From: Arnaldo Carvalho de Melo <acme@redhat.com>

And use it in run_workload().

Testing it:

  root@x1:~# perf trace -e *landlock* perf test -w landlock
       0.000 ( 0.015 ms): :1274331/1274331 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_PATH_BENEATH, rule_attr: 0x7ffd3fea55e0, flags: 45) = -1 EINVAL (Invalid argument)
       0.018 ( 0.003 ms): :1274331/1274331 landlock_add_rule(ruleset_fd: 11, rule_type: LANDLOCK_RULE_NET_PORT, rule_attr: 0x7ffd3fea55f0, flags: 45) = -1 EINVAL (Invalid argument)
  root@x1:~# perf test -w bla
  No workload found: bla
  root@x1:~#

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/20241011171449.1362979-2-acme@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/tests/builtin-test.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 470a9709427ddaad..2201f7ed432ce9f2 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -155,6 +155,9 @@ static struct test_workload *workloads[] = {
 	&workload__landlock,
 };
 
+#define workloads__for_each(workload) \
+	for (unsigned i = 0; i < ARRAY_SIZE(workloads) && ({ workload = workloads[i]; 1; }); i++)
+
 static int num_subtests(const struct test_suite *t)
 {
 	int num;
@@ -504,11 +507,9 @@ static int perf_test__list(int argc, const char **argv)
 
 static int run_workload(const char *work, int argc, const char **argv)
 {
-	unsigned int i = 0;
 	struct test_workload *twl;
 
-	for (i = 0; i < ARRAY_SIZE(workloads); i++) {
-		twl = workloads[i];
+	workloads__for_each(twl) {
 		if (!strcmp(twl->name, work))
 			return twl->func(argc, argv);
 	}
-- 
2.46.2