linux-kernel - [PATCH V2 3/4] trace: duplicate function pointer to STM

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Date:	Wed, 22 Jun 2016 10:46:52 +0800
From:	Chunyan Zhang <zhang.chunyan@...aro.org>
To:	rostedt@...dmis.org, mathieu.poirier@...aro.org,
	alexander.shishkin@...ux.intel.com, mingo@...hat.com
Cc:	mike.leach@....com, tor@...com, maxime.coquelin@...com,
	philippe.langlais@...com, nicolas.guion@...com,
	zhang.lyra@...il.com, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org
Subject: [PATCH V2 3/4] trace: duplicate function pointer to STM

This patch inserts an output from Ftrace to STM, logs the pointer of
the functions and their parents to STM.

Signed-off-by: Chunyan Zhang <zhang.chunyan@...aro.org>
---
 kernel/trace/trace.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 8a4bd6b..ed9e1b4 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -41,6 +41,7 @@
 #include <linux/nmi.h>
 #include <linux/fs.h>
 #include <linux/sched/rt.h>
+#include <linux/trace_output_stm.h>
 
 #include "trace.h"
 #include "trace_output.h"
@@ -1884,8 +1885,10 @@ trace_function(struct trace_array *tr,
 	entry->ip			= ip;
 	entry->parent_ip		= parent_ip;
 
-	if (!call_filter_check_discard(call, entry, buffer, event))
+	if (!call_filter_check_discard(call, entry, buffer, event)) {
 		__buffer_unlock_commit(buffer, event);
+		trace_func_to_stm(ip, parent_ip);
+	}
 }
 
 #ifdef CONFIG_STACKTRACE
-- 
1.9.1