From 78c98f9074135d3dab4e39544e0a537f92388fce Mon Sep 17 00:00:00 2001
From: Martin Schwidefsky <schwidefsky@de.ibm.com>
Date: Mon, 28 Jan 2019 08:33:08 +0100
Subject: s390/unwind: introduce stack unwind API

Rework the dump_trace() stack unwinder interface to support different
unwinding algorithms. The new interface looks like this:

	struct unwind_state state;
	unwind_for_each_frame(&state, task, regs, start_stack)
		do_something(state.sp, state.ip, state.reliable);

The unwind_bc.c file contains the implementation for the classic
back-chain unwinder.

One positive side effect of the new code is it now handles ftraced
functions gracefully. It prints the real name of the return function
instead of 'return_to_handler'.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---
 arch/s390/kernel/setup.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/s390/kernel/setup.c')

diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 64e4bc9dd130..f8544d517430 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -66,6 +66,7 @@
 #include <asm/diag.h>
 #include <asm/os_info.h>
 #include <asm/sclp.h>
+#include <asm/stacktrace.h>
 #include <asm/sysinfo.h>
 #include <asm/numa.h>
 #include <asm/alternative.h>
-- 
cgit 1.4.1