7378 exported_lock held during nfs4 compound processing

*** 1643,1653 ****
                          cr = crget();
                          xprt->xp_cred = cr;
                  }
  #endif
  
!                 exi = checkexport(fsid, xfid);
  
                  if (exi != NULL) {
                          publicfh_ok = PUBLICFH_CHECK(disp, exi, fsid, xfid);
  
                          /*
--- 1643,1653 ----
                          cr = crget();
                          xprt->xp_cred = cr;
                  }
  #endif
  
!                 exi = checkexport(fsid, xfid, NULL);
  
                  if (exi != NULL) {
                          publicfh_ok = PUBLICFH_CHECK(disp, exi, fsid, xfid);
  
                          /*