Merge tag 'kbuild-fixes-v6.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Drop debug info from purgatory objects again

 - Document that kernel.org provides prebuilt LLVM toolchains

 - Give up handling untracked files for source package builds

 - Avoid creating corrupted cpio when KBUILD_BUILD_TIMESTAMP is given
   with a pre-epoch data.

 - Change panic_show_mem() to a macro to handle variable-length argument

 - Compress tarballs on-the-fly again

* tag 'kbuild-fixes-v6.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: do not create intermediate *.tar for tar packages
  kbuild: do not create intermediate *.tar for source tarballs
  kbuild: merge cmd_archive_linux and cmd_archive_perf
  init/initramfs: Fix argument forwarding to panic() in panic_show_mem()
  initramfs: Check negative timestamp to prevent broken cpio archive
  kbuild: give up untracked files for source package builds
  Documentation/llvm: Add a note about prebuilt kernel.org toolchains
  purgatory: fix disabling debug info

1 files changed, 27 insertions, 35 deletions

diff --git a/scripts/package/gen-diff-patch b/scripts/package/gen-diff-patch
index f842ab50a780..8a98b7bb78a0 100755
--- a/scripts/package/gen-diff-patch
+++ b/scripts/package/gen-diff-patch
@@ -1,44 +1,36 @@
 #!/bin/sh
 # SPDX-License-Identifier: GPL-2.0-only
 
-diff_patch="${1}"
-untracked_patch="${2}"
-srctree=$(dirname $0)/../..
+diff_patch=$1
 
-rm -f ${diff_patch} ${untracked_patch}
+mkdir -p "$(dirname "${diff_patch}")"
 
-if ! ${srctree}/scripts/check-git; then
-	exit
-fi
-
-mkdir -p "$(dirname ${diff_patch})" "$(dirname ${untracked_patch})"
+git -C "${srctree:-.}" diff HEAD > "${diff_patch}"
 
-git -C "${srctree}" diff HEAD > "${diff_patch}"
-
-if [ ! -s "${diff_patch}" ]; then
-	rm -f "${diff_patch}"
+if [ ! -s "${diff_patch}" ] ||
+   [ -z "$(git -C "${srctree:-.}" ls-files --other --exclude-standard | head -n1)" ]; then
 	exit
 fi
 
-git -C ${srctree} status --porcelain --untracked-files=all |
-while read stat path
-do
-	if [ "${stat}" = '??' ]; then
-
-		if ! diff -u /dev/null "${srctree}/${path}" > .tmp_diff &&
-			! head -n1 .tmp_diff | grep -q "Binary files"; then
-			{
-				echo "--- /dev/null"
-				echo "+++ linux/$path"
-				cat .tmp_diff | tail -n +3
-			} >> ${untracked_patch}
-		fi
-	fi
-done
-
-rm -f .tmp_diff
-
-if [ ! -s "${diff_patch}" ]; then
-	rm -f "${diff_patch}"
-	exit
-fi
+# The source tarball, which is generated by 'git archive', contains everything
+# you committed in the repository. If you have local diff ('git diff HEAD'),
+# it will go into ${diff_patch}. If untracked files are remaining, the resulting
+# source package may not be correct.
+#
+# Examples:
+#  - You modified a source file to add #include "new-header.h"
+#    but forgot to add new-header.h
+#  - You modified a Makefile to add 'obj-$(CONFIG_FOO) += new-dirver.o'
+#    but you forgot to add new-driver.c
+#
+# You need to commit them, or at least stage them by 'git add'.
+#
+# This script does not take care of untracked files because doing so would
+# introduce additional complexity. Instead, print a warning message here if
+# untracked files are found.
+# If all untracked files are just garbage, you can ignore this warning.
+echo >&2 "============================ WARNING ============================"
+echo >&2 "Your working tree has diff from HEAD, and also untracked file(s)."
+echo >&2 "Please make sure you did 'git add' for all new files you need in"
+echo >&2 "the source package."
+echo >&2 "================================================================="