The return value for each test in test_libbpf.sh is compared with

    if (( $? == 0 )) ; then ...

This works well with bash, but not with dash, that /bin/sh is aliased to
on some systems (such as Ubuntu).

Let's replace this comparison by something that works on both shells.

Signed-off-by: Quentin Monnet <quentin.mon...@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicin...@netronome.com>
---
 tools/testing/selftests/bpf/test_libbpf.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/bpf/test_libbpf.sh 
b/tools/testing/selftests/bpf/test_libbpf.sh
index d97dc914cd49..156d89f1edcc 100755
--- a/tools/testing/selftests/bpf/test_libbpf.sh
+++ b/tools/testing/selftests/bpf/test_libbpf.sh
@@ -6,7 +6,7 @@ export TESTNAME=test_libbpf
 # Determine selftest success via shell exit code
 exit_handler()
 {
-       if (( $? == 0 )); then
+       if [ $? -eq 0 ]; then
                echo "selftests: $TESTNAME [PASS]";
        else
                echo "$TESTNAME: failed at file $LAST_LOADED" 1>&2
-- 
2.7.4

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