linux-kernel - [PATCH 7/9] selftests: timers: clocksource-switch: add command line switch to skip sanity check

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Date:   Wed, 13 Jul 2022 22:46:19 +0200
From:   Wolfram Sang <wsa+renesas@...g-engineering.com>
To:     linux-renesas-soc@...r.kernel.org
Cc:     John Stultz <jstultz@...gle.com>,
        Wolfram Sang <wsa+renesas@...g-engineering.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Stephen Boyd <sboyd@...nel.org>, Shuah Khan <shuah@...nel.org>,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org
Subject: [PATCH 7/9] selftests: timers: clocksource-switch: add command line switch to skip sanity check

The sanity check takes a while. If you do repeated checks when
debugging, this is time consuming. Add a parameter to skip it.

Signed-off-by: Wolfram Sang <wsa+renesas@...g-engineering.com>
---
 .../selftests/timers/clocksource-switch.c     | 40 +++++++++++++------
 1 file changed, 28 insertions(+), 12 deletions(-)

diff --git a/tools/testing/selftests/timers/clocksource-switch.c b/tools/testing/selftests/timers/clocksource-switch.c
index ed5b71f5b37c..5256e6215980 100644
--- a/tools/testing/selftests/timers/clocksource-switch.c
+++ b/tools/testing/selftests/timers/clocksource-switch.c
@@ -119,12 +119,26 @@ int run_tests(int secs)
 
 char clocksource_list[10][30];
 
-int main(int argv, char **argc)
+int main(int argc, char **argv)
 {
 	char orig_clk[512];
-	int count, i, status;
+	int count, i, status, opt;
+	int do_sanity_check = 1;
 	pid_t pid;
 
+	/* Process arguments */
+	while ((opt = getopt(argc, argv, "s")) != -1) {
+		switch (opt) {
+		case 's':
+			do_sanity_check = 0;
+			break;
+		default:
+			printf("Usage: %s [-s]\n", argv[0]);
+			printf("	-s: skip sanity checks\n");
+			exit(-1);
+		}
+	}
+
 	get_cur_clocksource(orig_clk, 512);
 
 	count = get_clocksources(clocksource_list);
@@ -135,19 +149,21 @@ int main(int argv, char **argc)
 	}
 
 	/* Check everything is sane before we start switching asynchronously */
-	for (i = 0; i < count; i++) {
-		printf("Validating clocksource %s\n", clocksource_list[i]);
-		if (change_clocksource(clocksource_list[i])) {
-			status = -1;
-			goto out;
-		}
-		if (run_tests(5)) {
-			status = -1;
-			goto out;
+	if (do_sanity_check) {
+		for (i = 0; i < count; i++) {
+			printf("Validating clocksource %s\n",
+				clocksource_list[i]);
+			if (change_clocksource(clocksource_list[i])) {
+				status = -1;
+				goto out;
+			}
+			if (run_tests(5)) {
+				status = -1;
+				goto out;
+			}
 		}
 	}
 
-
 	printf("Running Asynchronous Switching Tests...\n");
 	pid = fork();
 	if (!pid)
-- 
2.35.1