From 5606330627ab680f5e6b7549d14ec3ffdae58c15 Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Mon, 2 May 2016 14:38:29 +0200 Subject: s390/dumpstack: implement and use return_address() Implement return_address() and use it instead of __builtin_return_address(n). __builtin_return_address(n) is not guaranteed to work for n > 0, therefore implement a private return_address() function which walks the stack frames and returns the proper return address. This way we get also rid of a compile warning which gcc 6.1 emits and look like all other architectures. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/include/asm/ftrace.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) (limited to 'arch/s390/include/asm/ftrace.h') diff --git a/arch/s390/include/asm/ftrace.h b/arch/s390/include/asm/ftrace.h index 836c56290499..64053d9ac3f2 100644 --- a/arch/s390/include/asm/ftrace.h +++ b/arch/s390/include/asm/ftrace.h @@ -12,7 +12,9 @@ #ifndef __ASSEMBLY__ -#define ftrace_return_address(n) __builtin_return_address(n) +unsigned long return_address(int depth); + +#define ftrace_return_address(n) return_address(n) void _mcount(void); void ftrace_caller(void); -- cgit v1.2.3-59-g8ed1b