From 86922e80079a788fc4d0835e192cdde4f027e246 Mon Sep 17 00:00:00 2001 From: Dustin Brown Date: Tue, 13 Jun 2017 13:54:38 -0700 Subject: arm/arm64: 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 ARM64 architecture to align with x86 and support various debugging use cases such as arbitrary driver thread watchdog timers. Change-Id: I61e9d2afc4703a786fa6dcaf82fe46c0ed250045 CRs-Fixed: 2061326 Signed-off-by: Dustin Brown --- arch/arm/kernel/stacktrace.c | 1 + 1 file changed, 1 insertion(+) (limited to 'arch/arm/kernel/stacktrace.c') diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c index 5964c77c593d..a1898c6092d1 100644 --- a/arch/arm/kernel/stacktrace.c +++ b/arch/arm/kernel/stacktrace.c @@ -175,6 +175,7 @@ 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) { -- cgit v1.2.3