[PATCH] RCU Documentation fix

Updater should use _rcu variant of list_del().

Signed-off-by: Urs Thuermann <urs@isnogud.escape.de>
Acked-by: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/Documentation/RCU/whatisRCU.txt b/Documentation/RCU/whatisRCU.txt
index 4f41a60..318df44 100644 (file)
--- a/Documentation/RCU/whatisRCU.txt
+++ b/Documentation/RCU/whatisRCU.txt
@@ -687,8 +687,9 @@ diff shows how closely related RCU and reader-writer locking can be.
        +       spin_lock(&listmutex);
                list_for_each_entry(p, head, lp) {
                        if (p->key == key) {
-                               list_del(&p->list);
+       -                       list_del(&p->list);
        -                       write_unlock(&listmutex);
+       +                       list_del_rcu(&p->list);
        +                       spin_unlock(&listmutex);
        +                       synchronize_rcu();
                                kfree(p);
@@ -736,7 +737,7 @@ Or, for those who prefer a side-by-side listing:
  5   write_lock(&listmutex);            5   spin_lock(&listmutex);
  6   list_for_each_entry(p, head, lp) { 6   list_for_each_entry(p, head, lp) {
  7     if (p->key == key) {             7     if (p->key == key) {
- 8       list_del(&p->list);            8       list_del(&p->list);
+ 8       list_del(&p->list);            8       list_del_rcu(&p->list);
  9       write_unlock(&listmutex);      9       spin_unlock(&listmutex);
                                        10       synchronize_rcu();
 10       kfree(p);                     11       kfree(p);