kselftest: run tests by fixture

Now that all tests have a fixture object move from a global
list of tests to a list of tests per fixture.

Order of tests may change as we will now group and run test
fixture by fixture, rather than in declaration order.

Signed-off-by: Jakub Kicinski <[e-mail]>
Acked-by: Kees Cook <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

tools/testing/selftests/kselftest_harness.h

···
 	} \
 }
 
+struct __test_metadata;
+
 /* Contains all the information about a fixture. */
 struct __fixture_metadata {
 	const char *name;
+	struct __test_metadata *tests;
 	struct __fixture_metadata *prev, *next;
 } _fixture_global __attribute__((unused)) = {
 	.name = "global",
···
 };
 
 /* Storage for the (global) tests to be run. */
-static struct __test_metadata *__test_list;
 static unsigned int __test_count;
 
 /*
···
 static inline void __register_test(struct __test_metadata *t)
 {
 	__test_count++;
-	__LIST_APPEND(__test_list, t);
+	__LIST_APPEND(t->fixture->tests, t);
 }
 
 static inline int __bail(int for_realz, bool no_print, __u8 step)
···
 static int test_harness_run(int __attribute__((unused)) argc,
 			    char __attribute__((unused)) **argv)
 {
+	struct __fixture_metadata *f;
 	struct __test_metadata *t;
 	int ret = 0;
 	unsigned int count = 0;
···
 	/* TODO(wad) add optional arguments similar to gtest. */
 	printf("[==========] Running %u tests from %u test cases.\n",
 	       __test_count, __fixture_count + 1);
-	for (t = __test_list; t; t = t->next) {
-		count++;
-		__run_test(t->fixture, t);
-		if (t->passed)
-			pass_count++;
-		else
-			ret = 1;
+	for (f = __fixture_list; f; f = f->next) {
+		for (t = f->tests; t; t = t->next) {
+			count++;
+			__run_test(f, t);
+			if (t->passed)
+				pass_count++;
+			else
+				ret = 1;
+		}
 	}
 	printf("[==========] %u / %u tests passed.\n", pass_count, count);
 	printf("[  %s  ]\n", (ret ? "FAILED" : "PASSED"));