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| author | Dave Martin <dave.martin@linaro.org> | 2013-02-11 14:39:19 +0000 |
|---|---|---|
| committer | Nicolas Pitre <nicolas.pitre@linaro.org> | 2013-05-13 19:03:41 -0400 |
| commit | de2773b359751f6abf40b1112b07c1d1da26e786 (patch) | |
| tree | d08068bfcd626e323f80b5eb5e5b96ce51ed5f27 | |
| parent | 56e453ef248c69627f35c7c901838398a4f8bdd4 (diff) | |
| download | linaro-lsk-de2773b359751f6abf40b1112b07c1d1da26e786.tar.gz | |
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: Dave Martin <dave.martin@linaro.org>
| -rw-r--r-- | arch/arm/common/bL_switcher.c | 3 | ||||
| -rw-r--r-- | arch/arm/include/asm/bL_switcher.h | 3 |
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm/common/bL_switcher.c b/arch/arm/common/bL_switcher.c index b878e6f6dd5..1506bf536d1 100644 --- a/arch/arm/common/bL_switcher.c +++ b/arch/arm/common/bL_switcher.c @@ -464,7 +464,7 @@ static void bL_switcher_trace_trigger_cpu(void *__always_unused info) trace_cpu_migrate_current(get_ns(), read_mpidr() & MPIDR_HWID_BITMASK); } -static int bL_switcher_trace_trigger(void) +int bL_switcher_trace_trigger(void) { int ret; @@ -477,6 +477,7 @@ static int bL_switcher_trace_trigger(void) return ret; } +EXPORT_SYMBOL_GPL(bL_switcher_trace_trigger); static int bL_switcher_enable(void) { diff --git a/arch/arm/include/asm/bL_switcher.h b/arch/arm/include/asm/bL_switcher.h index 914739d17e3..d60e77d179a 100644 --- a/arch/arm/include/asm/bL_switcher.h +++ b/arch/arm/include/asm/bL_switcher.h @@ -46,6 +46,8 @@ 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) { @@ -59,6 +61,7 @@ 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 |