tracing: Kill trace_array->waiter

Trivial. trace_array->waiter has no users since 6eaaa5d5
"tracing/core: use appropriate waiting on trace_pipe".

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Oleg Nesterov <[email protected]>
Signed-off-by: Steven Rostedt <[email protected]>

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 57b7bb0d39b7e223573f6e8734c787b942bb407c..e7d643b8a907d6dbd027c723115b3d5a21dc9c9e 100644 (file)
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -214,7 +214,6 @@ struct trace_array {
        struct dentry           *event_dir;
        struct list_head        systems;
        struct list_head        events;
-       struct task_struct      *waiter;
        int                     ref;
 };