gfs2_tune_get
gfs2_tune_get(sdp, gt_new_files_jdata))
t = gfs2_tune_get(sdp, gt_logd_secs) * HZ;
u32 max_ra = gfs2_tune_get(sdp, gt_max_readahead) >>
gfs2_tune_get(sdp, gt_quota_warn_period)
quantum = gfs2_tune_get(sdp, gt_statfs_quantum);
quantum = gfs2_tune_get(sdp, gt_quota_quantum);
if (gfs2_tune_get(sdp, gt_statfs_slow))
timeout = gfs2_tune_get(sdp, gt_withdraw_helper_timeout) * HZ;
gfs2_tune_get(sdp, gt_complain_secs) * HZ))