From de2773b359751f6abf40b1112b07c1d1da26e786 Mon Sep 17 00:00:00 2001 From: Dave Martin Date: Mon, 11 Feb 2013 14:39:19 +0000 Subject: 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 --- arch/arm/common/bL_switcher.c | 3 ++- arch/arm/include/asm/bL_switcher.h | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-) 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 -- cgit v1.2.3