cpumask: modifiy oprofile initialization

Delta patch to f7df8ed1 for
tip/cpus4096.

Moved initialization to sync_start()/sync_stop(). No changes needed in
buffer_sync.h and oprof.c anymore.
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

drivers/oprofile/buffer_sync.c

@@ -154,6 +154,10 @@ int sync_start(void)
 {
 	int err;
 
+	if (!alloc_cpumask_var(&marked_cpus, GFP_KERNEL))
+		return -ENOMEM;
+	cpumask_clear(marked_cpus);
+
 	start_cpu_work();
 
 	err = task_handoff_register(&task_free_nb);
@@ -179,6 +183,7 @@ int sync_start(void)
 	task_handoff_unregister(&task_free_nb);
 out1:
 	end_sync();
+	free_cpumask_var(marked_cpus);
 	goto out;
 }
 
@@ -190,6 +195,7 @@ void sync_stop(void)
 	profile_event_unregister(PROFILE_TASK_EXIT, &task_exit_nb);
 	task_handoff_unregister(&task_free_nb);
 	end_sync();
+	free_cpumask_var(marked_cpus);
 }
 
 
@@ -565,20 +571,6 @@ void sync_buffer(int cpu)
 	mutex_unlock(&buffer_mutex);
 }
 
-int __init buffer_sync_init(void)
-{
-	if (!alloc_cpumask_var(&marked_cpus, GFP_KERNEL))
-		return -ENOMEM;
-
-	cpumask_clear(marked_cpus);
-		return 0;
-}
-
-void __exit buffer_sync_cleanup(void)
-{
-	free_cpumask_var(marked_cpus);
-}
-
 /* The function can be used to add a buffer worth of data directly to
  * the kernel buffer. The buffer is assumed to be a circular buffer.
  * Take the entries from index start and end at index end, wrapping

drivers/oprofile/buffer_sync.h

@@ -19,8 +19,4 @@ void sync_stop(void);
 /* sync the given CPU's buffer */
 void sync_buffer(int cpu);
 
-/* initialize/destroy the buffer system. */
-int buffer_sync_init(void);
-void buffer_sync_cleanup(void);
-
 #endif /* OPROFILE_BUFFER_SYNC_H */

drivers/oprofile/oprof.c

@@ -183,10 +183,6 @@ static int __init oprofile_init(void)
 {
 	int err;
 
-	err = buffer_sync_init();
-	if (err)
-		return err;
-
 	err = oprofile_arch_init(&oprofile_ops);
 
 	if (err < 0 || timer) {
@@ -195,10 +191,8 @@ static int __init oprofile_init(void)
 	}
 
 	err = oprofilefs_register();
-	if (err) {
+	if (err)
 		oprofile_arch_exit();
-		buffer_sync_cleanup();
-	}
 
 	return err;
 }
@@ -208,7 +202,6 @@ static void __exit oprofile_exit(void)
 {
 	oprofilefs_unregister();
 	oprofile_arch_exit();
-	buffer_sync_cleanup();
 }