7378 exported_lock held during nfs4 compound processing

*** 637,647 ****
                           * Check if this exportroot is a VROOT dir.  If so,
                           * then attach the pseudonodes.  If not, then
                           * continue .. traversal until we hit a VROOT
                           * export (pseudo or real).
                           */
!                         exi = checkexport4(&vp->v_vfsp->vfs_fsid, &fid, vp);
                          if (exi != NULL && vp->v_flag & VROOT) {
                                  /*
                                   * Found an export info
                                   *
                                   * Extend the list of visible
--- 637,648 ----
                           * Check if this exportroot is a VROOT dir.  If so,
                           * then attach the pseudonodes.  If not, then
                           * continue .. traversal until we hit a VROOT
                           * export (pseudo or real).
                           */
!                         exi = checkexport_nohold(&vp->v_vfsp->vfs_fsid, &fid,
!                             vp);
                          if (exi != NULL && vp->v_flag & VROOT) {
                                  /*
                                   * Found an export info
                                   *
                                   * Extend the list of visible