Linux 2.6.31 Release for Digi ConnectCore Wi-i.MX boards2.6.31-digi-201102101717

1 files changed, 16 insertions, 0 deletions

diff --git a/kernel/fork.c b/kernel/fork.c
index e6c04d462ab2..4c21988d6195 100644
--- a/kernel/fork.c
+++ b/kernel/fork.c
@@ -136,6 +136,9 @@ struct kmem_cache *vm_area_cachep;
 /* SLAB cache for mm_struct structures (tsk->mm) */
 static struct kmem_cache *mm_cachep;
 
+/* Notifier list called when a task struct is freed */
+static ATOMIC_NOTIFIER_HEAD(task_free_notifier);
+
 void free_task(struct task_struct *tsk)
 {
 	prop_local_destroy_single(&tsk->dirties);
@@ -146,6 +149,18 @@ void free_task(struct task_struct *tsk)
 }
 EXPORT_SYMBOL(free_task);
 
+int task_free_register(struct notifier_block *n)
+{
+	return atomic_notifier_chain_register(&task_free_notifier, n);
+}
+EXPORT_SYMBOL(task_free_register);
+
+int task_free_unregister(struct notifier_block *n)
+{
+	return atomic_notifier_chain_unregister(&task_free_notifier, n);
+}
+EXPORT_SYMBOL(task_free_unregister);
+
 void __put_task_struct(struct task_struct *tsk)
 {
 	WARN_ON(!tsk->exit_state);
@@ -156,6 +171,7 @@ void __put_task_struct(struct task_struct *tsk)
 	put_cred(tsk->cred);
 	delayacct_tsk_free(tsk);
 
+	atomic_notifier_call_chain(&task_free_notifier, 0, tsk);
 	if (!profile_handoff_task(tsk))
 		free_task(tsk);
 }