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

*** 1412,1431 ****
           * will force the memscrubber to sleep, allowing the DR callback
           * thread to acquire memscrub_lock in new_memscrub(). The use of
           * atomic_add_32() allows concurrent memory DR operations to use the
           * callbacks safely.
           */
!         atomic_add_32(&pause_memscrub, 1);
          ASSERT(pause_memscrub != 0);
  
          /*
           * "Don't care" if we are not scrubbing new memory.
           */
          (void) new_memscrub(0);         /* retain page retire list */
  
          /* Restore the pause setting. */
!         atomic_add_32(&pause_memscrub, -1);
  }
  
  /*ARGSUSED*/
  static int
  memscrub_mem_config_pre_del(
--- 1412,1431 ----
           * will force the memscrubber to sleep, allowing the DR callback
           * thread to acquire memscrub_lock in new_memscrub(). The use of
           * atomic_add_32() allows concurrent memory DR operations to use the
           * callbacks safely.
           */
!         atomic_inc_32(&pause_memscrub);
          ASSERT(pause_memscrub != 0);
  
          /*
           * "Don't care" if we are not scrubbing new memory.
           */
          (void) new_memscrub(0);         /* retain page retire list */
  
          /* Restore the pause setting. */
!         atomic_dec_32(&pause_memscrub);
  }
  
  /*ARGSUSED*/
  static int
  memscrub_mem_config_pre_del(
*** 1448,1469 ****
           * will force the memscrubber to sleep, allowing the DR callback
           * thread to acquire memscrub_lock in new_memscrub(). The use of
           * atomic_add_32() allows concurrent memory DR operations to use the
           * callbacks safely.
           */
!         atomic_add_32(&pause_memscrub, 1);
          ASSERT(pause_memscrub != 0);
  
          /*
           * Must stop scrubbing deleted memory as it may be disconnected.
           */
          if (new_memscrub(1)) {  /* update page retire list */
                  disable_memscrub = 1;
          }
  
          /* Restore the pause setting. */
!         atomic_add_32(&pause_memscrub, -1);
  }
  
  static kphysm_setup_vector_t memscrub_mem_config_vec = {
          KPHYSM_SETUP_VECTOR_VERSION,
          memscrub_mem_config_post_add,
--- 1448,1469 ----
           * will force the memscrubber to sleep, allowing the DR callback
           * thread to acquire memscrub_lock in new_memscrub(). The use of
           * atomic_add_32() allows concurrent memory DR operations to use the
           * callbacks safely.
           */
!         atomic_inc_32(&pause_memscrub);
          ASSERT(pause_memscrub != 0);
  
          /*
           * Must stop scrubbing deleted memory as it may be disconnected.
           */
          if (new_memscrub(1)) {  /* update page retire list */
                  disable_memscrub = 1;
          }
  
          /* Restore the pause setting. */
!         atomic_dec_32(&pause_memscrub);
  }
  
  static kphysm_setup_vector_t memscrub_mem_config_vec = {
          KPHYSM_SETUP_VECTOR_VERSION,
          memscrub_mem_config_post_add,