From 9a3dc3186fc3795e076a4122da9e0258651a9631 Mon Sep 17 00:00:00 2001 From: Dustin Brown Date: Mon, 7 Aug 2017 19:44:01 +0100 Subject: [PATCH] ARM: 8691/1: Export save_stack_trace_tsk() The kernel watchdog is a great debugging tool for finding tasks that consume a disproportionate amount of CPU time in contiguous chunks. One can imagine building a similar watchdog for arbitrary driver threads using save_stack_trace_tsk() and print_stack_trace(). However, this is not viable for dynamically loaded driver modules on ARM platforms because save_stack_trace_tsk() is not exported for those architectures. Export save_stack_trace_tsk() for the ARM architecture to align with x86 and support various debugging use cases such as arbitrary driver thread watchdog timers. Signed-off-by: Dustin Brown Signed-off-by: Russell King --- arch/arm/kernel/stacktrace.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c index 3a2fa203637a..65228bf4c6df 100644 --- a/arch/arm/kernel/stacktrace.c +++ b/arch/arm/kernel/stacktrace.c @@ -171,6 +171,7 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace) { __save_stack_trace(tsk, trace, 1); } +EXPORT_SYMBOL(save_stack_trace_tsk); void save_stack_trace(struct stack_trace *trace) { -- 2.20.1