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-rw-r--r--include/linux/freezer.h84
-rw-r--r--include/linux/sched.h81
2 files changed, 84 insertions, 81 deletions
diff --git a/include/linux/freezer.h b/include/linux/freezer.h
new file mode 100644
index 000000000000..266373f74445
--- /dev/null
+++ b/include/linux/freezer.h
@@ -0,0 +1,84 @@
1/* Freezer declarations */
2
3#ifdef CONFIG_PM
4/*
5 * Check if a process has been frozen
6 */
7static inline int frozen(struct task_struct *p)
8{
9 return p->flags & PF_FROZEN;
10}
11
12/*
13 * Check if there is a request to freeze a process
14 */
15static inline int freezing(struct task_struct *p)
16{
17 return p->flags & PF_FREEZE;
18}
19
20/*
21 * Request that a process be frozen
22 * FIXME: SMP problem. We may not modify other process' flags!
23 */
24static inline void freeze(struct task_struct *p)
25{
26 p->flags |= PF_FREEZE;
27}
28
29/*
30 * Sometimes we may need to cancel the previous 'freeze' request
31 */
32static inline void do_not_freeze(struct task_struct *p)
33{
34 p->flags &= ~PF_FREEZE;
35}
36
37/*
38 * Wake up a frozen process
39 */
40static inline int thaw_process(struct task_struct *p)
41{
42 if (frozen(p)) {
43 p->flags &= ~PF_FROZEN;
44 wake_up_process(p);
45 return 1;
46 }
47 return 0;
48}
49
50/*
51 * freezing is complete, mark process as frozen
52 */
53static inline void frozen_process(struct task_struct *p)
54{
55 p->flags = (p->flags & ~PF_FREEZE) | PF_FROZEN;
56}
57
58extern void refrigerator(void);
59extern int freeze_processes(void);
60extern void thaw_processes(void);
61
62static inline int try_to_freeze(void)
63{
64 if (freezing(current)) {
65 refrigerator();
66 return 1;
67 } else
68 return 0;
69}
70#else
71static inline int frozen(struct task_struct *p) { return 0; }
72static inline int freezing(struct task_struct *p) { return 0; }
73static inline void freeze(struct task_struct *p) { BUG(); }
74static inline int thaw_process(struct task_struct *p) { return 1; }
75static inline void frozen_process(struct task_struct *p) { BUG(); }
76
77static inline void refrigerator(void) {}
78static inline int freeze_processes(void) { BUG(); return 0; }
79static inline void thaw_processes(void) {}
80
81static inline int try_to_freeze(void) { return 0; }
82
83
84#endif
diff --git a/include/linux/sched.h b/include/linux/sched.h
index acfd2e15c5f2..837a012f573c 100644
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -1618,87 +1618,6 @@ extern int sched_create_sysfs_power_savings_entries(struct sysdev_class *cls);
1618 1618
1619extern void normalize_rt_tasks(void); 1619extern void normalize_rt_tasks(void);
1620 1620
1621#ifdef CONFIG_PM
1622/*
1623 * Check if a process has been frozen
1624 */
1625static inline int frozen(struct task_struct *p)
1626{
1627 return p->flags & PF_FROZEN;
1628}
1629
1630/*
1631 * Check if there is a request to freeze a process
1632 */
1633static inline int freezing(struct task_struct *p)
1634{
1635 return p->flags & PF_FREEZE;
1636}
1637
1638/*
1639 * Request that a process be frozen
1640 * FIXME: SMP problem. We may not modify other process' flags!
1641 */
1642static inline void freeze(struct task_struct *p)
1643{
1644 p->flags |= PF_FREEZE;
1645}
1646
1647/*
1648 * Sometimes we may need to cancel the previous 'freeze' request
1649 */
1650static inline void do_not_freeze(struct task_struct *p)
1651{
1652 p->flags &= ~PF_FREEZE;
1653}
1654
1655/*
1656 * Wake up a frozen process
1657 */
1658static inline int thaw_process(struct task_struct *p)
1659{
1660 if (frozen(p)) {
1661 p->flags &= ~PF_FROZEN;
1662 wake_up_process(p);
1663 return 1;
1664 }
1665 return 0;
1666}
1667
1668/*
1669 * freezing is complete, mark process as frozen
1670 */
1671static inline void frozen_process(struct task_struct *p)
1672{
1673 p->flags = (p->flags & ~PF_FREEZE) | PF_FROZEN;
1674}
1675
1676extern void refrigerator(void);
1677extern int freeze_processes(void);
1678extern void thaw_processes(void);
1679
1680static inline int try_to_freeze(void)
1681{
1682 if (freezing(current)) {
1683 refrigerator();
1684 return 1;
1685 } else
1686 return 0;
1687}
1688#else
1689static inline int frozen(struct task_struct *p) { return 0; }
1690static inline int freezing(struct task_struct *p) { return 0; }
1691static inline void freeze(struct task_struct *p) { BUG(); }
1692static inline int thaw_process(struct task_struct *p) { return 1; }
1693static inline void frozen_process(struct task_struct *p) { BUG(); }
1694
1695static inline void refrigerator(void) {}
1696static inline int freeze_processes(void) { BUG(); return 0; }
1697static inline void thaw_processes(void) {}
1698
1699static inline int try_to_freeze(void) { return 0; }
1700
1701#endif /* CONFIG_PM */
1702#endif /* __KERNEL__ */ 1621#endif /* __KERNEL__ */
1703 1622
1704#endif 1623#endif