X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=arch%2Fs390%2FMakefile;h=74ef57dcfa60b5bb9527d6651440995851aa9ebd;hb=2e8a538d865de0eb9813c8a0f2284e920299c0cc;hp=b3791fb094a82e88354d59b571dd9134ca1964a4;hpb=37224470c8c6d90a4062e76a08d4dc1fcf91fc89;p=linux-2.6

diff --git a/arch/s390/Makefile b/arch/s390/Makefile
index b3791fb094..74ef57dcfa 100644
--- a/arch/s390/Makefile
+++ b/arch/s390/Makefile
@@ -34,6 +34,11 @@ cflags-$(CONFIG_MARCH_G5)   += $(call cc-option,-march=g5)
 cflags-$(CONFIG_MARCH_Z900) += $(call cc-option,-march=z900)
 cflags-$(CONFIG_MARCH_Z990) += $(call cc-option,-march=z990)
 
+#
+# Prevent tail-call optimizations, to get clearer backtraces:
+#
+cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
+
 # old style option for packed stacks
 ifeq ($(call cc-option-yn,-mkernel-backchain),y)
 cflags-$(CONFIG_PACK_STACK)  += -mkernel-backchain -D__PACK_STACK