From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- scripts/setlocalversion | 212 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 212 insertions(+) create mode 100755 scripts/setlocalversion (limited to 'scripts/setlocalversion') diff --git a/scripts/setlocalversion b/scripts/setlocalversion new file mode 100755 index 000000000..28169d7e1 --- /dev/null +++ b/scripts/setlocalversion @@ -0,0 +1,212 @@ +#!/bin/sh +# SPDX-License-Identifier: GPL-2.0 +# +# This scripts adds local version information from the version +# control system git. +# +# If something goes wrong, send a mail the kernel build mailinglist +# (see MAINTAINERS) and CC Nico Schottelius +# . +# +# + +set -e + +usage() { + echo "Usage: $0 [--no-local] [srctree]" >&2 + exit 1 +} + +no_local=false +if test "$1" = "--no-local"; then + no_local=true + shift +fi + +srctree=. +if test $# -gt 0; then + srctree=$1 + shift +fi +if test $# -gt 0 -o ! -d "$srctree"; then + usage +fi + +try_tag() { + tag="$1" + + # Is $tag an annotated tag? + if [ "$(git cat-file -t "$tag" 2> /dev/null)" != tag ]; then + return + fi + + # Is it an ancestor of HEAD, and if so, how many commits are in $tag..HEAD? + # shellcheck disable=SC2046 # word splitting is the point here + set -- $(git rev-list --count --left-right "$tag"...HEAD 2> /dev/null) + + # $1 is 0 if and only if $tag is an ancestor of HEAD. Use + # string comparison, because $1 is empty if the 'git rev-list' + # command somehow failed. + if [ "$1" != 0 ]; then + return + fi + + # $2 is the number of commits in the range $tag..HEAD, possibly 0. + count="$2" +} + +scm_version() +{ + local short=false + local no_dirty=false + local tag + + while [ $# -gt 0 ]; + do + case "$1" in + --short) + short=true;; + --no-dirty) + no_dirty=true;; + esac + shift + done + + cd "$srctree" + + if test -n "$(git rev-parse --show-cdup 2>/dev/null)"; then + return + fi + + if ! head=$(git rev-parse --verify HEAD 2>/dev/null); then + return + fi + + # mainline kernel: 6.2.0-rc5 -> v6.2-rc5 + # stable kernel: 6.1.7 -> v6.1.7 + version_tag=v$(echo "${KERNELVERSION}" | sed -E 's/^([0-9]+\.[0-9]+)\.0(.*)$/\1\2/') + + # try_tag initializes count if the tag is usable. + count= + + # If a localversion* file exists, and the corresponding + # annotated tag exists and is an ancestor of HEAD, use + # it. This is the case in linux-next. + if [ -n "${file_localversion#-}" ] ; then + try_tag "${file_localversion#-}" + fi + + # Otherwise, if a localversion* file exists, and the tag + # obtained by appending it to the tag derived from + # KERNELVERSION exists and is an ancestor of HEAD, use + # it. This is e.g. the case in linux-rt. + if [ -z "${count}" ] && [ -n "${file_localversion}" ]; then + try_tag "${version_tag}${file_localversion}" + fi + + # Otherwise, default to the annotated tag derived from KERNELVERSION. + if [ -z "${count}" ]; then + try_tag "${version_tag}" + fi + + # If we are at the tagged commit, we ignore it because the + # version is well-defined. If none of the attempted tags exist + # or were usable, $count is still empty. + if [ -z "${count}" ] || [ "${count}" -gt 0 ]; then + + # If only the short version is requested, don't bother + # running further git commands + if $short; then + echo "+" + return + fi + + # If we are past the tagged commit, we pretty print it. + # (like 6.1.0-14595-g292a089d78d3) + if [ -n "${count}" ]; then + printf "%s%05d" "-" "${count}" + fi + + # Add -g and exactly 12 hex chars. + printf '%s%.12s' -g "$head" + fi + + if ${no_dirty}; then + return + fi + + # Check for uncommitted changes. + # This script must avoid any write attempt to the source tree, which + # might be read-only. + # You cannot use 'git describe --dirty' because it tries to create + # .git/index.lock . + # First, with git-status, but --no-optional-locks is only supported in + # git >= 2.14, so fall back to git-diff-index if it fails. Note that + # git-diff-index does not refresh the index, so it may give misleading + # results. + # See git-update-index(1), git-diff-index(1), and git-status(1). + if { + git --no-optional-locks status -uno --porcelain 2>/dev/null || + git diff-index --name-only HEAD + } | read dummy; then + printf '%s' -dirty + fi +} + +collect_files() +{ + local file res= + + for file; do + case "$file" in + *\~*) + continue + ;; + esac + if test -e "$file"; then + res="$res$(cat "$file")" + fi + done + echo "$res" +} + +if [ -z "${KERNELVERSION}" ]; then + echo "KERNELVERSION is not set" >&2 + exit 1 +fi + +# localversion* files in the build and source directory +file_localversion="$(collect_files localversion*)" +if test ! "$srctree" -ef .; then + file_localversion="${file_localversion}$(collect_files "$srctree"/localversion*)" +fi + +if ${no_local}; then + echo "${KERNELVERSION}$(scm_version --no-dirty)" + exit 0 +fi + +if ! test -e include/config/auto.conf; then + echo "Error: kernelrelease not valid - run 'make prepare' to update it" >&2 + exit 1 +fi + +# version string from CONFIG_LOCALVERSION +config_localversion=$(sed -n 's/^CONFIG_LOCALVERSION=\(.*\)$/\1/p' include/config/auto.conf) + +# scm version string if not at the kernel version tag or at the file_localversion +if grep -q "^CONFIG_LOCALVERSION_AUTO=y$" include/config/auto.conf; then + # full scm version string + scm_version="$(scm_version)" +elif [ "${LOCALVERSION+set}" != "set" ]; then + # If the variable LOCALVERSION is not set, append a plus + # sign if the repository is not in a clean annotated or + # signed tagged state (as git describe only looks at signed + # or annotated tags - git tag -a/-s). + # + # If the variable LOCALVERSION is set (including being set + # to an empty string), we don't want to append a plus sign. + scm_version="$(scm_version --short)" +fi + +echo "${KERNELVERSION}${file_localversion}${config_localversion}${LOCALVERSION}${scm_version}" -- cgit v1.3.1