1820 static void umount_tree(struct mount *mnt, enum umount_tree_flags how)  in umount_tree()  function
1997 		umount_tree(mnt, UMOUNT_PROPAGATE);  in do_umount()
2004 			umount_tree(mnt, UMOUNT_PROPAGATE|UMOUNT_SYNC);  in do_umount()
2041 		else umount_tree(mnt, UMOUNT_CONNECTED);  in __detach_mounts()
2279 		umount_tree(res, UMOUNT_SYNC);  in copy_tree()
2370 		umount_tree(m, UMOUNT_CONNECTED);  in dissolve_on_fput()
2724 		umount_tree(child, UMOUNT_SYNC);  in attach_recursive_mnt()
3050 		umount_tree(mnt, UMOUNT_SYNC);  in do_loopback()
3917 		umount_tree(mnt, UMOUNT_PROPAGATE|UMOUNT_SYNC);  in mark_mounts_for_expiry()
3988 			umount_tree(m, UMOUNT_PROPAGATE|UMOUNT_SYNC);  in shrink_submounts()
6168 	umount_tree(ns->root, 0);  in put_mnt_ns()