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authorVasily Gorbik <gor@linux.ibm.com>2018-08-06 15:17:44 +0200
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2021-02-23 13:58:13 +0100
commit224eb56468fe677de39f03df3360bc50cfe0c1df (patch)
tree308429736539a6cb125c6653db2e12b38456be04 /scripts
parent61ff0a8d64b09c6f4e549f78101c2d64a101988b (diff)
tracing: Avoid calling cc-option -mrecord-mcount for every Makefile
commit 07d0408120216b60625c9a5b8012d1c3a907984d upstream. Currently if CONFIG_FTRACE_MCOUNT_RECORD is enabled -mrecord-mcount compiler flag support is tested for every Makefile. Top 4 cc-option usages: 511 -mrecord-mcount 11 -fno-stack-protector 9 -Wno-override-init 2 -fsched-pressure To address that move cc-option from scripts/Makefile.build to top Makefile and export CC_USING_RECORD_MCOUNT to be used in original place. While doing that also add -mrecord-mcount to CC_FLAGS_FTRACE (if gcc actually supports it). Link: http://lkml.kernel.org/r/patch-2.thread-aa7b8d.git-de935bace15a.your-ad-here.call-01533557518-ext-9465@work.hours Acked-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'scripts')
-rw-r--r--scripts/Makefile.build9
1 files changed, 3 insertions, 6 deletions
diff --git a/scripts/Makefile.build b/scripts/Makefile.build
index 89dbb2cb5f07..6de137a28a12 100644
--- a/scripts/Makefile.build
+++ b/scripts/Makefile.build
@@ -221,11 +221,8 @@ cmd_modversions_c = \
endif
ifdef CONFIG_FTRACE_MCOUNT_RECORD
-# gcc 5 supports generating the mcount tables directly
-ifneq ($(call cc-option,-mrecord-mcount,y),y)
-KBUILD_CFLAGS += -mrecord-mcount
-else
-# else do it all manually
+ifndef CC_USING_RECORD_MCOUNT
+# compiler will not generate __mcount_loc use recordmcount or recordmcount.pl
ifdef BUILD_C_RECORDMCOUNT
ifeq ("$(origin RECORDMCOUNT_WARN)", "command line")
RECORDMCOUNT_FLAGS = -w
@@ -254,7 +251,7 @@ cmd_record_mcount = \
"$(CC_FLAGS_FTRACE)" ]; then \
$(sub_cmd_record_mcount) \
fi;
-endif # -record-mcount
+endif # CC_USING_RECORD_MCOUNT
endif
define rule_cc_o_c