perf_events: Undo copy/paste damage

We had two almost identical functions, avoid the duplication.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <20091123103819.537537928@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

diff --git a/kernel/perf_event.c b/kernel/perf_event.c
index 20df8aba8da532de83445f98248612647f3521e2..e2daa10bb5ce78c4e30bfd10d284a2e9c7defeda 100644 (file)
--- a/kernel/perf_event.c
+++ b/kernel/perf_event.c
@@ -1704,16 +1704,10 @@ static void free_event(struct perf_event *event)
        call_rcu(&event->rcu_head, free_event_rcu);
 }
 
-/*
- * Called when the last reference to the file is gone.
- */
-static int perf_release(struct inode *inode, struct file *file)
+int perf_event_release_kernel(struct perf_event *event)
 {
-       struct perf_event *event = file->private_data;
        struct perf_event_context *ctx = event->ctx;
 
-       file->private_data = NULL;
-
        WARN_ON_ONCE(ctx->parent_ctx);
        mutex_lock(&ctx->mutex);
        perf_event_remove_from_context(event);
@@ -1728,26 +1722,19 @@ static int perf_release(struct inode *inode, struct file *file)
 
        return 0;
 }
+EXPORT_SYMBOL_GPL(perf_event_release_kernel);
 
-int perf_event_release_kernel(struct perf_event *event)
+/*
+ * Called when the last reference to the file is gone.
+ */
+static int perf_release(struct inode *inode, struct file *file)
 {
-       struct perf_event_context *ctx = event->ctx;
-
-       WARN_ON_ONCE(ctx->parent_ctx);
-       mutex_lock(&ctx->mutex);
-       perf_event_remove_from_context(event);
-       mutex_unlock(&ctx->mutex);
-
-       mutex_lock(&event->owner->perf_event_mutex);
-       list_del_init(&event->owner_entry);
-       mutex_unlock(&event->owner->perf_event_mutex);
-       put_task_struct(event->owner);
+       struct perf_event *event = file->private_data;
 
-       free_event(event);
+       file->private_data = NULL;
 
-       return 0;
+       return perf_event_release_kernel(event);
 }
-EXPORT_SYMBOL_GPL(perf_event_release_kernel);
 
 static int perf_event_read_size(struct perf_event *event)
 {