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authorVasily Gorbik <gor@linux.ibm.com>2018-08-06 15:17:42 +0200
committerSteven Rostedt (VMware) <rostedt@goodmis.org>2018-08-15 22:36:12 -0400
commitf28bc3c32c059ab4d13f52155fabd3e20f477f65 (patch)
tree196907e6fa8a510241b23ce44495df9f49f096da /Makefile
parent6d43743e9079ac0531b60cde7eadd0f042873344 (diff)
downloadlinux-f28bc3c32c059ab4d13f52155fabd3e20f477f65.tar.gz
tracing: Handle CC_FLAGS_FTRACE more accurately
CC_FLAGS_FTRACE is exported and later used to remove ftrace relevant build flags from files which should be built without ftrace support. For that reason add -mfentry to CC_FLAGS_FTRACE as well. That fixes a problem with vdso32 build on s390, where -mfentry could not be used together with -m31 flag. At the same time flags like -pg and -mfentry are not relevant for asm files, so avoid adding them to KBUILD_AFLAGS. Introduce CC_FLAGS_USING instead of CC_USING_FENTRY to collect -DCC_USING_FENTRY (and future alike) which are relevant for both KBUILD_CFLAGS and KBUILD_AFLAGS. Link: http://lkml.kernel.org/r/patch-1.thread-aa7b8d.git-42971afe87de.your-ad-here.call-01533557518-ext-9465@work.hours Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'Makefile')
-rw-r--r--Makefile11
1 files changed, 7 insertions, 4 deletions
diff --git a/Makefile b/Makefile
index 67d9d20f8564..489de42d30c7 100644
--- a/Makefile
+++ b/Makefile
@@ -743,12 +743,15 @@ ifdef CONFIG_FUNCTION_TRACER
ifndef CC_FLAGS_FTRACE
CC_FLAGS_FTRACE := -pg
endif
-export CC_FLAGS_FTRACE
ifdef CONFIG_HAVE_FENTRY
-CC_USING_FENTRY := $(call cc-option, -mfentry -DCC_USING_FENTRY)
+ ifeq ($(call cc-option-yn, -mfentry),y)
+ CC_FLAGS_FTRACE += -mfentry
+ CC_FLAGS_USING += -DCC_USING_FENTRY
+ endif
endif
-KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_USING_FENTRY)
-KBUILD_AFLAGS += $(CC_USING_FENTRY)
+export CC_FLAGS_FTRACE
+KBUILD_CFLAGS += $(CC_FLAGS_FTRACE) $(CC_FLAGS_USING)
+KBUILD_AFLAGS += $(CC_FLAGS_USING)
ifdef CONFIG_DYNAMIC_FTRACE
ifdef CONFIG_HAVE_C_RECORDMCOUNT
BUILD_C_RECORDMCOUNT := y