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

*** 21,32 ****
  /*
   * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
   * Use is subject to license terms.
   */
  
- #pragma ident   "%Z%%M% %I%     %E% SMI"
- 
  /*
   * The idea behind composition-based stacked filesystems is to add a
   * vnode to the stack of vnodes for each mount. These vnodes have their
   * own set of mount options and filesystem-specific functions, so they
   * can modify data or operations before they are passed along. Such a
--- 21,30 ----
*** 287,297 ****
                                  VN_RELE(vp);
                                  goto found_lnode;
                          }
                          lp = tlp;
                  }
!                 atomic_add_32(&li->li_refct, 1);
                  vfsp = makelfsnode(vp->v_vfsp, li);
                  lp->lo_vnode = nvp;
                  VN_SET_VFS_TYPE_DEV(nvp, vfsp, vp->v_type, vp->v_rdev);
                  nvp->v_flag |= (vp->v_flag & (VNOMOUNT|VNOMAP|VDIROPEN));
                  vn_setops(nvp, lo_vnodeops);
--- 285,295 ----
                                  VN_RELE(vp);
                                  goto found_lnode;
                          }
                          lp = tlp;
                  }
!                 atomic_inc_32(&li->li_refct);
                  vfsp = makelfsnode(vp->v_vfsp, li);
                  lp->lo_vnode = nvp;
                  VN_SET_VFS_TYPE_DEV(nvp, vfsp, vp->v_type, vp->v_rdev);
                  nvp->v_flag |= (vp->v_flag & (VNOMOUNT|VNOMAP|VDIROPEN));
                  vn_setops(nvp, lo_vnodeops);
*** 630,640 ****
  {
          vfs_t *vfsp = &lfs->lfs_vfs;
  
          ASSERT(MUTEX_HELD(&li->li_lfslock));
          ASSERT(vfsp->vfs_count > 1);
!         if (atomic_add_32_nv(&vfsp->vfs_count, -1) == 1)
                  freelfsnode(lfs, li);
  }
  
  /*
   * Remove a lnode from the table
--- 628,638 ----
  {
          vfs_t *vfsp = &lfs->lfs_vfs;
  
          ASSERT(MUTEX_HELD(&li->li_lfslock));
          ASSERT(vfsp->vfs_count > 1);
!         if (atomic_dec_32_nv(&vfsp->vfs_count) == 1)
                  freelfsnode(lfs, li);
  }
  
  /*
   * Remove a lnode from the table
*** 670,680 ****
                  if (lt == lp) {
  #ifdef LODEBUG
                          lo_dprint(4, "freeing %p, vfsp %p\n",
                              vp, vp->v_vfsp);
  #endif
!                         atomic_add_32(&li->li_refct, -1);
                          vfsp = vp->v_vfsp;
                          vn_invalid(vp);
                          if (vfsp != li->li_mountvfs) {
                                  mutex_enter(&li->li_lfslock);
                                  /*
--- 668,678 ----
                  if (lt == lp) {
  #ifdef LODEBUG
                          lo_dprint(4, "freeing %p, vfsp %p\n",
                              vp, vp->v_vfsp);
  #endif
!                         atomic_dec_32(&li->li_refct);
                          vfsp = vp->v_vfsp;
                          vn_invalid(vp);
                          if (vfsp != li->li_mountvfs) {
                                  mutex_enter(&li->li_lfslock);
                                  /*