With CONFIG_KLP_BUILD enabled, checksums are only needed during a
klp-build run. There's no need to enable them for normal kernel builds.
This also has the benefit of softening the xxhash dependency.
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
---
arch/x86/boot/startup/Makefile | 2 +-
scripts/Makefile.lib | 1 -
scripts/livepatch/klp-build | 4 ++++
3 files changed, 5 insertions(+), 2 deletions(-)
diff --git a/arch/x86/boot/startup/Makefile b/arch/x86/boot/startup/Makefile
index e8fdf020b422..5e499cfb29b5 100644
--- a/arch/x86/boot/startup/Makefile
+++ b/arch/x86/boot/startup/Makefile
@@ -36,7 +36,7 @@ $(patsubst %.o,$(obj)/%.o,$(lib-y)): OBJECT_FILES_NON_STANDARD := y
# relocations, even if other objtool actions are being deferred.
#
$(pi-objs): objtool-enabled = 1
-$(pi-objs): objtool-args = $(if $(delay-objtool),,$(objtool-args-y)) --noabs
+$(pi-objs): objtool-args = $(if $(delay-objtool),--dry-run,$(objtool-args-y)) --noabs
#
# Confine the startup code by prefixing all symbols with __pi_ (for position
diff --git a/scripts/Makefile.lib b/scripts/Makefile.lib
index f4b33919ec37..28a1c08e3b22 100644
--- a/scripts/Makefile.lib
+++ b/scripts/Makefile.lib
@@ -173,7 +173,6 @@ ifdef CONFIG_OBJTOOL
objtool := $(objtree)/tools/objtool/objtool
-objtool-args-$(CONFIG_KLP_BUILD) += --checksum
objtool-args-$(CONFIG_HAVE_JUMP_LABEL_HACK) += --hacks=jump_label
objtool-args-$(CONFIG_HAVE_NOINSTR_HACK) += --hacks=noinstr
objtool-args-$(CONFIG_MITIGATION_CALL_DEPTH_TRACKING) += --hacks=skylake
diff --git a/scripts/livepatch/klp-build b/scripts/livepatch/klp-build
index 881e052e7fae..882272120c9e 100755
--- a/scripts/livepatch/klp-build
+++ b/scripts/livepatch/klp-build
@@ -489,8 +489,11 @@ clean_kernel() {
build_kernel() {
local log="$TMP_DIR/build.log"
+ local objtool_args=()
local cmd=()
+ objtool_args=("--checksum")
+
cmd=("make")
# When a patch to a kernel module references a newly created unexported
@@ -513,6 +516,7 @@ build_kernel() {
cmd+=("$VERBOSE")
cmd+=("-j$JOBS")
cmd+=("KCFLAGS=-ffunction-sections -fdata-sections")
+ cmd+=("OBJTOOL_ARGS=${objtool_args[*]}")
cmd+=("vmlinux")
cmd+=("modules")
--
2.51.1