+/*
+ * go through the vfsmounts we've just consigned to the graveyard to
+ * - check that they're still dead
+ * - delete the vfsmount from the appropriate namespace under lock
+ * - dispose of the corpse
+ */
+static void expire_mount_list(struct list_head *graveyard, struct list_head *mounts)
+{
+ struct mnt_namespace *ns;
+ struct vfsmount *mnt;
+
+ while (!list_empty(graveyard)) {
+ LIST_HEAD(umounts);
+ mnt = list_entry(graveyard->next, struct vfsmount, mnt_expire);
+ list_del_init(&mnt->mnt_expire);
+
+ /* don't do anything if the namespace is dead - all the
+ * vfsmounts from it are going away anyway */
+ ns = mnt->mnt_ns;
+ if (!ns || !ns->root)
+ continue;
+ get_mnt_ns(ns);
+
+ spin_unlock(&vfsmount_lock);
+ down_write(&namespace_sem);
+ expire_mount(mnt, mounts, &umounts);
+ up_write(&namespace_sem);
+ release_mounts(&umounts);
+ mntput(mnt);
+ put_mnt_ns(ns);
+ spin_lock(&vfsmount_lock);
+ }
+}
+