perf tests stat+csv_output: Fix shellcheck warnings

Running the shellcheck on stat+csv_output resulted in the following
warning.

Result with shellcheck  without patch:
=====
$ shellcheck -S warning stat+csv_output.sh

In stat+csv_output.sh line 23:
         [ $(uname -m) = "s390x" ] && exp='^[6-7]$'
           ^---------^ SC2046: Quote this to prevent word splitting.
In stat+csv_output.sh line 51:
[ $(id -u) != 0 ] && [ $(cat /proc/sys/kernel/perf_event_paranoid) -gt $1 ]
  ^------^ SC2046: Quote this to prevent word splitting.
                       ^-- SC2046: Quote this to prevent word splitting.
=====

Fixed the warning SC2046 by adding quotes to prevent word splitting.

Result with shellcheck with patch:
=====
$ shellcheck -S warning tests/shell/stat+csv_output.sh
$ ./perf test "stat CSV output linter"
 96: perf stat CSV output linter                                     : Ok
=====

Signed-off-by: Korrapati Likhitha <[email protected]>
Cc: Disha Goel <[email protected]>
Cc: Ian Rogers <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: John Garry <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Ravi Bangoria <[email protected]>
Cc: [email protected]
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Athira Rajeev <[email protected]>
Signed-off-by: Kajol Jain <[email protected]>
Signed-off-by: Sathvika Vasireddy <[email protected]>
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

1 files changed, 2 insertions, 2 deletions

diff --git a/tools/perf/tests/shell/stat+csv_output.sh b/tools/perf/tests/shell/stat+csv_output.sh
index a1969f236a0a..ed082daf839c 100755
--- a/tools/perf/tests/shell/stat+csv_output.sh
+++ b/tools/perf/tests/shell/stat+csv_output.sh
@@ -35,7 +35,7 @@ function commachecker()
 	;; "--interval")	exp=7
 	;; "--per-thread")	exp=7
 	;; "--system-wide-no-aggr")	exp=7
-				[ $(uname -m) = "s390x" ] && exp='^[6-7]$'
+				[ "$(uname -m)" = "s390x" ] && exp='^[6-7]$'
 	;; "--per-core")	exp=8
 	;; "--per-socket")	exp=8
 	;; "--per-node")	exp=8
@@ -66,7 +66,7 @@ function commachecker()
 # Return true if perf_event_paranoid is > $1 and not running as root.
 function ParanoidAndNotRoot()
 {
-	 [ $(id -u) != 0 ] && [ $(cat /proc/sys/kernel/perf_event_paranoid) -gt $1 ]
+	 [ "$(id -u)" != 0 ] && [ "$(cat /proc/sys/kernel/perf_event_paranoid)" -gt $1 ]
 }
 
 check_no_args()