#!/bin/sh TARGET=$1 ARCH=$2 SMP=$3 PREEMPT=$4 CC=$5 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; } # If compile.h exists already and we don't own autoconf.h # (i.e. we're not the same user who did make *config), don't # modify compile.h # So "sudo make install" won't change the "compiled by " # do "compiled by root" if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then vecho " SKIPPED $TARGET" exit 0 fi # Do not expand names set -f # Fix the language to get consistent output LC_ALL=C export LC_ALL if [ -z "$KBUILD_BUILD_VERSION" ]; then if [ -r .version ]; then VERSION=`cat .version` else VERSION=0 echo 0 > .version fi else VERSION=$KBUILD_BUILD_VERSION fi if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then TIMESTAMP=`date` else TIMESTAMP=$KBUILD_BUILD_TIMESTAMP fi if test -z "$KBUILD_BUILD_USER"; then LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/') else LINUX_COMPILE_BY=$KBUILD_BUILD_USER fi if test -z "$KBUILD_BUILD_HOST"; then LINUX_COMPILE_HOST=`hostname` else LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST fi UTS_VERSION="#$VERSION" CONFIG_FLAGS="" if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP" # Truncate to maximum length UTS_LEN=64 UTS_TRUNCATE="cut -b -$UTS_LEN" # Generate a temporary compile.h ( echo /\* This file is auto generated, version $VERSION \*/ if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi echo \#define UTS_MACHINE \"$ARCH\" echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\" echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\" echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\" echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version '`\" ) > .tmpcompile # Only replace the real compile.h if the new one is different, # in order to preserve the timestamp and avoid unnecessary # recompilations. # We don't consider the file changed if only the date/time changed. # A kernel config change will increase the generation number, thus # causing compile.h to be updated (including date/time) due to the # changed comment in the # first line. if [ -r $TARGET ] && \ grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \ grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \ cmp -s .tmpver.1 .tmpver.2; then rm -f .tmpcompile else vecho " UPD $TARGET" mv -f .tmpcompile $TARGET fi rm -f .tmpver.1 .tmpver.2 ue='nds-private-remove'/>
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authorTejun Heo <tj@kernel.org>2017-01-26 16:47:28 -0500
committerTejun Heo <tj@kernel.org>2017-01-26 16:47:28 -0500
commit07cd12945551b63ecb1a349d50a6d69d1d6feb4a (patch)
tree75f65eba7eac9277971082a2d5a4cf1370562c0c /tools/perf/builtin-annotate.c
parent7ce7d89f48834cefece7804d38fc5d85382edf77 (diff)
cgroup: don't online subsystems before cgroup_name/path() are operational
While refactoring cgroup creation, a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") incorrectly onlined subsystems before the new cgroup is associated with it kernfs_node. This is fine for cgroup proper but cgroup_name/path() depend on the associated kernfs_node and if a subsystem makes the new cgroup_subsys_state visible, which they're allowed to after onlining, it can lead to NULL dereference. The current code performs cgroup creation and subsystem onlining in cgroup_create() and cgroup_mkdir() makes the cgroup and subsystems visible afterwards. There's no reason to online the subsystems early and we can simply drop cgroup_apply_control_enable() call from cgroup_create() so that the subsystems are onlined and made visible at the same time. Signed-off-by: Tejun Heo <tj@kernel.org> Reported-by: Konstantin Khlebnikov <khlebnikov@yandex-team.ru> Fixes: a5bca2152036 ("cgroup: factor out cgroup_create() out of cgroup_mkdir()") Cc: stable@vger.kernel.org # v4.6+
Diffstat (limited to 'tools/perf/builtin-annotate.c')