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Commit 22975be2 authored by Chunyan Zhang's avatar Chunyan Zhang Committed by Steven Rostedt
Browse files

intel_th: Mark sth_stm_packet() with notrace 

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/1479715043-6534-5-git-send-email-zhang.chunyan@linaro.org



Signed-off-by: default avatarChunyan Zhang <zhang.chunyan@linaro.org>
Acked-by: default avatarAlexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
parent dea5d0e1

drivers/hwtracing/intel_th/sth.c

+7 −4
Original line number Diff line number Diff line
@@ -67,9 +67,12 @@ static void sth_iowrite(void __iomem *dest, const unsigned char *payload, 
	}

}



static ssize_t sth_stm_packet(struct stm_data *stm_data, unsigned int master,

			      unsigned int channel, unsigned int packet,

			      unsigned int flags, unsigned int size,

static ssize_t notrace sth_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)

{

	struct sth_device *sth = container_of(stm_data, struct sth_device, stm);