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/* SPDX-License-Identifier: GPL-2.0 */ #ifndef _LINUX_USER_RETURN_NOTIFIER_H #define _LINUX_USER_RETURN_NOTIFIER_H #ifdef CONFIG_USER_RETURN_NOTIFIER #include <linux/list.h> #include <linux/sched.h> struct user_return_notifier { void (*on_user_return)(struct user_return_notifier *urn); struct hlist_node link; }; void user_return_notifier_register(struct user_return_notifier *urn); void user_return_notifier_unregister(struct user_return_notifier *urn); static inline void propagate_user_return_notify(struct task_struct *prev, struct task_struct *next) { if (test_tsk_thread_flag(prev, TIF_USER_RETURN_NOTIFY)) { clear_tsk_thread_flag(prev, TIF_USER_RETURN_NOTIFY); set_tsk_thread_flag(next, TIF_USER_RETURN_NOTIFY); } } void fire_user_return_notifiers(void); static inline void clear_user_return_notifier(struct task_struct *p) { clear_tsk_thread_flag(p, TIF_USER_RETURN_NOTIFY); } #else struct user_return_notifier {}; static inline void propagate_user_return_notify(struct task_struct *prev, struct task_struct *next) { } static inline void fire_user_return_notifiers(void) {} static inline void clear_user_return_notifier(struct task_struct *p) {} #endif #endif
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