linux-kernel - [PATCH] selftests/cgroup: Fix awk usage in test_cpuset

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Message-ID: <VI1P193MB07522BFC89B6B6DC5A89153999FCA@VI1P193MB0752.EURP193.PROD.OUTLOOK.COM>
Date:   Tue, 26 Sep 2023 03:38:19 +0800
From:   Juntong Deng <juntong.deng@...look.com>
To:     longman@...hat.com, lizefan.x@...edance.com, tj@...nel.org,
        hannes@...xchg.org, shuah@...nel.org
Cc:     cgroups@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        linux-kernel-mentees@...ts.linuxfoundation.org
Subject: [PATCH] selftests/cgroup: Fix awk usage in test_cpuset_prs.sh that may cause error

According to the awk manual, the -e option does not need to be specified
in front of 'program' (unless you need to mix program-file).

The redundant -e option can cause error when users use awk tools other
than gawk (for example, mawk does not support the -e option).

Error Example:
awk: not an option: -e
Cgroup v2 mount point not found!

Signed-off-by: Juntong Deng <juntong.deng@...look.com>
---
 tools/testing/selftests/cgroup/test_cpuset_prs.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/cgroup/test_cpuset_prs.sh b/tools/testing/selftests/cgroup/test_cpuset_prs.sh
index 4afb132e4e4f..6820653e8432 100755
--- a/tools/testing/selftests/cgroup/test_cpuset_prs.sh
+++ b/tools/testing/selftests/cgroup/test_cpuset_prs.sh
@@ -20,7 +20,7 @@ skip_test() {
 WAIT_INOTIFY=$(cd $(dirname $0); pwd)/wait_inotify
 
 # Find cgroup v2 mount point
-CGROUP2=$(mount -t cgroup2 | head -1 | awk -e '{print $3}')
+CGROUP2=$(mount -t cgroup2 | head -1 | awk '{print $3}')
 [[ -n "$CGROUP2" ]] || skip_test "Cgroup v2 mount point not found!"
 
 CPUS=$(lscpu | grep "^CPU(s):" | sed -e "s/.*:[[:space:]]*//")
-- 
2.39.2