[tip: timers/core] selftests: timers: nsleep-lat: Explicitly list the tested clocks

[tip-bot2 for Thomas Weißschuh (Schneider Electric)]

The following commit has been merged into the timers/core branch of tip:

Commit-ID:     187ac443ed51e04dcf0df98d270863c3f54af8fc
Gitweb:        https://git.kernel.org/tip/187ac443ed51e04dcf0df98d270863c3f54af8fc
Author:        Thomas Weißschuh (Schneider Electric) <thomas.weissschuh@xxxxxxxxxxxxx>
AuthorDate:    Mon, 03 Aug 2026 12:04:46 +02:00
Committer:     Thomas Gleixner <tglx@xxxxxxxxxx>
CommitterDate: Tue, 11 Aug 2026 18:11:21 +02:00

selftests: timers: nsleep-lat: Explicitly list the tested clocks

The test relies on the numeric values of the clockids.
As not all clocks are meant to be tested, this requires skipping some
clocks unconditionally, cluttering the result.

Use an equivalent, explicit list instead.

In addition to CLOCK_PROCESS_CPUTIME_ID, CLOCK_THREAD_CPUTIME_ID and
CLOCK_HWSPECIFIC which were unconditionally skipped before, this also
unconditionally skips CLOCK_MONOTONIC_RAW, CLOCK_MONOTONIC_COARSE and
CLOCK_REALTIME_COARSE. clock_nanosleep() is not supported for those.

Signed-off-by: Thomas Weißschuh (Schneider Electric) <thomas.weissschuh@xxxxxxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxx>
Acked-by: John Stultz <jstultz@xxxxxxxxxx>
Link: https://patch.msgid.link/20260803-auxclock-nanosleep-prep-v2-15-910cbd485390@xxxxxxxxxxxxx
---
 tools/testing/selftests/timers/nsleep-lat.c | 26 +++++++++-----------
 1 file changed, 12 insertions(+), 14 deletions(-)

diff --git a/tools/testing/selftests/timers/nsleep-lat.c b/tools/testing/selftests/timers/nsleep-lat.c
index d46f174..af47c28 100644
--- a/tools/testing/selftests/timers/nsleep-lat.c
+++ b/tools/testing/selftests/timers/nsleep-lat.c
@@ -29,9 +29,6 @@
 
 #define UNRESONABLE_LATENCY (40 * NSEC_PER_MSEC)
 
-/* CLOCK_HWSPECIFIC == CLOCK_SGI_CYCLE (Deprecated) */
-#define CLOCK_HWSPECIFIC		10
-
 #define UNSUPPORTED 0xf00f
 
 struct timespec timespec_add(struct timespec ts, unsigned long long ns)
@@ -97,24 +94,25 @@ int nanosleep_lat_test(int clockid, long long ns)
 	return 0;
 }
 
-#define SKIPPED_CLOCK_COUNT 3
-
 int main(int argc, char **argv)
 {
 	long long length;
 	int clockid, ret;
-	int max_clocks = CLOCK_TAI + 1;
 
-	ksft_print_header();
-	ksft_set_plan(max_clocks - CLOCK_REALTIME - SKIPPED_CLOCK_COUNT);
+	static const clockid_t tested_clocks[] = {
+		CLOCK_REALTIME,
+		CLOCK_MONOTONIC,
+		CLOCK_BOOTTIME,
+		CLOCK_BOOTTIME_ALARM,
+		CLOCK_REALTIME_ALARM,
+		CLOCK_TAI,
+	};
 
-	for (clockid = CLOCK_REALTIME; clockid < max_clocks; clockid++) {
+	ksft_print_header();
+	ksft_set_plan(ARRAY_SIZE(tested_clocks));
 
-		/* Skip cputime clockids since nanosleep won't increment cputime */
-		if (clockid == CLOCK_PROCESS_CPUTIME_ID ||
-				clockid == CLOCK_THREAD_CPUTIME_ID ||
-				clockid == CLOCK_HWSPECIFIC)
-			continue;
+	for (size_t clock_index = 0; clock_index < ARRAY_SIZE(tested_clocks); clock_index++) {
+		clockid = tested_clocks[clock_index];
 
 		length = 10;
 		while (length <= (NSEC_PER_SEC * 10)) {