9 +746,10 @@ static struct htb_class *htb_lookup_leaf(struct rb_root *tree, int prio,
                                 *sp->pptr = (*sp->pptr)->rb_left;
                         if (sp > stk) {
                                 sp--;
-                                WARN_ON(!*sp->pptr);
-                                if (!*sp->pptr)
+                                if (!*sp->pptr) {
+                                        WARN_ON(1);
                                         return NULL;
+                                }
                                 htb_next_rb_node(sp->pptr);
                         }
                 } else {
@@ -779,8 +780,7 @@ static struct sk_buff *htb_dequeue_tree(struct htb_sched *q, int prio,
 
         do {
 next:
-                WARN_ON(!cl);
-                if (!cl)
+                if (unlikely(!cl))
                         return NULL;
 
                 /* class can be empty - it is unlikely but can be true if leaf