[PATCH] selftests/zram: emit KTAP output

zram.sh, the kselftest target, prints raw banners and runs zram01.sh
and zram02.sh ignoring their exit status: both scripts always exit 0
and report the result with a plain "[PASS]"/"[FAIL]" echo, so the
harness always sees success no matter what the tests did.

Emit the TAP header and plan up front, report each sub-test from its
exit code and fold its output into "#" diagnostics, and skip both
sub-tests through the ktap helpers when not run as root.  zram01.sh
and zram02.sh now exit non-zero on failure, and check_prereqs() prints
a "1..0 # SKIP" line for standalone runs.  No test logic changes.

Tested on x86_64: both sub-tests pass as root, and are reported as
SKIP with the plan and totals lines when not run as root.

Signed-off-by: Song Hu <[email protected]>
---
 tools/testing/selftests/zram/zram.sh | 43 +++++++++++++++++++++-------
 1 file changed, 32 insertions(+), 11 deletions(-)

diff --git a/tools/testing/selftests/zram/zram.sh b/tools/testing/selftests/zram/zram.sh
index b0b91d9b0dc2..e39a84420d18 100755
--- a/tools/testing/selftests/zram/zram.sh
+++ b/tools/testing/selftests/zram/zram.sh
@@ -1,18 +1,39 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
-TCID="zram.sh"
 
-. ./zram_lib.sh
+# KTAP output helpers (ktap_test_pass, ktap_test_fail, ...).
+DIR="$(dirname "$(readlink -f "$0")")"
+# shellcheck source=../kselftest/ktap_helpers.sh
+source "${DIR}"/../kselftest/ktap_helpers.sh
 
-run_zram () {
-echo "--------------------"
-echo "running zram tests"
-echo "--------------------"
-./zram01.sh
-echo ""
-./zram02.sh
+ktap_print_header
+ktap_set_plan 2
+
+if [ "$(id -u)" -ne 0 ]; then
+	ktap_test_skip "zram01.sh: must be run as root"
+	ktap_test_skip "zram02.sh: must be run as root"
+	ktap_finished
+fi
+
+# Run a sub-test, fold its output into "# " diagnostic lines and report its
+# exit code as the KTAP result.
+run_one()
+{
+	local script=$1
+
+	"${DIR}/$script" 2>&1 | sed 's/^/# /'
+	local rc=${PIPESTATUS[0]}
+
+	if [ "$rc" -eq 0 ]; then
+		ktap_test_pass "$script"
+	elif [ "$rc" -eq "$KSFT_SKIP" ]; then
+		ktap_test_skip "$script"
+	else
+		ktap_test_fail "$script"
+	fi
 }
 
-check_prereqs
+run_one zram01.sh
+run_one zram02.sh
 
-run_zram
+ktap_finished
-- 
2.43.0