5042 stop using deprecated atomic functions

*** 2771,2782 ****
                                   */
                                  if (new > LGRP_LOADAVG_MAX)
                                          new = LGRP_LOADAVG_MAX;
                                  else if (new < 0)
                                          new = 0;
!                         } while (cas32((lgrp_load_t *)&lpl->lpl_loadavg, old,
!                             new) != old);
                  } else {
                          /*
                           * We're supposed to update the load, but not age it.
                           * This option is used to update the load (which either
                           * has already been aged in this 1/10 sec. interval or
--- 2771,2782 ----
                                   */
                                  if (new > LGRP_LOADAVG_MAX)
                                          new = LGRP_LOADAVG_MAX;
                                  else if (new < 0)
                                          new = 0;
!                         } while (atomic_cas_32((lgrp_load_t *)&lpl->lpl_loadavg,
!                             old, new) != old);
                  } else {
                          /*
                           * We're supposed to update the load, but not age it.
                           * This option is used to update the load (which either
                           * has already been aged in this 1/10 sec. interval or
*** 2790,2801 ****
                                   * Check for overflow
                                   * Underflow not possible here
                                   */
                                  if (new < old)
                                          new = LGRP_LOADAVG_MAX;
!                         } while (cas32((lgrp_load_t *)&lpl->lpl_loadavg, old,
!                             new) != old);
                  }
  
                  /*
                   * Do the same for this lpl's parent
                   */
--- 2790,2801 ----
                                   * Check for overflow
                                   * Underflow not possible here
                                   */
                                  if (new < old)
                                          new = LGRP_LOADAVG_MAX;
!                         } while (atomic_cas_32((lgrp_load_t *)&lpl->lpl_loadavg,
!                             old, new) != old);
                  }
  
                  /*
                   * Do the same for this lpl's parent
                   */
*** 3352,3362 ****
                                                   * added in the anticipatory
                                                   * load
                                                   */
                                                  new = 0;
                                          }
!                                 } while (cas32(
                                      (lgrp_load_t *)&lpl->lpl_loadavg, old,
                                      new) != old);
  
                                  lpl = lpl->lpl_parent;
                                  if (lpl == NULL)
--- 3352,3362 ----
                                                   * added in the anticipatory
                                                   * load
                                                   */
                                                  new = 0;
                                          }
!                                 } while (atomic_cas_32(
                                      (lgrp_load_t *)&lpl->lpl_loadavg, old,
                                      new) != old);
  
                                  lpl = lpl->lpl_parent;
                                  if (lpl == NULL)
*** 3421,3432 ****
                                   * Check for overflow
                                   * Underflow not possible here
                                   */
                                  if (new < old)
                                          new = UINT32_MAX;
!                         } while (cas32((lgrp_load_t *)&lpl->lpl_loadavg, old,
!                             new) != old);
  
                          lpl = lpl->lpl_parent;
                          if (lpl == NULL)
                                  break;
                  }
--- 3421,3432 ----
                                   * Check for overflow
                                   * Underflow not possible here
                                   */
                                  if (new < old)
                                          new = UINT32_MAX;
!                         } while (atomic_cas_32((lgrp_load_t *)&lpl->lpl_loadavg,
!                             old, new) != old);
  
                          lpl = lpl->lpl_parent;
                          if (lpl == NULL)
                                  break;
                  }