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

*** 234,244 ****
          tmp->nse_port = port;
          tmp->nse_nsh_lock = &ilbs->ilbs_nat_src[idx].nsh_lock;
          tmp->nse_refcnt = 1;
  
          (void) snprintf(arena_name, ARENA_NAMESZ, "ilb_ns_%u",
!             atomic_add_32_nv(&ilb_nat_src_instance, 1));
          if ((tmp->nse_port_arena = vmem_create(arena_name,
              (void *)NAT_PORT_START, NAT_PORT_SIZE, 1, NULL, NULL, NULL, 1,
              VM_SLEEP | VMC_IDENTIFIER)) == NULL) {
                  kmem_free(tmp, sizeof (*tmp));
                  return (NULL);
--- 234,244 ----
          tmp->nse_port = port;
          tmp->nse_nsh_lock = &ilbs->ilbs_nat_src[idx].nsh_lock;
          tmp->nse_refcnt = 1;
  
          (void) snprintf(arena_name, ARENA_NAMESZ, "ilb_ns_%u",
!             atomic_inc_32_nv(&ilb_nat_src_instance));
          if ((tmp->nse_port_arena = vmem_create(arena_name,
              (void *)NAT_PORT_START, NAT_PORT_SIZE, 1, NULL, NULL, NULL, 1,
              VM_SLEEP | VMC_IDENTIFIER)) == NULL) {
                  kmem_free(tmp, sizeof (*tmp));
                  return (NULL);