2009-09-19 00:40:22 -06:00
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#ifndef _LINUX_USER_RETURN_NOTIFIER_H
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#define _LINUX_USER_RETURN_NOTIFIER_H
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#ifdef CONFIG_USER_RETURN_NOTIFIER
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#include <linux/list.h>
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#include <linux/sched.h>
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struct user_return_notifier {
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void (*on_user_return)(struct user_return_notifier *urn);
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struct hlist_node link;
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};
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void user_return_notifier_register(struct user_return_notifier *urn);
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void user_return_notifier_unregister(struct user_return_notifier *urn);
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static inline void propagate_user_return_notify(struct task_struct *prev,
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struct task_struct *next)
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{
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if (test_tsk_thread_flag(prev, TIF_USER_RETURN_NOTIFY)) {
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clear_tsk_thread_flag(prev, TIF_USER_RETURN_NOTIFY);
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set_tsk_thread_flag(next, TIF_USER_RETURN_NOTIFY);
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}
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}
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void fire_user_return_notifiers(void);
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2009-11-29 07:34:48 -07:00
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static inline void clear_user_return_notifier(struct task_struct *p)
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{
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clear_tsk_thread_flag(p, TIF_USER_RETURN_NOTIFY);
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}
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2009-09-19 00:40:22 -06:00
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#else
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struct user_return_notifier {};
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static inline void propagate_user_return_notify(struct task_struct *prev,
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struct task_struct *next)
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{
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}
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static inline void fire_user_return_notifiers(void) {}
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2009-11-29 07:34:48 -07:00
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static inline void clear_user_return_notifier(struct task_struct *p) {}
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2009-09-19 00:40:22 -06:00
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#endif
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#endif
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