Commit 9e6e0d5f authored Jun 24, 2017 by Bjørn Forsman Committed by Masahiro Yamada Jul 03, 2017

kbuild: create deterministic initramfs directory listings



kbuild runs "find" on each entry in CONFIG_INITRAMFS_SOURCE that is a
directory. The order of the file listing output by "find" matter for
build reproducability, hence this patch applies "sort" to get
deterministic results.

Without this patch, two different machines with identical initramfs
directory input may produce differing initramfs cpio archives (different
hash) due to the different order of the files within the archive.

Signed-off-by: Bjørn Forsman <bjorn.forsman@gmail.com>
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

parent adcc3f7c

scripts/gen_initramfs_list.sh

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -174,7 +174,7 @@ dir_filelist() {
	${dep_list}header "$1"		${dep_list}header "$1"

	srcdir=$(echo "$1" \| sed -e 's://*:/:g')		srcdir=$(echo "$1" \| sed -e 's://*:/:g')
	dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n")		dirlist=$(find "${srcdir}" -printf "%p %m %U %G\n" \| sort)

	# If $dirlist is only one line, then the directory is empty		# If $dirlist is only one line, then the directory is empty
	if [ "$(echo "${dirlist}" \| wc -l)" -gt 1 ]; then		if [ "$(echo "${dirlist}" \| wc -l)" -gt 1 ]; then