NFSD_MDS_PR_FENCED
__xa_clear_mark(xa, device, NFSD_MDS_PR_FENCED);
skip = xa_get_mark(xa, device, NFSD_MDS_PR_FENCED);
__xa_set_mark(xa, device, NFSD_MDS_PR_FENCED);
xa_clear_mark(&clp->cl_dev_fences, device, NFSD_MDS_PR_FENCED);