mountlist_scan
count = mountlist_scan(cache_clrmountpt_callback, nch,
mountlist_scan(cache_findmount_callback, &info,
mountlist_scan(db_show_locked_vnodes, NULL,
count = mountlist_scan(vfs_umountall_callback, &halting,
mountlist_scan(sync_callback, NULL, MNTSCAN_FORWARD);
mountlist_scan(getfsstat_callback, &info, MNTSCAN_FORWARD);
mountlist_scan(getvfsstat_callback, &info, MNTSCAN_FORWARD);
int mountlist_scan(int (*callback)(struct mount *, void *), void *, int);
mountlist_scan(clear_inodedeps_mountlist_callback,