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ARM: bL_switcher/trace: Add kernel trace trigger interface

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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: Dave Martin <dave.martin@linaro.org>
This commit is contained in:
Dave Martin
2013-02-11 14:39:19 +00:00
committed by Nicolas Pitre
parent b09bbe5b12
commit 29064b8846
2 changed files with 5 additions and 1 deletions
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3
arch/arm/include/asm/bL_switcher.h
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@@ -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