tracing: Add __per_cpu annotation to trace array percpu data pointer

With the conversion of the data array to per cpu, sparse now complains
about the use of per_cpu_ptr() on the variable. But The variable is
allocated with alloc_percpu() and is fine to use. But since the structure
that contains the data variable does not annotate it as such, sparse
gives out a lot of false warnings.

Reported-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index e420f2a..6728a24 100644 (file)
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -198,7 +198,7 @@ struct trace_array {
        struct list_head        systems;
        struct list_head        events;
        struct task_struct      *waiter;
-       struct trace_array_cpu  *data;
+       struct trace_array_cpu __percpu *data;
 };
 
 enum {