ftrace: fix locking
we can hold all cpu trace buffer locks at once - put each into a
separate lock class.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 29a7ea5..b040835 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -56,6 +56,7 @@
struct list_head trace_pages;
atomic_t disabled;
spinlock_t lock;
+ struct lock_class_key lock_key;
cycle_t time_offset;
/* these fields get copied into max-trace: */