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| author | Vasily Gorbik | 2018-08-06 15:17:42 +0200 |
|---|---|---|
| committer | Steven Rostedt (VMware) | 2018-08-16 04:36:12 +0200 |
| commit | f28bc3c32c059ab4d13f52155fabd3e20f477f65 (patch) | |
| tree | 196907e6fa8a510241b23ce44495df9f49f096da /Makefile | |
| parent | Uprobe: Additional argument arch_uprobe to uprobe_write_opcode() (diff) | |
| download | kernel-qcow2-linux-f28bc3c32c059ab4d13f52155fabd3e20f477f65.tar.gz kernel-qcow2-linux-f28bc3c32c059ab4d13f52155fabd3e20f477f65.tar.xz kernel-qcow2-linux-f28bc3c32c059ab4d13f52155fabd3e20f477f65.zip | |
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-- | Makefile | 11 |
1 files changed, 7 insertions, 4 deletions
@@ -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 |