[PATCH] selftests: wireguard: avoid extglob in netns CPU count

[Yousef Alhouseen <alhouseenyousef@gmail.com>]

netns.sh enables extglob before using cpu+([0-9]) to count CPUs, but
bash -n parses the whole script without executing that shopt command. This
makes syntax checks fail even though the script is intended for bash.

Use the ordinary cpu[0-9]* glob instead. It matches the same CPU directory
names without requiring extglob, and lets bash validate the script syntax.

Signed-off-by: Yousef Alhouseen <alhouseenyousef@gmail.com>
---
 tools/testing/selftests/wireguard/netns.sh | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/tools/testing/selftests/wireguard/netns.sh b/tools/testing/selftests/wireguard/netns.sh
index a8f550aec..98b423494 100755
--- a/tools/testing/selftests/wireguard/netns.sh
+++ b/tools/testing/selftests/wireguard/netns.sh
@@ -22,12 +22,11 @@
 # interfaces in $ns1 and $ns2. See https://www.wireguard.com/netns/ for further
 # details on how this is accomplished.
 set -e
-shopt -s extglob
 
 exec 3>&1
 export LANG=C
 export WG_HIDE_KEYS=never
-NPROC=( /sys/devices/system/cpu/cpu+([0-9]) ); NPROC=${#NPROC[@]}
+NPROC=( /sys/devices/system/cpu/cpu[0-9]* ); NPROC=${#NPROC[@]}
 netns0="wg-test-$$-0"
 netns1="wg-test-$$-1"
 netns2="wg-test-$$-2"
-- 
2.54.0