a9b6f562f1
Move the loop from thaw_processes() to a separate function and call it independently for kernel threads and user space processes so that the order of thawing tasks is clearly visible. Drop thaw_kernel_threads() which is never used. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Cc: Pavel Machek <pavel@ucw.cz> Cc: Nigel Cunningham <nigel@suspend2.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
88 lines
1.8 KiB
C
88 lines
1.8 KiB
C
/* Freezer declarations */
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#ifdef CONFIG_PM
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/*
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* Check if a process has been frozen
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*/
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static inline int frozen(struct task_struct *p)
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{
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return p->flags & PF_FROZEN;
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}
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/*
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* Check if there is a request to freeze a process
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*/
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static inline int freezing(struct task_struct *p)
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{
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return p->flags & PF_FREEZE;
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}
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/*
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* Request that a process be frozen
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* FIXME: SMP problem. We may not modify other process' flags!
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*/
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static inline void freeze(struct task_struct *p)
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{
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p->flags |= PF_FREEZE;
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}
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/*
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* Sometimes we may need to cancel the previous 'freeze' request
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*/
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static inline void do_not_freeze(struct task_struct *p)
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{
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p->flags &= ~PF_FREEZE;
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}
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/*
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* Wake up a frozen process
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*/
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static inline int thaw_process(struct task_struct *p)
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{
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if (frozen(p)) {
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p->flags &= ~PF_FROZEN;
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wake_up_process(p);
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return 1;
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}
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return 0;
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}
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/*
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* freezing is complete, mark process as frozen
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*/
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static inline void frozen_process(struct task_struct *p)
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{
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p->flags = (p->flags & ~PF_FREEZE) | PF_FROZEN;
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}
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extern void refrigerator(void);
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extern int freeze_processes(void);
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extern void thaw_processes(void);
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static inline int try_to_freeze(void)
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{
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if (freezing(current)) {
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refrigerator();
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return 1;
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} else
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return 0;
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}
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extern void thaw_some_processes(int all);
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#else
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static inline int frozen(struct task_struct *p) { return 0; }
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static inline int freezing(struct task_struct *p) { return 0; }
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static inline void freeze(struct task_struct *p) { BUG(); }
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static inline int thaw_process(struct task_struct *p) { return 1; }
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static inline void frozen_process(struct task_struct *p) { BUG(); }
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static inline void refrigerator(void) {}
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static inline int freeze_processes(void) { BUG(); return 0; }
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static inline void thaw_processes(void) {}
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static inline int try_to_freeze(void) { return 0; }
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#endif
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