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

*** 595,605 ****
          /*
           * Remove pool association, and block if requested by pool_do_bind.
           */
          mutex_enter(&p->p_lock);
          ASSERT(p->p_pool->pool_ref > 0);
!         atomic_add_32(&p->p_pool->pool_ref, -1);
          p->p_pool = pool_default;
          /*
           * Now that our address space has been freed and all other threads
           * in this process have exited, set the PEXITED pool flag.  This
           * tells the pools subsystems to ignore this process if it was
--- 595,605 ----
          /*
           * Remove pool association, and block if requested by pool_do_bind.
           */
          mutex_enter(&p->p_lock);
          ASSERT(p->p_pool->pool_ref > 0);
!         atomic_dec_32(&p->p_pool->pool_ref);
          p->p_pool = pool_default;
          /*
           * Now that our address space has been freed and all other threads
           * in this process have exited, set the PEXITED pool flag.  This
           * tells the pools subsystems to ignore this process if it was