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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: Chunyan Zhang <zhang.chunyan@linaro.org>
Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Chunyan Zhang 2016-11-21 15:57:21 +08:00 committed by Steven Rostedt
parent dea5d0e1fc
commit 22975be20f
1 changed files with 7 additions and 4 deletions
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11
drivers/hwtracing/intel_th/sth.c
View File

@ -67,10 +67,13 @@ 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,
const unsigned char *payload)
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);
struct intel_th_channel __iomem *out =