[for-next][PATCH 4/4] tracing: Fix check of ftrace_trace_arrays list_empty() check

[Steven Rostedt]

From: "Steven Rostedt (Red Hat)" <rostedt@xxxxxxxxxxx>

The check that tests if ftrace_trace_arrays is empty in
top_trace_array(), uses the .prev pointer:

  if (list_empty(ftrace_trace_arrays.prev))

instead of testing the variable itself:

  if (list_empty(&ftrace_trace_arrays))

Although it is technically correct, it is awkward and confusing.
Use the proper method.

Link: http://lkml.kernel.org/r/87oay1bas8.fsf@xxxxxxxxxxxxxxxxxx

Reported-by: Namhyung Kim <namhyung@xxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 kernel/trace/trace.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 9e82551dd566..9258f5a815db 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -252,7 +252,7 @@ static inline struct trace_array *top_trace_array(void)
 {
 	struct trace_array *tr;
 
-	if (list_empty(ftrace_trace_arrays.prev))
+	if (list_empty(&ftrace_trace_arrays))
 		return NULL;
 
 	tr = list_entry(ftrace_trace_arrays.prev,
-- 
2.0.0.rc2


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