kpatch/0008-livepatch-patch-hook-support-no-active-after-load.patch

From 3d3cb8c0b294a60faaeb68e0d7361babdc1b8902 Mon Sep 17 00:00:00 2001
From: Zhipeng Xie <xiezhipeng1@huawei.com>
Date: Tue, 25 Feb 2020 23:40:37 -0500
Subject: [PATCH 08/24] livepatch-patch-hook: support no active after load

suppport Don't active patch after loading the patch when
DISABLE_AFTER_LOAD is set.

Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com>
---
 kmod/patch/livepatch-patch-hook.c | 2 ++
 kpatch-build/kpatch-build         | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/kmod/patch/livepatch-patch-hook.c b/kmod/patch/livepatch-patch-hook.c
index 3d13ab9..b578ef3 100644
--- a/kmod/patch/livepatch-patch-hook.c
+++ b/kmod/patch/livepatch-patch-hook.c
@@ -576,6 +576,7 @@ static int __init patch_init(void)
 	}
 #endif
 
+#if !defined(DISABLE_AFTER_LOAD)
 	ret = klp_enable_patch(lpatch);
 	if (ret) {
 #ifndef HAVE_SIMPLE_ENABLE
@@ -584,6 +585,7 @@ static int __init patch_init(void)
 		patch_free_livepatch(lpatch);
 		return ret;
 	}
+#endif
 
 	return 0;
 out:
diff --git a/kpatch-build/kpatch-build b/kpatch-build/kpatch-build
index ad3a079..c85e05a 100755
--- a/kpatch-build/kpatch-build
+++ b/kpatch-build/kpatch-build
@@ -1176,6 +1176,11 @@ export KCFLAGS="-I$DATADIR/patch $ARCH_KCFLAGS"
 if [[ "$USE_KLP" -eq 0 ]]; then
 	export KCPPFLAGS="-D__KPATCH_MODULE__"
 fi
+
+if [[ -n "$DISABLE_AFTER_LOAD" ]];then
+	export KCPPFLAGS="-DDISABLE_AFTER_LOAD $KCPPFLAGS"
+fi
+
 save_env
 
 echo "Building patch module: $MODNAME.ko"
-- 
2.23.0