freezer: clean up freeze_processes() failure path

[firefly-linux-kernel-4.4.55.git] / include / linux / freezer.h

diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index a5386e3ee756d6c85981b033dc0000deebfa59b7..93f411a52872cafe071b4c4de9d9c936062e20c7 100644 (file)
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -45,24 +45,22 @@ 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 void refrigerator(void);
+extern bool __refrigerator(bool check_kthr_stop);
 extern int freeze_processes(void);
 extern int freeze_kernel_threads(void);
 extern void thaw_processes(void);
 
-static inline int try_to_freeze(void)
+static inline bool try_to_freeze(void)
 {
-       if (freezing(current)) {
-               refrigerator();
-               return 1;
-       } else
-               return 0;
+       might_sleep();
+       if (likely(!freezing(current)))
+               return false;
+       return __refrigerator(false);
 }
 
 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_freezing_or_frozen(struct task_struct *task);
@@ -179,14 +177,13 @@ 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 void refrigerator(void) {}
+static inline bool __refrigerator(bool check_kthr_stop) { return false; }
 static inline int freeze_processes(void) { return -ENOSYS; }
 static inline int freeze_kernel_threads(void) { return -ENOSYS; }
 static inline void thaw_processes(void) {}
 
-static inline int try_to_freeze(void) { return 0; }
+static inline bool try_to_freeze(void) { return false; }
 
 static inline void freezer_do_not_count(void) {}
 static inline void freezer_count(void) {}