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

@@ -272,11 +272,11 @@
                                 cp->p_psibling->p_sibling = cp->p_sibling;
                         mutex_enter(&cp->p_lock);
                         tk = cp->p_task;
                         task_detach(cp);
                         ASSERT(cp->p_pool->pool_ref > 0);
-                        atomic_add_32(&cp->p_pool->pool_ref, -1);
+                        atomic_dec_32(&cp->p_pool->pool_ref);
                         mutex_exit(&cp->p_lock);
                         pid_exit(cp, tk);
                         mutex_exit(&pidlock);
                         task_rele(tk);
 

@@ -626,11 +626,11 @@
          */
         mutex_enter(&cp->p_lock);
         tk = cp->p_task;
         task_detach(cp);
         ASSERT(cp->p_pool->pool_ref > 0);
-        atomic_add_32(&cp->p_pool->pool_ref, -1);
+        atomic_dec_32(&cp->p_pool->pool_ref);
         mutex_exit(&cp->p_lock);
 
         orphpp = &p->p_orphan;
         while (*orphpp != cp)
                 orphpp = &(*orphpp)->p_nextorph;

@@ -1126,11 +1126,11 @@
                 cp->p_pool = pool_default;
                 cp->p_flag |= SSYS;
         } else {
                 cp->p_pool = pp->p_pool;
         }
-        atomic_add_32(&cp->p_pool->pool_ref, 1);
+        atomic_inc_32(&cp->p_pool->pool_ref);
         mutex_exit(&pp->p_lock);
 
         /*
          * Add the child process to the current task.  Kernel processes
          * are always attached to task0.