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fib_trie: Use empty_children instead of counting empty nodes in stats collection

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It doesn't make much sense to count the pointers ourselves when
empty_children already has a count for the number of NULL pointers stored
in the tnode.  As such save ourselves the cycles and just use
empty_children.

Signed-off-by: Alexander Duyck <alexander.h.duyck@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexander Duyck 2015-01-22 15:51:33 -08:00 committed by David S. Miller
parent 95f60ea3e9
commit 30cfe7c9c8
1 changed files with 1 additions and 7 deletions
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8
net/ipv4/fib_trie.c
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@ -1954,16 +1954,10 @@ static void trie_collect_stats(struct trie *t, struct trie_stat *s)
hlist_for_each_entry_rcu(li, &n->list, hlist)
++s->prefixes;
} else {
unsigned long i;
s->tnodes++;
if (n->bits < MAX_STAT_DEPTH)
s->nodesizes[n->bits]++;
for (i = tnode_child_length(n); i--;) {
if (!rcu_access_pointer(n->child[i]))
s->nullpointers++;
}
s->nullpointers += n->empty_children;
}
}
rcu_read_unlock();