return tn->child[i]; 
return rcu_dereference(tn->child[i]); 
static inline struct node *tnode_get_child(struct tnode *tn, int i){	BUG_ON(i >= 1 << tn->bits);	return tn->child[i];}
10457	/local/tlutelli/issta_data/temp/c/2005_temp/2005/10457/2373ce1ca04dd46bf2b8b0f9a799eb2a90da92fb/fib_trie.c/buggy/net/ipv4/fib_trie.c