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Diffstat (limited to 'include/linux/freezer.h')
-rw-r--r--include/linux/freezer.h40
1 files changed, 17 insertions, 23 deletions
diff --git a/include/linux/freezer.h b/include/linux/freezer.h
index deddeedf325..5a361f85cfe 100644
--- a/include/linux/freezer.h
+++ b/include/linux/freezer.h
@@ -6,7 +6,7 @@
#include <linux/sched.h>
#include <linux/wait.h>
-#ifdef CONFIG_PM_SLEEP
+#ifdef CONFIG_FREEZER
/*
* Check if a process has been frozen
*/
@@ -39,29 +39,14 @@ static inline void clear_freeze_flag(struct task_struct *p)
clear_tsk_thread_flag(p, TIF_FREEZE);
}
-/*
- * Wake up a frozen process
- *
- * task_lock() is taken to prevent the race with refrigerator() which may
- * occur if the freezing of tasks fails. Namely, without the lock, if the
- * freezing of tasks failed, thaw_tasks() might have run before a task in
- * refrigerator() could call frozen_process(), in which case the task would be
- * frozen and no one would thaw it.
- */
-static inline int thaw_process(struct task_struct *p)
+static inline bool should_send_signal(struct task_struct *p)
{
- task_lock(p);
- if (frozen(p)) {
- p->flags &= ~PF_FROZEN;
- task_unlock(p);
- wake_up_process(p);
- return 1;
- }
- clear_freeze_flag(p);
- task_unlock(p);
- return 0;
+ return !(p->flags & PF_FREEZER_NOSIG);
}
+/* Takes and releases task alloc lock using task_lock() */
+extern int thaw_process(struct task_struct *p);
+
extern void refrigerator(void);
extern int freeze_processes(void);
extern void thaw_processes(void);
@@ -75,6 +60,15 @@ static inline int try_to_freeze(void)
return 0;
}
+extern bool freeze_task(struct task_struct *p, bool sig_only);
+extern void cancel_freezing(struct task_struct *p);
+
+#ifdef CONFIG_CGROUP_FREEZER
+extern int cgroup_frozen(struct task_struct *task);
+#else /* !CONFIG_CGROUP_FREEZER */
+static inline int cgroup_frozen(struct task_struct *task) { return 0; }
+#endif /* !CONFIG_CGROUP_FREEZER */
+
/*
* The PF_FREEZER_SKIP flag should be set by a vfork parent right before it
* calls wait_for_completion(&vfork) and reset right after it returns from this
@@ -166,7 +160,7 @@ static inline void set_freezable_with_signal(void)
} while (try_to_freeze()); \
__retval; \
})
-#else /* !CONFIG_PM_SLEEP */
+#else /* !CONFIG_FREEZER */
static inline int frozen(struct task_struct *p) { return 0; }
static inline int freezing(struct task_struct *p) { return 0; }
static inline void set_freeze_flag(struct task_struct *p) {}
@@ -191,6 +185,6 @@ static inline void set_freezable_with_signal(void) {}
#define wait_event_freezable_timeout(wq, condition, timeout) \
wait_event_interruptible_timeout(wq, condition, timeout)
-#endif /* !CONFIG_PM_SLEEP */
+#endif /* !CONFIG_FREEZER */
#endif /* FREEZER_H_INCLUDED */