log_write_header  647 fs/gfs2/log.c  	log_write_header(sdp, 0, 0);
log_write_header  751 fs/gfs2/log.c  		log_write_header(sdp, 0, PULL);
log_write_header  856 fs/gfs2/log.c  	log_write_header(sdp, GFS2_LOG_HEAD_UNMOUNT,