XXXX pass in cpu_pause_func via pause_cpus

*** 353,363 ****
  
          /*
           * We're changing around the hierarchy, which is actively traversed
           * by the dispatcher. Pause CPUS to ensure exclusivity.
           */
!         pause_cpus(NULL);
  
          /*
           * If necessary, update the parent's sibling set, replacing parent
           * with PG.
           */
--- 353,363 ----
  
          /*
           * We're changing around the hierarchy, which is actively traversed
           * by the dispatcher. Pause CPUS to ensure exclusivity.
           */
!         pause_cpus(NULL, NULL);
  
          /*
           * If necessary, update the parent's sibling set, replacing parent
           * with PG.
           */
*** 1553,1563 ****
  
          /*
           * We're operating on the PG hierarchy. Pause CPUs to ensure
           * exclusivity with respect to the dispatcher.
           */
!         pause_cpus(NULL);
  
          /*
           * Prune all PG instances of the hardware sharing relationship
           * represented by pg.
           */
--- 1553,1563 ----
  
          /*
           * We're operating on the PG hierarchy. Pause CPUs to ensure
           * exclusivity with respect to the dispatcher.
           */
!         pause_cpus(NULL, NULL);
  
          /*
           * Prune all PG instances of the hardware sharing relationship
           * represented by pg.
           */
*** 1673,1683 ****
  {
          cpu_t           *cpu;
  
          ASSERT(MUTEX_HELD(&cpu_lock));
  
!         pause_cpus(NULL);
          cpu = cpu_list;
  
          do {
                  if (cpu->cpu_pg)
                          group_empty(&cpu->cpu_pg->cmt_pgs);
--- 1673,1683 ----
  {
          cpu_t           *cpu;
  
          ASSERT(MUTEX_HELD(&cpu_lock));
  
!         pause_cpus(NULL, NULL);
          cpu = cpu_list;
  
          do {
                  if (cpu->cpu_pg)
                          group_empty(&cpu->cpu_pg->cmt_pgs);