1477 static void umount_tree(struct mount *mnt, enum umount_tree_flags how)  in umount_tree()  function
1635 			umount_tree(mnt, UMOUNT_PROPAGATE);  in do_umount()
1642 				umount_tree(mnt, UMOUNT_PROPAGATE|UMOUNT_SYNC);  in do_umount()
1680 		else umount_tree(mnt, UMOUNT_CONNECTED);  in __detach_mounts()
1863 		umount_tree(res, UMOUNT_SYNC);  in copy_tree()
1897 			umount_tree(real_mount(mnt), UMOUNT_CONNECTED);  in dissolve_on_fput()
1911 	umount_tree(real_mount(mnt), 0);  in drop_collected_mounts()
2173 		umount_tree(child, UMOUNT_SYNC);  in attach_recursive_mnt()
2368 		umount_tree(mnt, UMOUNT_SYNC);  in do_loopback()
2999 		umount_tree(mnt, UMOUNT_PROPAGATE|UMOUNT_SYNC);  in mark_mounts_for_expiry()
3070 			umount_tree(m, UMOUNT_PROPAGATE|UMOUNT_SYNC);  in shrink_submounts()