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[for-next,15/17] stm dummy: Mark dummy_stm_packet() with notrace

Message ID 20161123153529.650476782@goodmis.org
State Accepted
Commit 9b5e3ff6b9baa77548c6cb832780162055733c67
Headers show

Commit Message

Steven Rostedt Nov. 23, 2016, 3:35 p.m. UTC
From: Chunyan Zhang <zhang.chunyan@linaro.org>

If CONFIG_STM_SOURCE_FTRACE is selected, Function trace data can be
writen to sink via STM, all functions that related to writing data
packets to STM should be marked 'notrace' to avoid being traced by
Ftrace, otherwise the program would stall into an endless loop.

Link: http://lkml.kernel.org/r/1479715043-6534-6-git-send-email-zhang.chunyan@linaro.org

Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org>

Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

 drivers/hwtracing/stm/dummy_stm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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diff --git a/drivers/hwtracing/stm/dummy_stm.c b/drivers/hwtracing/stm/dummy_stm.c
index a86612d989f9..c5f94ca31c4d 100644
--- a/drivers/hwtracing/stm/dummy_stm.c
+++ b/drivers/hwtracing/stm/dummy_stm.c
@@ -21,7 +21,7 @@ 
 #include <linux/slab.h>
 #include <linux/stm.h>
-static ssize_t
+static ssize_t notrace
 dummy_stm_packet(struct stm_data *stm_data, unsigned int master,
 		 unsigned int channel, unsigned int packet, unsigned int flags,
 		 unsigned int size, const unsigned char *payload)