Freezer: make kernel threads nonfreezable by default

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

diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index 1045ee9..2d38b1a 100644 (file)
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -1,5 +1,8 @@
 /* Freezer declarations */
 
+#ifndef FREEZER_H_INCLUDED
+#define FREEZER_H_INCLUDED
+
 #include <linux/sched.h>
 
 #ifdef CONFIG_PM
@@ -58,18 +61,6 @@ static inline int thaw_process(struct task_struct *p)
        return 0;
 }
 
-/*
- * freezing is complete, mark process as frozen
- */
-static inline void frozen_process(struct task_struct *p)
-{
-       if (!unlikely(p->flags & PF_NOFREEZE)) {
-               p->flags |= PF_FROZEN;
-               wmb();
-       }
-       clear_tsk_thread_flag(p, TIF_FREEZE);
-}
-
 extern void refrigerator(void);
 extern int freeze_processes(void);
 extern void thaw_processes(void);
@@ -127,12 +118,19 @@ static inline int freezer_should_skip(struct task_struct *p)
        return !!(p->flags & PF_FREEZER_SKIP);
 }
 
+/*
+ * Tell the freezer that the current task should be frozen by it
+ */
+static inline void set_freezable(void)
+{
+       current->flags &= ~PF_NOFREEZE;
+}
+
 #else
 static inline int frozen(struct task_struct *p) { return 0; }
 static inline int freezing(struct task_struct *p) { return 0; }
 static inline void freeze(struct task_struct *p) { BUG(); }
 static inline int thaw_process(struct task_struct *p) { return 1; }
-static inline void frozen_process(struct task_struct *p) { BUG(); }
 
 static inline void refrigerator(void) {}
 static inline int freeze_processes(void) { BUG(); return 0; }
@@ -143,4 +141,7 @@ static inline int try_to_freeze(void) { return 0; }
 static inline void freezer_do_not_count(void) {}
 static inline void freezer_count(void) {}
 static inline int freezer_should_skip(struct task_struct *p) { return 0; }
+static inline void set_freezable(void) {}
 #endif
+
+#endif /* FREEZER_H_INCLUDED */