Merge branch 'for-2.6.37/barrier' of git://git.kernel.dk/linux-2.6-block

[pandora-kernel.git] / kernel / pid.c

diff --git a/kernel/pid.c b/kernel/pid.c
index d55c6fb..39b65b6 100644 (file)
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -401,7 +401,7 @@ struct task_struct *pid_task(struct pid *pid, enum pid_type type)
        struct task_struct *result = NULL;
        if (pid) {
                struct hlist_node *first;
-               first = rcu_dereference_check(pid->tasks[type].first,
+               first = rcu_dereference_check(hlist_first_rcu(&pid->tasks[type]),
                                              rcu_read_lock_held() ||
                                              lockdep_tasklist_lock_is_held());
                if (first)
@@ -416,6 +416,7 @@ EXPORT_SYMBOL(pid_task);
  */
 struct task_struct *find_task_by_pid_ns(pid_t nr, struct pid_namespace *ns)
 {
+       rcu_lockdep_assert(rcu_read_lock_held());
        return pid_task(find_pid_ns(nr, ns), PIDTYPE_PID);
 }