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

*** 918,928 ****
          ufs_thread_exit(&ufsvfsp->vfs_delete);
  
          vfs_lock_wait(ufsvfsp->vfs_vfs);
          ulp = &ufsvfsp->vfs_ulockfs;
          mutex_enter(&ulp->ul_lock);
!         atomic_add_long(&ufs_quiesce_pend, 1);
          (void) ufs_quiesce(ulp);
  
          (void) ufs_flush(ufsvfsp->vfs_vfs);
  
          TRANS_MATA_UMOUNT(ufsvfsp);
--- 918,928 ----
          ufs_thread_exit(&ufsvfsp->vfs_delete);
  
          vfs_lock_wait(ufsvfsp->vfs_vfs);
          ulp = &ufsvfsp->vfs_ulockfs;
          mutex_enter(&ulp->ul_lock);
!         atomic_inc_ulong(&ufs_quiesce_pend);
          (void) ufs_quiesce(ulp);
  
          (void) ufs_flush(ufsvfsp->vfs_vfs);
  
          TRANS_MATA_UMOUNT(ufsvfsp);
*** 937,947 ****
           */
          mutex_enter(&ufs_scan_lock);
          (void) lufs_unsnarf(ufsvfsp);
          mutex_exit(&ufs_scan_lock);
  
!         atomic_add_long(&ufs_quiesce_pend, -1);
          mutex_exit(&ulp->ul_lock);
          vfs_setmntopt(ufsvfsp->vfs_vfs, MNTOPT_NOLOGGING, NULL, 0);
          vfs_unlock(ufsvfsp->vfs_vfs);
  
          fs->fs_rolled = FS_ALL_ROLLED;
--- 937,947 ----
           */
          mutex_enter(&ufs_scan_lock);
          (void) lufs_unsnarf(ufsvfsp);
          mutex_exit(&ufs_scan_lock);
  
!         atomic_dec_ulong(&ufs_quiesce_pend);
          mutex_exit(&ulp->ul_lock);
          vfs_setmntopt(ufsvfsp->vfs_vfs, MNTOPT_NOLOGGING, NULL, 0);
          vfs_unlock(ufsvfsp->vfs_vfs);
  
          fs->fs_rolled = FS_ALL_ROLLED;