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objtool/klp: Only enable --checksum when needed

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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>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mhklinux@outlook.com>
Link: https://patch.msgid.link/edbb1ca215e4926e02edb493b68b9d6d063e902f.1762990139.git.jpoimboe@kernel.org
This commit is contained in:
Josh Poimboeuf
2025-11-12 15:32:34 -08:00
committed by Peter Zijlstra
parent ee0b48faba
commit 2092007aa3
3 changed files with 5 additions and 2 deletions
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4
scripts/livepatch/klp-build
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@@ -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")