mnt: In umount_tree reuse mnt_list instead of mnt_hash
umount_tree builds a list of mounts that need to be unmounted.
Utilize mnt_list for this purpose instead of mnt_hash. This begins to
allow keeping a mount on the mnt_hash after it is unmounted, which is
necessary for a properly functioning MNT_LOCKED implementation.
The fact that mnt_list is an ordinary list makding available list_move
is nice bonus.
Cc: [email protected]
Signed-off-by: "Eric W. Biederman" <[email protected]>
diff --git a/fs/pnode.c b/fs/pnode.c
index 260ac8f..bf012af 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -384,7 +384,7 @@
if (child && list_empty(&child->mnt_mounts)) {
list_del_init(&child->mnt_child);
hlist_del_init_rcu(&child->mnt_hash);
- hlist_add_before_rcu(&child->mnt_hash, &mnt->mnt_hash);
+ list_move_tail(&child->mnt_list, &mnt->mnt_list);
}
}
}
@@ -396,11 +396,11 @@
*
* vfsmount lock must be held for write
*/
-int propagate_umount(struct hlist_head *list)
+int propagate_umount(struct list_head *list)
{
struct mount *mnt;
- hlist_for_each_entry(mnt, list, mnt_hash)
+ list_for_each_entry(mnt, list, mnt_list)
__propagate_umount(mnt);
return 0;
}