[PATCH 10/22] tools/perf/tests: Fix shellcheck issues in tests/shell/stat+shadow_stat.sh tetscase

[Athira Rajeev <atrajeev@linux.vnet.ibm.com>]

Running shellcheck on stat+shadow_stat.sh generates below
warning:

In tests/shell/stat+shadow_stat.sh line 48:
        while read cpu num evt hash ipc rest
                               ^--^ SC2034 (warning): hash appears unused. Verify use (or export if used externally).

This variable is intentioanlly unused since it is
needed to parse through the output. Use "_" as a
prefix for this throw away variable.

Signed-off-by: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
---
 tools/perf/tests/shell/stat+shadow_stat.sh | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/perf/tests/shell/stat+shadow_stat.sh b/tools/perf/tests/shell/stat+shadow_stat.sh
index 0e9cba84e757..a1918a15e36a 100755
--- a/tools/perf/tests/shell/stat+shadow_stat.sh
+++ b/tools/perf/tests/shell/stat+shadow_stat.sh
@@ -14,7 +14,7 @@ test_global_aggr()
 {
 	perf stat -a --no-big-num -e cycles,instructions sleep 1  2>&1 | \
 	grep -e cycles -e instructions | \
-	while read num evt hash ipc rest
+	while read num evt _hash ipc rest
 	do
 		# skip not counted events
 		if [ "$num" = "<not" ]; then
@@ -45,7 +45,7 @@ test_no_aggr()
 {
 	perf stat -a -A --no-big-num -e cycles,instructions sleep 1  2>&1 | \
 	grep ^CPU | \
-	while read cpu num evt hash ipc rest
+	while read cpu num evt _hash ipc rest
 	do
 		# skip not counted events
 		if [ "$num" = "<not" ]; then
-- 
2.39.1