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Commit 29064b88 authored by Dave Martin's avatar Dave Martin Committed by Nicolas Pitre
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ARM: bL_switcher/trace: Add kernel trace trigger interface 



This patch exports a bL_switcher_trace_trigger() function to
provide a means for drivers using the trace events to get the
current status when starting a trace session.

Calling this function is equivalent to pinging the trace_trigger
file in sysfs.

Signed-off-by: default avatarDave Martin <dave.martin@linaro.org>
parent b09bbe5b

arch/arm/common/bL_switcher.c

+2 −1
Original line number Diff line number Diff line
@@ -537,7 +537,7 @@ static void bL_switcher_trace_trigger_cpu(void *__always_unused info) 
	trace_cpu_migrate_current(get_ns(), read_mpidr());

}



static int bL_switcher_trace_trigger(void)

int bL_switcher_trace_trigger(void)

{

	int ret;
@@ -550,6 +550,7 @@ static int bL_switcher_trace_trigger(void) 


	return ret;

}

EXPORT_SYMBOL_GPL(bL_switcher_trace_trigger);



static int bL_switcher_enable(void)

{

arch/arm/include/asm/bL_switcher.h

+3 −0
Original line number Diff line number Diff line
@@ -54,6 +54,8 @@ int bL_switcher_unregister_notifier(struct notifier_block *nb); 
bool bL_switcher_get_enabled(void);

void bL_switcher_put_enabled(void);



int bL_switcher_trace_trigger(void);



#else

static inline int bL_switcher_register_notifier(struct notifier_block *nb)

{
@@ -67,6 +69,7 @@ static inline int bL_switcher_unregister_notifier(struct notifier_block *nb) 


static inline bool bL_switcher_get_enabled(void) { return false; }

static inline void bL_switcher_put_enabled(void) { }

static inline int bL_switcher_trace_trigger(void) { return 0; }

#endif /* CONFIG_BL_SWITCHER */



#endif