diff options
Diffstat (limited to 'kernel/fork.c')
| -rw-r--r-- | kernel/fork.c | 16 |
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); } |