Merge branch 'writeback-for-2.6.34' into nfs-for-2.6.34

1 files changed, 1 insertions, 1 deletions

diff --git a/include/linux/cred.h b/include/linux/cred.h
index 4e3387a89cb9..4db09f89b637 100644
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
@@ -280,7 +280,7 @@ static inline void put_cred(const struct cred *_cred)
  * task or by holding tasklist_lock to prevent it from being unlinked.
  */
 #define __task_cred(task) \
-        ((const struct cred *)(rcu_dereference((task)->real_cred)))
+        ((const struct cred *)(rcu_dereference_check((task)->real_cred, rcu_read_lock_held() || lockdep_is_held(&tasklist_lock))))
 
 /**
  * get_task_cred - Get another task's objective credentials