drbd: The kernel code is now equivalent to out of tree release 8.3.7

[safe/jmp/linux-2.6] / include / linux / freezer.h

diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index 17e3bb4..5a361f8 100644 (file)
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -44,28 +44,8 @@ static inline bool should_send_signal(struct task_struct *p)
        return !(p->flags & PF_FREEZER_NOSIG);
 }
 
-/*
- * Wake up a frozen process
- *
- * task_lock() is taken to prevent the race with refrigerator() which may
- * occur if the freezing of tasks fails.  Namely, without the lock, if the
- * freezing of tasks failed, thaw_tasks() might have run before a task in
- * refrigerator() could call frozen_process(), in which case the task would be
- * frozen and no one would thaw it.
- */
-static inline int thaw_process(struct task_struct *p)
-{
-       task_lock(p);
-       if (frozen(p)) {
-               p->flags &= ~PF_FROZEN;
-               task_unlock(p);
-               wake_up_process(p);
-               return 1;
-       }
-       clear_freeze_flag(p);
-       task_unlock(p);
-       return 0;
-}
+/* Takes and releases task alloc lock using task_lock() */
+extern int thaw_process(struct task_struct *p);
 
 extern void refrigerator(void);
 extern int freeze_processes(void);
@@ -83,6 +63,12 @@ static inline int try_to_freeze(void)
 extern bool freeze_task(struct task_struct *p, bool sig_only);
 extern void cancel_freezing(struct task_struct *p);
 
+#ifdef CONFIG_CGROUP_FREEZER
+extern int cgroup_frozen(struct task_struct *task);
+#else /* !CONFIG_CGROUP_FREEZER */
+static inline int cgroup_frozen(struct task_struct *task) { return 0; }
+#endif /* !CONFIG_CGROUP_FREEZER */
+
 /*
  * The PF_FREEZER_SKIP flag should be set by a vfork parent right before it
  * calls wait_for_completion(&vfork) and reset right after it returns from this