livepatch/klp-build: Introduce klp-build script for generating livepatch modules

Add a klp-build script which automates the generation of a livepatch
module from a source .patch file by performing the following steps:

  - Builds an original kernel with -function-sections and
    -fdata-sections, plus objtool function checksumming.

  - Applies the .patch file and rebuilds the kernel using the same
    options.

  - Runs 'objtool klp diff' to detect changed functions and generate
    intermediate binary diff objects.

  - Builds a kernel module which links the diff objects with some
    livepatch module init code (scripts/livepatch/init.c).

  - Finalizes the livepatch module (aka work around linker wreckage)
    using 'objtool klp post-link'.

Acked-by: Petr Mladek <pmladek@suse.com>
Tested-by: Joe Lawrence <joe.lawrence@redhat.com>
Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/livepatch/fix-patch-lines b/scripts/livepatch/fix-patch-lines
index 73c5e3dea46e..fa7d4f6592e6 100755
--- a/scripts/livepatch/fix-patch-lines
+++ b/scripts/livepatch/fix-patch-lines
@@ -23,7 +23,7 @@ BEGIN {
 
 	in_hunk = 1
 
-	# for @@ -1,3 +1,4 @@:
+	# @@ -1,3 +1,4 @@:
 	#   1: line number in old file
 	#   3: how many lines the hunk covers in old file
 	#   1: line number in new file