1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3  *  arch/arm/include/asm/thread_notify.h
4  *
5  *  Copyright (C) 2006 Russell King.
6  */
7 #ifndef ASMARM_THREAD_NOTIFY_H
8 #define ASMARM_THREAD_NOTIFY_H
9 
10 #ifdef __KERNEL__
11 
12 #ifndef __ASSEMBLY__
13 
14 #include <linux/notifier.h>
15 #include <asm/thread_info.h>
16 
17 static inline int thread_register_notifier(struct notifier_block *n)
18 {
19 	extern struct atomic_notifier_head thread_notify_head;
20 	return atomic_notifier_chain_register(&thread_notify_head, n);
21 }
22 
23 static inline void thread_unregister_notifier(struct notifier_block *n)
24 {
25 	extern struct atomic_notifier_head thread_notify_head;
26 	atomic_notifier_chain_unregister(&thread_notify_head, n);
27 }
28 
29 static inline void thread_notify(unsigned long rc, struct thread_info *thread)
30 {
31 	extern struct atomic_notifier_head thread_notify_head;
32 	atomic_notifier_call_chain(&thread_notify_head, rc, thread);
33 }
34 
35 #endif
36 
37 /*
38  * These are the reason codes for the thread notifier.
39  */
40 #define THREAD_NOTIFY_FLUSH	0
41 #define THREAD_NOTIFY_EXIT	1
42 #define THREAD_NOTIFY_SWITCH	2
43 #define THREAD_NOTIFY_COPY	3
44 
45 #endif
46 #endif
47