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Merge Christoph's freeze cleanup patch

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Linus Torvalds
2005-06-25 17:16:53 -07:00
parent 98e7f29418 3e1d1d28d9
commit 2031d0f586
47 changed files with 126 additions and 112 deletions
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73
include/linux/sched.h
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@@ -1265,33 +1265,78 @@ extern void normalize_rt_tasks(void);
#endif
/* try_to_freeze
*
* Checks whether we need to enter the refrigerator
* and returns 1 if we did so.
*/
#ifdef CONFIG_PM
extern void refrigerator(unsigned long);
/*
* Check if a process has been frozen
*/
static inline int frozen(struct task_struct *p)
{
return p->flags & PF_FROZEN;
}
/*
* Check if there is a request to freeze a process
*/
static inline int freezing(struct task_struct *p)
{
return p->flags & PF_FREEZE;
}
/*
* Request that a process be frozen
* FIXME: SMP problem. We may not modify other process' flags!
*/
static inline void freeze(struct task_struct *p)
{
p->flags |= PF_FREEZE;
}
/*
* Wake up a frozen process
*/
static inline int thaw_process(struct task_struct *p)
{
if (frozen(p)) {
p->flags &= ~PF_FROZEN;
wake_up_process(p);
return 1;
}
return 0;
}
/*
* freezing is complete, mark process as frozen
*/
static inline void frozen_process(struct task_struct *p)
{
p->flags = (p->flags & ~PF_FREEZE) | PF_FROZEN;
}
extern void refrigerator(void);
extern int freeze_processes(void);
extern void thaw_processes(void);
static inline int try_to_freeze(unsigned long refrigerator_flags)
static inline int try_to_freeze(void)
{
if (unlikely(current->flags & PF_FREEZE)) {
refrigerator(refrigerator_flags);
if (freezing(current)) {
refrigerator();
return 1;
} else
return 0;
}
#else
static inline void refrigerator(unsigned long flag) {}
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; }
static inline void thaw_processes(void) {}
static inline int try_to_freeze(unsigned long refrigerator_flags)
{
return 0;
}
static inline int try_to_freeze(void) { return 0; }
#endif /* CONFIG_PM */
#endif /* __KERNEL__ */