Merge branch 'readdir' (readdir speedup and sanity checking)

[linux-block.git] / include / linux / rcuwait.h

diff --git a/include/linux/rcuwait.h b/include/linux/rcuwait.h
index 563290fc194f247d92ab2cd430fcf99d8706f725..75c97e4bbc574794e9320e4a01085537dc16c698 100644 (file)
--- a/include/linux/rcuwait.h
+++ b/include/linux/rcuwait.h
@@ -6,16 +6,11 @@
 
 /*
  * rcuwait provides a way of blocking and waking up a single
- * task in an rcu-safe manner; where it is forbidden to use
- * after exit_notify(). task_struct is not properly rcu protected,
- * unless dealing with rcu-aware lists, ie: find_task_by_*().
+ * task in an rcu-safe manner.
  *
- * Alternatively we have task_rcu_dereference(), but the return
- * semantics have different implications which would break the
- * wakeup side. The only time @task is non-nil is when a user is
- * blocked (or checking if it needs to) on a condition, and reset
- * as soon as we know that the condition has succeeded and are
- * awoken.
+ * The only time @task is non-nil is when a user is blocked (or
+ * checking if it needs to) on a condition, and reset as soon as we
+ * know that the condition has succeeded and are awoken.
  */
 struct rcuwait {
        struct task_struct __rcu *task;
@@ -37,13 +32,6 @@ extern void rcuwait_wake_up(struct rcuwait *w);
  */
 #define rcuwait_wait_event(w, condition)                               \
 ({                                                                     \
-       /*                                                              \
-        * Complain if we are called after do_exit()/exit_notify(),     \
-        * as we cannot rely on the rcu critical region for the         \
-        * wakeup side.                                                 \
-        */                                                             \
-       WARN_ON(current->exit_state);                                   \
-                                                                       \
        rcu_assign_pointer((w)->task, current);                         \
        for (;;) {                                                      \
                /*                                                      \