Merge branch 'perf-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git...

[firefly-linux-kernel-4.4.55.git] / arch / arm / kernel / stacktrace.c

diff --git a/arch/arm/kernel/stacktrace.c b/arch/arm/kernel/stacktrace.c
index 5a80ddfe7031aea97ae5c347a20ceccb80ae97fa..f065eb05d254ab89fadf1fcde45ce82e99fda0e8 100644 (file)
--- a/arch/arm/kernel/stacktrace.c
+++ b/arch/arm/kernel/stacktrace.c
@@ -149,6 +149,25 @@ static noinline void __save_stack_trace(struct task_struct *tsk,
                trace->entries[trace->nr_entries++] = ULONG_MAX;
 }
 
+void save_stack_trace_regs(struct pt_regs *regs, struct stack_trace *trace)
+{
+       struct stack_trace_data data;
+       struct stackframe frame;
+
+       data.trace = trace;
+       data.skip = trace->skip;
+       data.no_sched_functions = 0;
+
+       frame.fp = regs->ARM_fp;
+       frame.sp = regs->ARM_sp;
+       frame.lr = regs->ARM_lr;
+       frame.pc = regs->ARM_pc;
+
+       walk_stackframe(&frame, save_trace, &data);
+       if (trace->nr_entries < trace->max_entries)
+               trace->entries[trace->nr_entries++] = ULONG_MAX;
+}
+
 void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
 {
        __save_stack_trace(tsk, trace, 1);