1 files changed, 16 insertions, 37 deletions

diff --git a/kernel/profile.c b/kernel/profile.c
index ad81f799a9b4..5a730fdb1a2c 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -87,72 +87,52 @@ void __init profile_init(void)
  
 #ifdef CONFIG_PROFILING
  
-static DECLARE_RWSEM(profile_rwsem);
-static DEFINE_RWLOCK(handoff_lock);
-static struct notifier_block * task_exit_notifier;
-static struct notifier_block * task_free_notifier;
-static struct notifier_block * munmap_notifier;
+static BLOCKING_NOTIFIER_HEAD(task_exit_notifier);
+static ATOMIC_NOTIFIER_HEAD(task_free_notifier);
+static BLOCKING_NOTIFIER_HEAD(munmap_notifier);
  
 void profile_task_exit(struct task_struct * task)
 {
-        down_read(&profile_rwsem);
-        notifier_call_chain(&task_exit_notifier, 0, task);
-        up_read(&profile_rwsem);
+        blocking_notifier_call_chain(&task_exit_notifier, 0, task);
 }
  
 int profile_handoff_task(struct task_struct * task)
 {
         int ret;
-        read_lock(&handoff_lock);
-        ret = notifier_call_chain(&task_free_notifier, 0, task);
-        read_unlock(&handoff_lock);
+        ret = atomic_notifier_call_chain(&task_free_notifier, 0, task);
         return (ret == NOTIFY_OK) ? 1 : 0;
 }
 
 void profile_munmap(unsigned long addr)
 {
-        down_read(&profile_rwsem);
-        notifier_call_chain(&munmap_notifier, 0, (void *)addr);
-        up_read(&profile_rwsem);
+        blocking_notifier_call_chain(&munmap_notifier, 0, (void *)addr);
 }
 
 int task_handoff_register(struct notifier_block * n)
 {
-        int err = -EINVAL;
-
-        write_lock(&handoff_lock);
-        err = notifier_chain_register(&task_free_notifier, n);
-        write_unlock(&handoff_lock);
-        return err;
+        return atomic_notifier_chain_register(&task_free_notifier, n);
 }
 
 int task_handoff_unregister(struct notifier_block * n)
 {
-        int err = -EINVAL;
-
-        write_lock(&handoff_lock);
-        err = notifier_chain_unregister(&task_free_notifier, n);
-        write_unlock(&handoff_lock);
-        return err;
+        return atomic_notifier_chain_unregister(&task_free_notifier, n);
 }
 
 int profile_event_register(enum profile_type type, struct notifier_block * n)
 {
         int err = -EINVAL;
  
-        down_write(&profile_rwsem);
- 
         switch (type) {
                 case PROFILE_TASK_EXIT:
-                        err = notifier_chain_register(&task_exit_notifier, n);
+                        err = blocking_notifier_chain_register(
+                                        &task_exit_notifier, n);
                         break;
                 case PROFILE_MUNMAP:
-                        err = notifier_chain_register(&munmap_notifier, n);
+                        err = blocking_notifier_chain_register(
+                                        &munmap_notifier, n);
                         break;
         }
  
-        up_write(&profile_rwsem);
- 
         return err;
 }
 
@@ -161,18 +141,17 @@ int profile_event_unregister(enum profile_type type, struct notifier_block * n)
 {
         int err = -EINVAL;
  
-        down_write(&profile_rwsem);
- 
         switch (type) {
                 case PROFILE_TASK_EXIT:
-                        err = notifier_chain_unregister(&task_exit_notifier, n);
+                        err = blocking_notifier_chain_unregister(
+                                        &task_exit_notifier, n);
                         break;
                 case PROFILE_MUNMAP:
-                        err = notifier_chain_unregister(&munmap_notifier, n);
+                        err = blocking_notifier_chain_unregister(
+                                        &munmap_notifier, n);
                         break;
         }
 
-        up_write(&profile_rwsem);
         return err;
 }