x86 mmiotrace: fix remove_kmmio_fault_pages()
[linux-2.6.git] / arch / x86 / mm / kmmio.c
index 9f205030d9aac6a6dbdb6f620b47fcba8b4acb2f..6a518dd08a36511661df2842815781c94a680fbd 100644 (file)
@@ -451,23 +451,24 @@ static void rcu_free_kmmio_fault_pages(struct rcu_head *head)
 
 static void remove_kmmio_fault_pages(struct rcu_head *head)
 {
-       struct kmmio_delayed_release *dr = container_of(
-                                               head,
-                                               struct kmmio_delayed_release,
-                                               rcu);
+       struct kmmio_delayed_release *dr =
+               container_of(head, struct kmmio_delayed_release, rcu);
        struct kmmio_fault_page *p = dr->release_list;
        struct kmmio_fault_page **prevp = &dr->release_list;
        unsigned long flags;
+
        spin_lock_irqsave(&kmmio_lock, flags);
        while (p) {
-               if (!p->count)
+               if (!p->count) {
                        list_del_rcu(&p->list);
-               else
+                       prevp = &p->release_next;
+               } else {
                        *prevp = p->release_next;
-               prevp = &p->release_next;
+               }
                p = p->release_next;
        }
        spin_unlock_irqrestore(&kmmio_lock, flags);
+
        /* This is the real RCU destroy call. */
        call_rcu(&dr->rcu, rcu_free_kmmio_fault_pages);
 }