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-rwxr-xr-xtools/testing/selftests/rcutorture/bin/jitter.sh8
1 files changed, 6 insertions, 2 deletions
diff --git a/tools/testing/selftests/rcutorture/bin/jitter.sh b/tools/testing/selftests/rcutorture/bin/jitter.sh
index 81c6e6ab5d83..dc49a3ba6111 100755
--- a/tools/testing/selftests/rcutorture/bin/jitter.sh
+++ b/tools/testing/selftests/rcutorture/bin/jitter.sh
@@ -36,8 +36,12 @@ do
# Set affinity to randomly selected online CPU
cpus=`grep 1 /sys/devices/system/cpu/*/online |
- sed -e 's,/[^/]*$,,' -e 's/^[^0-9]*//' |
- grep -v '^0*$'`
+ sed -e 's,/[^/]*$,,' -e 's/^[^0-9]*//'`
+
+ # Do not leave out poor old cpu0 which may not be hot-pluggable
+ if [ ! -f "/sys/devices/system/cpu/cpu0/online" ]; then
+ cpus="0 $cpus"
+ fi
cpumask=`awk -v cpus="$cpus" -v me=$me -v n=$n 'BEGIN {
srand(n + me + systime());