release/src-rt-6.x.4708/linux/linux-2.6.36/arch/arm/include/asm/thread_notify.h

   1 /*
   2  *  arch/arm/include/asm/thread_notify.h
   3  *
   4  *  Copyright (C) 2006 Russell King.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10 #ifndef ASMARM_THREAD_NOTIFY_H
  11 #define ASMARM_THREAD_NOTIFY_H
  12
  13 #ifdef __KERNEL__
  14
  15 #ifndef __ASSEMBLY__
  16
  17 #include <linux/notifier.h>
  18 #include <asm/thread_info.h>
  19
  20 static inline int thread_register_notifier(struct notifier_block *n)
  21 {
  22         extern struct atomic_notifier_head thread_notify_head;
  23         return atomic_notifier_chain_register(&thread_notify_head, n);
  24 }
  25
  26 static inline void thread_unregister_notifier(struct notifier_block *n)
  27 {
  28         extern struct atomic_notifier_head thread_notify_head;
  29         atomic_notifier_chain_unregister(&thread_notify_head, n);
  30 }
  31
  32 static inline void thread_notify(unsigned long rc, struct thread_info *thread)
  33 {
  34         extern struct atomic_notifier_head thread_notify_head;
  35         atomic_notifier_call_chain(&thread_notify_head, rc, thread);
  36 }
  37
  38 #endif
  39
  40 /*
  41  * These are the reason codes for the thread notifier.
  42  */
  43 #define THREAD_NOTIFY_FLUSH     0
  44 #define THREAD_NOTIFY_EXIT      1
  45 #define THREAD_NOTIFY_SWITCH    2
  46
  47 #endif
  48 #endif