kernel/process_configs.sh
Justin M. Forbes f93e83b0e3
kernel-6.18.1-200
* Sat Dec 13 2025 Justin M. Forbes <jforbes@fedoraproject.org> [6.18.1-0]
- Initial setup for stable Fedora releases (Justin M. Forbes)
- Reset RHEL_RELEASE for the 6.19 cycle (Justin M. Forbes)
- add libasan-static and libubsan as BR for selftests (Thorsten Leemhuis)
- add liburing-devel as BR for selftests (Thorsten Leemhuis)
- add a few optional BRs for perf (Thorsten Leemhuis)
- Linux v6.18.1
Resolves:

Signed-off-by: Justin M. Forbes <jforbes@fedoraproject.org>
2025-12-13 11:24:43 +09:00

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#!/bin/bash
#
# This script takes the merged config files and processes them through olddefconfig
# and listnewconfig to ensure kernel configurations are valid and complete.
#
# Globally disable suggestion of appending '|| exit' or '|| return' to cd/pushd/popd commands
# shellcheck disable=SC2164
# Exit if this is a test environment
test -n "$RHTEST" && exit 0
# Display usage information and available command line options
usage()
{
# alphabetical order please
echo "process_configs.sh [ options ] package_name kernel_version"
echo " -a: report all errors, equivalent to [-c -n -w -i]"
echo " -c: error on mismatched config options"
echo " -i: ignore any errors, but print them"
echo " -m: specify make options (e.g., -m CC=clang, -m LLVM=1)"
echo " -M: commit mismatched configs to pending directory"
echo " -n: error on unset config options"
echo " -t: test run, do not overwrite original config"
echo " -w: error on misconfigured config options"
echo " -z: commit new configs to pending directory"
echo ""
echo " A special CONFIG file tag, process_configs_known_broken can be added as a"
echo " comment to any CONFIG file. This tag indicates that there is no way to "
echo " fix a CONFIG's entry. This tag should only be used in extreme cases"
echo " and is not to be used as a workaround to solve CONFIG problems."
exit 1
}
die()
{
echo "$1"
exit 1
}
# Determine the correct cross-compiler prefix based on compiler type
# For clang builds, return the architecture directly
# For GCC builds, use the dummy-tools directory
get_cross_compile()
{
arch=$1
if [[ "$CC_IS_CLANG" -eq 1 ]]; then
echo "$arch"
else
echo "scripts/dummy-tools/"
fi
}
# Find the top-level kernel source directory
# (identified by MAINTAINERS file and drivers directory)
switch_to_toplevel()
{
path="$(pwd)"
while test -n "$path"
do
test -e "$path"/MAINTAINERS && \
test -d "$path"/drivers && \
break
path=$(dirname "$path")
done
test -n "$path" || die "Can't find toplevel"
echo "$path"
}
# Determine the correct config path based on architecture and variant
# This function maps arch/variant combinations to the proper pending directory
determine_config_path()
{
local arch="$1"
local variant="$2"
local config_path=""
# Identify the variant - they have their own top-level directories
if [[ "$variant" == *"rt"* ]]; then
# RT variant - goes under rt/
if [[ "$variant" == *"debug"* ]]; then
config_path="rt/debug"
else
config_path="rt/generic"
fi
elif [[ "$variant" == *"automotive"* ]]; then
# Automotive variant - goes under automotive/
if [[ "$variant" == *"debug"* ]]; then
config_path="automotive/debug"
else
config_path="automotive/generic"
fi
else
# Stock kernel - goes under top-level debug or generic
if [[ "$variant" == *"debug"* ]]; then
config_path="debug"
else
config_path="generic"
fi
fi
# Add architecture-specific subdirectories
case "$arch" in
arm64)
config_path="$config_path/arm/aarch64"
;;
powerpc)
config_path="$config_path/powerpc"
;;
riscv)
config_path="$config_path/riscv/riscv64"
;;
s390)
if [[ "$variant" == *"zfcpdump"* ]]; then
config_path="$config_path/s390x/zfcpdump"
else
config_path="$config_path/s390x"
fi
;;
x86_64)
config_path="$config_path/x86"
;;
*)
# For unknown architectures, don't add arch subdirectory
;;
esac
echo "$config_path"
}
# Parse mismatched configs found during processing and create
# individual CONFIG files in the pending directory for each
parse_mismatched_configs()
{
local tmpdir
local count=$1 # Counter for unique filenames
local arch=$2
local variant=$3
tmpdir=$(mktemp -d)
# Parse the mismatches file and create individual CONFIG files
tail -n +2 .mismatches"${count}" | while read -r LINE
do
if echo "$LINE" | grep -q "Found # .* is not set, after generation"; then
# Handle case where we found "# CONFIG_FOO is not set" after generation
config_name="${LINE#*Found # }"
config_name="${config_name% is not set, after generation*}"
if [ -n "$config_name" ]; then
echo "# Mismatch found in $arch $variant config" > "$tmpdir/$config_name"
echo "# $config_name is not set" >> "$tmpdir/$config_name"
fi
elif echo "$LINE" | grep -q "Found .* after generation"; then
# Handle case where we found "CONFIG_FOO=value" after generation
config_name="${LINE#*Found }"
config_name="${config_name% after generation*}"
config_name="${config_name%=*}"
config_value="${LINE#*Found }"
config_value="${config_value#*=}"
config_value="${config_value% after generation*}"
if [ -n "$config_name" ] && [ -n "$config_value" ]; then
echo "# Mismatch found in $arch $variant config" > "$tmpdir/$config_name"
echo "$config_name=$config_value" >> "$tmpdir/$config_name"
fi
fi
done
# Copy the CONFIG files to the pending directory
config_path=$(determine_config_path "$arch" "$variant")
mkdir -p "$SCRIPT_DIR/pending-$FLAVOR/$config_path/"
for f in "$tmpdir"/*; do
[[ -e "$f" ]] || break
cp "$f" "$SCRIPT_DIR/pending-$FLAVOR/$config_path/"
done
rm -rf "$tmpdir"
}
# Check for configuration mismatches between the original and generated configs
checkoptions()
{
cfg=$1 # Original config file
cfgtmp=$2 # Generated config file
count=$3 # Counter for unique filenames
variant=$4 # Config variant (e.g., debug, rt)
# This awk script compares configuration files for mismatches
/usr/bin/awk '
/is not set/ {
split ($0, a, "#");
split(a[2], b);
if (NR==FNR) {
configs[b[1]]="is not set";
} else {
if (configs[b[1]] != "" && configs[b[1]] != "is not set")
print "Found # "b[1] " is not set, after generation, had " b[1] " " configs[b[1]] " in Source tree";
}
}
/=/ {
split ($0, a, "=");
if (NR==FNR) {
configs[a[1]]=a[2];
} else {
if (configs[a[1]] != "" && configs[a[1]] != a[2])
print "Found "a[1]"="a[2]" after generation, had " a[1]"="configs[a[1]]" in Source tree";
}
}
' "$cfg" "$cfgtmp" > .mismatches"${count}"
checkoptions_error=false
if test -s .mismatches"${count}"
then
while read -r LINE
do
if find "${REDHAT}"/configs -name "$(echo "$LINE" | awk -F "=" ' { print $1 } ' | awk ' { print $2 }')" -print0 | xargs -0 grep ^ | grep -q "process_configs_known_broken"; then
# This is a known broken config.
# See script help warning.
checkoptions_error=false
else
checkoptions_error=true
break
fi
done < .mismatches"${count}"
! $checkoptions_error && return
sed -i "1s/^/Error: Mismatches found in configuration files for ${arch} ${variant}\n/" .mismatches"${count}"
# Add mismatched configs to the pending directory
if test -n "$COMMITMISMATCHES"; then
parse_mismatched_configs "$count" "$arch" "$variant"
fi
else
rm -f .mismatches"${count}"
fi
}
# Parse the output of 'make listnewconfig' and 'make helpnewconfig'
# to create properly formatted configuration files for new configs
parsenewconfigs()
{
tmpdir=$(mktemp -d)
# This awk script reads the output of make listnewconfig
# and puts it into CONFIG_FOO files. Using the output of
# listnewconfig is much easier to ensure we get the default
# output.
/usr/bin/awk -v BASE="$tmpdir" '
/is not set/ {
split ($0, a, "#");
split(a[2], b);
OUT_FILE=BASE"/"b[1];
print $0 >> OUT_FILE;
}
/=/ {
split ($0, a, "=");
OUT_FILE=BASE"/"a[1];
if (a[2] == "n")
print "# " a[1] " is not set" >> OUT_FILE;
else
print $0 >> OUT_FILE;
}
' .newoptions
# This awk script parses the output of helpnewconfig.
# Each option is separated between ----- markers
# The goal is to put all the help text as a comment in
# each CONFIG_FOO file. Because of how awk works
# there's a lot of moving files around and catting to
# get what we need.
/usr/bin/awk -v BASE="$tmpdir" '
BEGIN { inpatch=0;
outfile="none";
symbol="none";
commit=""; }
/^Symbol: .*$/ {
split($0, a, " ");
symbol="CONFIG_"a[2];
outfile=BASE "/fake_"symbol
print "# ~~~" >> outfile;
}
/-----/ {
if (inpatch == 0) {
inpatch = 1;
}
else {
print "# ~~~" >> outfile;
if (symbol != "none") {
print "# Commit: "commit >> outfile
system("cat " outfile " " BASE "/" symbol " > " BASE "/tmpf");
system("mv " BASE "/tmpf " BASE "/" symbol);
symbol="none"
commit=""
}
outfile="none"
inpatch = 0;
}
}
!/-----/ {
if (inpatch == 1 && outfile != "none") {
print "# "$0 >> outfile;
}
}
/^Defined at .*$/ {
split($0, x, " ");
filenum=x[3];
split(filenum, x, ":");
file=x[1]
line=x[2]
cmd="git blame -L " line "," line " " file " | cut -d \" \" -f1 | xargs git log --pretty=format:\"%C(auto)%h %C(cyan)('%s')\" -1"
cmd | getline commit
}
' .helpnewconfig
pushd "$tmpdir" &> /dev/null
rm fake_*
popd &> /dev/null
for f in "$tmpdir"/*; do
[[ -e "$f" ]] || break
cp "$f" "$SCRIPT_DIR/pending-$FLAVOR/generic/"
done
rm -rf "$tmpdir"
}
# Commit any mismatched configs that were saved to the pending directory
commit_mismatched_configs()
{
# assume we are in $source_tree/configs, need to get to top level
pushd "$(switch_to_toplevel)" &>/dev/null
# Check if there are any modified or untracked mismatched configs to commit
if git status --porcelain "$SCRIPT_DIR/pending-$FLAVOR/" | grep -q .; then
echo "Committing mismatched configuration files..."
git add "$SCRIPT_DIR/pending-$FLAVOR"
git commit -m "[redhat] AUTOMATIC: Mismatched $FLAVOR configs"
echo "Mismatched configs committed to pending-$FLAVOR directory"
else
echo "No mismatched configs found to commit"
fi
popd &>/dev/null
}
# Processes all config files, finds new/unset configs, and commits them
function commit_new_configs()
{
# assume we are in $source_tree/configs, need to get to top level
pushd "$(switch_to_toplevel)" &>/dev/null
for cfg in "$SCRIPT_DIR/${SPECPACKAGE_NAME}${KVERREL}"*.config
do
arch=$(head -1 "$cfg" | cut -b 3-)
cfgtmp="${cfg}.tmp"
cfgorig="${cfg}.orig"
cat "$cfg" > "$cfgorig"
if [ "$arch" = "EMPTY" ]
then
# This arch is intentionally left blank
continue
fi
echo -n "Checking for new configs in $cfg ... "
# shellcheck disable=SC2086
make ${MAKEOPTS} ARCH="$arch" CROSS_COMPILE="$(get_cross_compile "$arch")" KCONFIG_CONFIG="$cfgorig" listnewconfig >& .listnewconfig
grep -E 'CONFIG_' .listnewconfig > .newoptions
if test -s .newoptions
then
# shellcheck disable=SC2086
make ${MAKEOPTS} ARCH="$arch" CROSS_COMPILE="$(get_cross_compile "$arch")" KCONFIG_CONFIG="$cfgorig" helpnewconfig >& .helpnewconfig
parsenewconfigs
fi
rm .newoptions
echo "done"
done
# Commit the new configuration files to git
git add "$SCRIPT_DIR/pending-$FLAVOR"
# DO NOT CHANGE THIS MESSAGE! gen_config_patches.sh looks for this commit message.
git commit -m "[redhat] AUTOMATIC: New configs"
}
# Process a single configuration file
function process_config()
{
local cfg
local arch
local cfgtmp
local cfgorig
local count
local variant
cfg=$1
count=$2
arch=$(head -1 "$cfg" | cut -b 3-)
if [ "$arch" = "EMPTY" ]
then
# This arch is intentionally left blank
return
fi
variant=$(basename "$cfg" | cut -d"-" -f3- | cut -d"." -f1)
cfgtmp="${cfg}.tmp"
cfgorig="${cfg}.orig"
cat "$cfg" > "$cfgorig"
echo "Processing $cfg ... "
# shellcheck disable=SC2086
make ${MAKEOPTS} ARCH="$arch" CROSS_COMPILE="$(get_cross_compile "$arch")" KCONFIG_CONFIG="$cfgorig" listnewconfig >& .listnewconfig"${count}"
grep -E 'CONFIG_' .listnewconfig"${count}" > .newoptions"${count}"
if test -n "$NEWOPTIONS" && test -s .newoptions"${count}"
then
echo "Found unset config items in ${arch} ${variant}, please set them to an appropriate value" >> .errors"${count}"
cat .newoptions"${count}" >> .errors"${count}"
rm .newoptions"${count}"
RETURNCODE=1
fi
rm -f .newoptions"${count}"
grep -E 'config.*warning' .listnewconfig"${count}" > .warnings"${count}"
if test -n "$CHECKWARNINGS" && test -s .warnings"${count}"
then
echo "Found misconfigured config items in ${arch} ${variant}, please set them to an appropriate value" >> .errors"${count}"
cat .warnings"${count}" >> .errors"${count}"
fi
rm .warnings"${count}"
rm .listnewconfig"${count}"
# shellcheck disable=SC2086
make ${MAKEOPTS} ARCH="$arch" CROSS_COMPILE="$(get_cross_compile "$arch")" KCONFIG_CONFIG="$cfgorig" olddefconfig > /dev/null || exit 1
echo "# $arch" > "$cfgtmp"
cat "$cfgorig" >> "$cfgtmp"
if test -n "$CHECKOPTIONS"
then
checkoptions "$cfg" "$cfgtmp" "$count" "$variant"
fi
# if test run, don't overwrite original
if test -n "$TESTRUN"
then
rm -f "$cfgtmp"
else
mv "$cfgtmp" "$cfg"
fi
rm -f "$cfgorig"
echo "Processing $cfg complete"
}
# Process all configuration files
# Handles parallel processing and error reporting
function process_configs()
{
# assume we are in $source_tree/configs, need to get to top level
pushd "$(switch_to_toplevel)" &>/dev/null
count=0
for cfg in "$SCRIPT_DIR/${SPECPACKAGE_NAME}${KVERREL}"*.config
do
if [ "$count" -eq 0 ]; then
# do the first one by itself so that tools are built
process_config "$cfg" "$count"
fi
process_config "$cfg" "$count" &
# shellcheck disable=SC2004
waitpids[${count}]=$!
((count++))
while [ "$(jobs | grep -c Running)" -ge "$RHJOBS" ]; do :; done
done
# shellcheck disable=SC2048
for pid in ${waitpids[*]}; do
wait "${pid}"
done
rm "$SCRIPT_DIR"/*.config*.old
if ls .errors* 1> /dev/null 2>&1; then
RETURNCODE=1
cat .errors*
rm .errors* -f
fi
# Commit any mismatched configs found during processing
if [ $RETURNCODE -eq 0 ] && test -n "$COMMITMISMATCHES"; then
rm .mismatches* -f
commit_mismatched_configs
# Otherwise, display any mismatched configs
elif ls .mismatches* 1> /dev/null 2>&1; then
RETURNCODE=1
cat .mismatches*
rm .mismatches* -f
fi
popd > /dev/null
[ $RETURNCODE -eq 0 ] && echo "Processed config files are in $SCRIPT_DIR"
}
CHECKOPTIONS=""
IGNOREERRORS=""
NEWOPTIONS=""
TESTRUN=""
CHECKWARNINGS=""
MAKEOPTS=""
CC_IS_CLANG=0
COMMITMISMATCHES=""
RETURNCODE=0
while [[ $# -gt 0 ]]
do
key="$1"
case $key in
-a)
# Enable all error checking options
CHECKOPTIONS="x"
IGNOREERRORS="x"
NEWOPTIONS="x"
CHECKWARNINGS="x"
;;
-c)
CHECKOPTIONS="x"
;;
-h)
usage
;;
-i)
IGNOREERRORS="x"
;;
-n)
NEWOPTIONS="x"
;;
-t)
TESTRUN="x"
;;
-w)
CHECKWARNINGS="x"
;;
-z)
COMMITNEWCONFIGS="x"
;;
-m)
shift
# Handle clang compiler options
if [ "$1" = "CC=clang" ] || [ "$1" = "LLVM=1" ]; then
CC_IS_CLANG=1
fi
MAKEOPTS="$MAKEOPTS $1"
;;
-M)
COMMITMISMATCHES="x"
CHECKOPTIONS="x"
;;
*)
break;;
esac
shift
done
KVERREL="$(test -n "$1" && echo "-$1" || echo "")"
FLAVOR="$(test -n "$2" && echo "$2" || echo "rhel")"
# shellcheck disable=SC2015
SCRIPT=$(readlink -f "$0")
SCRIPT_DIR=$(dirname "$SCRIPT")
# to handle this script being a symlink
cd "$SCRIPT_DIR"
if test -n "$COMMITNEWCONFIGS"; then
commit_new_configs
else
process_configs
fi
if test -n "$IGNOREERRORS"; then
exit 0
else
exit $RETURNCODE
fi