static struct nrs_tbf_client *                                                  
nrs_tbf_cli_findadd(struct nrs_tbf_head *head,                                  
                    struct nrs_tbf_client *cli)                                 
{                                                                               
        struct nrs_tbf_client *cli2 = NULL;                                     
                                                                                
try_again:                                                                      
        rcu_read_lock();                                                        
        cli2 = rhashtable_lookup_get_insert_fast(&head->th_cli_rhash,           
                                                 &cli->tc_rhash,                
                                                 head->th_rhash_params);        
        if (IS_ERR(cli2))                                                       
                goto out;                                                       
                                                                                
        if (cli2 && !refcount_inc_not_zero(&cli2->tc_ref)) {                    
                cli2 = nrs_tbf_lru_tryhit(head, cli); ==> "cli" -> "cli2"                          
                if (!cli2) {                                                    
                        /* lost race -> retry */                                
                        rcu_read_unlock();                                      
                        schedule();                                             
                        goto try_again;                                         
                }                                                               
        }