NFS_LSEG_ROC
if (test_bit(NFS_LSEG_ROC, &old->pls_flags))
set_bit(NFS_LSEG_ROC, &new->pls_flags);
if (!test_and_clear_bit(NFS_LSEG_ROC, &lseg->pls_flags))
set_bit(NFS_LSEG_ROC, &lseg->pls_flags);
clear_bit(NFS_LSEG_ROC, &lseg->pls_flags);