diff options
| author | Dave Martin <dave.martin@linaro.org> | 2013-02-11 18:39:19 +0400 |
|---|---|---|
| committer | Nicolas Pitre <nicolas.pitre@linaro.org> | 2013-09-24 02:47:31 +0400 |
| commit | 29064b88466ee725613db16d8c05b0ec5443a309 (patch) | |
| tree | fc0ca8234e305feaebb5599cdbff759cd12a7537 /arch/arm | |
| parent | b09bbe5b1267b6af22a9584d614f5eec5d74f405 (diff) | |
| download | linux-29064b88466ee725613db16d8c05b0ec5443a309.tar.xz | |
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>
Diffstat (limited to 'arch/arm')
| -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 f0dc025077d5..f4878a36047a 100644 --- a/arch/arm/common/bL_switcher.c +++ b/arch/arm/common/bL_switcher.c @@ -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) { diff --git a/arch/arm/include/asm/bL_switcher.h b/arch/arm/include/asm/bL_switcher.h index 7d1cce8b8a0d..8ada5a885c70 100644 --- a/arch/arm/include/asm/bL_switcher.h +++ b/arch/arm/include/asm/bL_switcher.h @@ -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 |