5045 use atomic_{inc,dec}_* instead of atomic_add_*

@@ -1424,14 +1424,14 @@
          */
         if (listener->tcp_listen_cnt != NULL) {
                 tcp_listen_cnt_t *tlc = listener->tcp_listen_cnt;
                 int64_t now;
 
-                if (atomic_add_32_nv(&tlc->tlc_cnt, 1) > tlc->tlc_max + 1) {
+                if (atomic_inc_32_nv(&tlc->tlc_cnt) > tlc->tlc_max + 1) {
                         mutex_exit(&listener->tcp_eager_lock);
                         now = ddi_get_lbolt64();
-                        atomic_add_32(&tlc->tlc_cnt, -1);
+                        atomic_dec_32(&tlc->tlc_cnt);
                         TCP_STAT(tcps, tcp_listen_cnt_drop);
                         tlc->tlc_drop++;
                         if (now - tlc->tlc_report_time >
                             MSEC_TO_TICK(TCP_TLC_REPORT_INTERVAL)) {
                                 zcmn_err(lconnp->conn_zoneid, CE_WARN,

@@ -1869,11 +1869,11 @@
 error3:
         CONN_DEC_REF(econnp);
 error2:
         freemsg(mp);
         if (tlc_set)
-                atomic_add_32(&listener->tcp_listen_cnt->tlc_cnt, -1);
+                atomic_dec_32(&listener->tcp_listen_cnt->tlc_cnt);
 }
 
 /*
  * In an ideal case of vertical partition in NUMA architecture, its
  * beneficial to have the listener and all the incoming connections