5 files changed, 18 insertions, 27 deletions

diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index d02b78448b0f..ba4f512d2938 100644
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -45,7 +45,7 @@ static inline bool should_send_signal(struct task_struct *p)
 }
 
 /* Takes and releases task alloc lock using task_lock() */
-extern int thaw_process(struct task_struct *p);
+extern void __thaw_task(struct task_struct *t);
 
 extern bool __refrigerator(bool check_kthr_stop);
 extern int freeze_processes(void);
@@ -178,7 +178,6 @@ static inline int frozen(struct task_struct *p) { return 0; }
 static inline int freezing(struct task_struct *p) { return 0; }
 static inline void set_freeze_flag(struct task_struct *p) {}
 static inline void clear_freeze_flag(struct task_struct *p) {}
-static inline int thaw_process(struct task_struct *p) { return 1; }
 
 static inline bool __refrigerator(bool check_kthr_stop) { return false; }
 static inline int freeze_processes(void) { return -ENOSYS; }
diff --git a/kernel/cgroup_freezer.c b/kernel/cgroup_freezer.c
index 5e828a2ca8e6..a6d405a86ee0 100644
--- a/kernel/cgroup_freezer.c
+++ b/kernel/cgroup_freezer.c
@@ -130,7 +130,7 @@ struct cgroup_subsys freezer_subsys;
  *   write_lock css_set_lock (cgroup iterator start)
  *    task->alloc_lock
  *   read_lock css_set_lock (cgroup iterator start)
- *    task->alloc_lock (inside thaw_process(), prevents race with refrigerator())
+ *    task->alloc_lock (inside __thaw_task(), prevents race with refrigerator())
  *     sighand->siglock
  */
 static struct cgroup_subsys_state *freezer_create(struct cgroup_subsys *ss,
@@ -300,9 +300,8 @@ static void unfreeze_cgroup(struct cgroup *cgroup, struct freezer *freezer)
         struct task_struct *task;
 
         cgroup_iter_start(cgroup, &it);
-        while ((task = cgroup_iter_next(cgroup, &it))) {
-                thaw_process(task);
-        }
+        while ((task = cgroup_iter_next(cgroup, &it)))
+                __thaw_task(task);
         cgroup_iter_end(cgroup, &it);
 
         freezer->state = CGROUP_THAWED;
diff --git a/kernel/freezer.c b/kernel/freezer.c
index b83c30e9483a..c851d588e29f 100644
--- a/kernel/freezer.c
+++ b/kernel/freezer.c
@@ -145,18 +145,8 @@ void cancel_freezing(struct task_struct *p)
         }
 }
 
-static int __thaw_process(struct task_struct *p)
-{
-        if (frozen(p)) {
-                p->flags &= ~PF_FROZEN;
-                return 1;
-        }
-        clear_freeze_flag(p);
-        return 0;
-}
-
 /*
- * Wake up a frozen process
+ * Wake up a frozen task
  *
  * task_lock() is needed to prevent the race with refrigerator() which may
  * occur if the freezing of tasks fails.  Namely, without the lock, if the
@@ -164,15 +154,18 @@ static int __thaw_process(struct task_struct *p)
  * refrigerator() could call frozen_process(), in which case the task would be
  * frozen and no one would thaw it.
  */
-int thaw_process(struct task_struct *p)
+void __thaw_task(struct task_struct *p)
 {
+        bool was_frozen;
+
         task_lock(p);
-        if (__thaw_process(p) == 1) {
-                task_unlock(p);
-                wake_up_process(p);
-                return 1;
-        }
+        was_frozen = frozen(p);
+        if (was_frozen)
+                p->flags &= ~PF_FROZEN;
+        else
+                clear_freeze_flag(p);
         task_unlock(p);
-        return 0;
+
+        if (was_frozen)
+                wake_up_process(p);
 }
-EXPORT_SYMBOL(thaw_process);
diff --git a/kernel/power/process.c b/kernel/power/process.c
index addbbe5531bc..fe2787207f00 100644
--- a/kernel/power/process.c
+++ b/kernel/power/process.c
@@ -186,7 +186,7 @@ static void thaw_tasks(bool nosig_only)
                 if (cgroup_freezing_or_frozen(p))
                         continue;
 
-                thaw_process(p);
+                __thaw_task(p);
         } while_each_thread(g, p);
         read_unlock(&tasklist_lock);
 }
diff --git a/mm/oom_kill.c b/mm/oom_kill.c
index 76f2c5ae908e..3134ee2fb2e8 100644
--- a/mm/oom_kill.c
+++ b/mm/oom_kill.c
@@ -328,7 +328,7 @@ static struct task_struct *select_bad_process(unsigned int *ppoints,
                  */
                 if (test_tsk_thread_flag(p, TIF_MEMDIE)) {
                         if (unlikely(frozen(p)))
-                                thaw_process(p);
+                                __thaw_task(p);
                         return ERR_PTR(-1UL);
                 }
                 if (!p->mm)