[for-next,13/17] coresight: Mark stm_generic_packet() with notrace

Message ID 20161123153529.309686434@goodmis.org
State Accepted
Commit dea5d0e1fcac657ea0d699afb1595e52cb051d46
Headers show

Commit Message

Steven Rostedt Nov. 23, 2016, 3:35 p.m.
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/1479715043-6534-4-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/coresight/coresight-stm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

-- 
2.10.2

Patch

diff --git a/drivers/hwtracing/coresight/coresight-stm.c b/drivers/hwtracing/coresight/coresight-stm.c
index 49e0f1b925a5..b7543bd19c9e 100644
--- a/drivers/hwtracing/coresight/coresight-stm.c
+++ b/drivers/hwtracing/coresight/coresight-stm.c
@@ -406,7 +406,7 @@  static long stm_generic_set_options(struct stm_data *stm_data,
 	return 0;
 }
 
-static ssize_t stm_generic_packet(struct stm_data *stm_data,
+static ssize_t notrace stm_generic_packet(struct stm_data *stm_data,
 				  unsigned int master,
 				  unsigned int channel,
 				  unsigned int packet,