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kpatch-build: drop support for old non-.klp.arch kernels

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There were a few kernels (4.7 and 4.8) which didn't have support for
.klp.arch sections, but for which we still tried to use
CONFIG_LIVEPATCH.  Those are inherently buggy, so just drop
CONFIG_LIVEPATCH support for them altogether.

Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
This commit is contained in:
Josh Poimboeuf 2020-04-14 10:14:30 -05:00
parent e80562a8cb
commit 3982b329bc
1 changed files with 2 additions and 3 deletions
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kpatch-build/kpatch-build
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@ -746,15 +746,14 @@ CONFIG_PARAVIRT=0
CONFIG_UNWINDER_ORC=0
CONFIG_JUMP_LABEL=0
if grep -q "CONFIG_LIVEPATCH=y" "$CONFIGFILE" && (kernel_is_rhel || kernel_version_gte 4.7.0); then
if grep -q "CONFIG_LIVEPATCH=y" "$CONFIGFILE" && (kernel_is_rhel || kernel_version_gte 4.9.0); then
USE_KLP=1
if kernel_is_rhel || kernel_version_gte 4.9.0; then
# TEMPORARY: always assume .klp.arch
USE_KLP_ARCH=1
KPATCH_LDFLAGS="--unique=.parainstructions --unique=.altinstructions"
CDO_FLAGS="--klp-arch"
fi
else
# No support for livepatch in the kernel. Kpatch core module is needed.