[S390] ftrace: function tracer backend for s390
This implements just the basic function tracer (_mcount) backend for s390.
The dynamic variant will come later.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 90ba5d3..e6efc12 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -74,6 +74,7 @@
config S390
def_bool y
select USE_GENERIC_SMP_HELPERS if SMP
+ select HAVE_FUNCTION_TRACER
select HAVE_OPROFILE
select HAVE_KPROBES
select HAVE_KRETPROBES