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- /* Freezer declarations */
- #include <linux/sched.h>
- #ifdef CONFIG_PM
- /*
- * 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 test_tsk_thread_flag(p, TIF_FREEZE);
- }
- /*
- * Request that a process be frozen
- */
- static inline void freeze(struct task_struct *p)
- {
- set_tsk_thread_flag(p, TIF_FREEZE);
- }
- /*
- * Sometimes we may need to cancel the previous 'freeze' request
- */
- static inline void do_not_freeze(struct task_struct *p)
- {
- clear_tsk_thread_flag(p, TIF_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 |= PF_FROZEN;
- wmb();
- clear_tsk_thread_flag(p, TIF_FREEZE);
- }
- extern void refrigerator(void);
- extern int freeze_processes(void);
- extern void thaw_processes(void);
- static inline int try_to_freeze(void)
- {
- if (freezing(current)) {
- refrigerator();
- return 1;
- } else
- return 0;
- }
- extern void thaw_some_processes(int all);
- #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; }
- static inline void thaw_processes(void) {}
- static inline int try_to_freeze(void) { return 0; }
- #endif
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