Merge tag 'linux-kselftest-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull kselftest updates form Shuah Khan:

- TAP output reporting related fixes from Paolo Bonzini and Kees Cook.

These fixes make it skip reporting consistent with TAP format.

- Cleanup fixes to framework run_tests from Yauheni Kaliuta

* tag 'linux-kselftest-5.9-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (23 commits)
selftests/harness: Limit step counter reporting
selftests/seccomp: Check ENOSYS under tracing
selftests/seccomp: Refactor to use fixture variants
selftests/harness: Clean up kern-doc for fixtures
selftests: kmod: Add module address visibility test
Replace HTTP links with HTTPS ones: KMOD KERNEL MODULE LOADER - USERMODE HELPER
selftests: fix condition in run_tests
selftests: do not use .ONESHELL
selftests: pidfd: skip test if unshare fails with EPERM
selftests: pidfd: do not use ksft_exit_skip after ksft_set_plan
selftests/harness: Report skip reason
selftests/harness: Display signed values correctly
selftests/harness: Refactor XFAIL into SKIP
selftests/harness: Switch to TAP output
selftests: Add header documentation and helpers
selftests/binderfs: Fix harness API usage
selftests: Remove unneeded selftest API headers
selftests/clone3: Reorder reporting output
selftests: sync_test: do not use ksft_exit_skip after ksft_set_plan
selftests: sigaltstack: do not use ksft_exit_skip after ksft_set_plan
...

tools/testing/selftests/breakpoints/step_after_suspend_test.c

···
 	_exit(0);
 }
 
-bool run_test(int cpu)
+int run_test(int cpu)
 {
 	int status;
 	pid_t pid = fork();
···
 
 	if (pid < 0) {
 		ksft_print_msg("fork() failed: %s\n", strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 	if (pid == 0)
 		child(cpu);
···
 	wpid = waitpid(pid, &status, __WALL);
 	if (wpid != pid) {
 		ksft_print_msg("waitpid() failed: %s\n", strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 	if (!WIFSTOPPED(status)) {
 		ksft_print_msg("child did not stop: %s\n", strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 	if (WSTOPSIG(status) != SIGSTOP) {
 		ksft_print_msg("child did not stop with SIGSTOP: %s\n",
 			strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 
 	if (ptrace(PTRACE_SINGLESTEP, pid, NULL, NULL) < 0) {
 		if (errno == EIO) {
-			ksft_exit_skip(
+			ksft_print_msg(
 				"ptrace(PTRACE_SINGLESTEP) not supported on this architecture: %s\n",
 				strerror(errno));
+			return KSFT_SKIP;
 		}
 		ksft_print_msg("ptrace(PTRACE_SINGLESTEP) failed: %s\n",
 			strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 
 	wpid = waitpid(pid, &status, __WALL);
 	if (wpid != pid) {
 		ksft_print_msg("waitpid() failed: $s\n", strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 	if (WIFEXITED(status)) {
 		ksft_print_msg("child did not single-step: %s\n",
 			strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 	if (!WIFSTOPPED(status)) {
 		ksft_print_msg("child did not stop: %s\n", strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 	if (WSTOPSIG(status) != SIGTRAP) {
 		ksft_print_msg("child did not stop with SIGTRAP: %s\n",
 			strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 
 	if (ptrace(PTRACE_CONT, pid, NULL, NULL) < 0) {
 		ksft_print_msg("ptrace(PTRACE_CONT) failed: %s\n",
 			strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 
 	wpid = waitpid(pid, &status, __WALL);
 	if (wpid != pid) {
 		ksft_print_msg("waitpid() failed: %s\n", strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 	if (!WIFEXITED(status)) {
 		ksft_print_msg("child did not exit after PTRACE_CONT: %s\n",
 			strerror(errno));
-		return false;
+		return KSFT_FAIL;
 	}
 
-	return true;
+	return KSFT_PASS;
 }
 
 void suspend(void)
···
 		}
 	}
 
-	for (cpu = 0; cpu < CPU_SETSIZE; cpu++) {
-		if (!CPU_ISSET(cpu, &available_cpus))
-			continue;
-		tests++;
-	}
-	ksft_set_plan(tests);
-
-	if (do_suspend)
-		suspend();
-
 	err = sched_getaffinity(0, sizeof(available_cpus), &available_cpus);
 	if (err < 0)
 		ksft_exit_fail_msg("sched_getaffinity() failed\n");
 
 	for (cpu = 0; cpu < CPU_SETSIZE; cpu++) {
-		bool test_success;
+		if (!CPU_ISSET(cpu, &available_cpus))
+			continue;
+		tests++;
+	}
+
+	if (do_suspend)
+		suspend();
+
+	ksft_set_plan(tests);
+	for (cpu = 0; cpu < CPU_SETSIZE; cpu++) {
+		int test_success;
 
 		if (!CPU_ISSET(cpu, &available_cpus))
 			continue;
 
 		test_success = run_test(cpu);
-		if (test_success) {
+		switch (test_success) {
+		case KSFT_PASS:
 			ksft_test_result_pass("CPU %d\n", cpu);
-		} else {
+			break;
+		case KSFT_SKIP:
+			ksft_test_result_skip("CPU %d\n", cpu);
+			break;
+		case KSFT_FAIL:
 			ksft_test_result_fail("CPU %d\n", cpu);
 			succeeded = false;
+			break;
 		}
 	}
 

tools/testing/selftests/clone3/clone3.c

···
 
 	uid_t uid = getuid();
 
-	test_clone3_supported();
 	ksft_print_header();
 	ksft_set_plan(17);
+	test_clone3_supported();
 
 	/* Just a simple clone3() should return 0.*/
 	test_clone3(0, 0, 0, CLONE3_ARGS_NO_TEST);

tools/testing/selftests/clone3/clone3_clear_sighand.c

···
 int main(int argc, char **argv)
 {
 	ksft_print_header();
-	test_clone3_supported();
-
 	ksft_set_plan(1);
+	test_clone3_supported();
 
 	test_clone3_clear_sighand();
 

tools/testing/selftests/clone3/clone3_set_tid.c

···
 	pid_t set_tid[MAX_PID_NS_LEVEL * 2];
 
 	ksft_print_header();
-	test_clone3_supported();
 	ksft_set_plan(29);
+	test_clone3_supported();
 
 	if (pipe(pipe_1) < 0 || pipe(pipe_2) < 0)
 		ksft_exit_fail_msg("pipe() failed\n");

tools/testing/selftests/filesystems/binderfs/binderfs_test.c

···
 #include <linux/android/binder.h>
 #include <linux/android/binderfs.h>
 
-#include "../../kselftest.h"
 #include "../../kselftest_harness.h"
 
 #define DEFAULT_THREADS 4
···
 		fd = -EBADF;        \
 	}
 
-#define log_exit(format, ...)                                                  \
-	({                                                                     \
-		fprintf(stderr, format "\n", ##__VA_ARGS__);                   \
-		exit(EXIT_FAILURE);                                            \
-	})
-
-static void change_mountns(void)
+static void change_mountns(struct __test_metadata *_metadata)
 {
 	int ret;
 
 	ret = unshare(CLONE_NEWNS);
-	if (ret < 0)
-		ksft_exit_fail_msg("%s - Failed to unshare mount namespace\n",
-				   strerror(errno));
+	ASSERT_EQ(ret, 0) {
+		TH_LOG("%s - Failed to unshare mount namespace",
+			strerror(errno));
+	}
 
 	ret = mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0);
-	if (ret < 0)
-		ksft_exit_fail_msg("%s - Failed to mount / as private\n",
-				   strerror(errno));
+	ASSERT_EQ(ret, 0) {
+		TH_LOG("%s - Failed to mount / as private",
+			strerror(errno));
+	}
 }
 
-static void rmdir_protect_errno(const char *dir)
+static int __do_binderfs_test(struct __test_metadata *_metadata)
 {
-	int saved_errno = errno;
-	(void)rmdir(dir);
-	errno = saved_errno;
-}
-
-static int __do_binderfs_test(void)
-{
-	int fd, ret, saved_errno;
+	int fd, ret, saved_errno, result = 1;
 	size_t len;
 	ssize_t wret;
 	struct binderfs_device device = { 0 };
···
 	char binderfs_mntpt[] = P_tmpdir "/binderfs_XXXXXX",
 		device_path[sizeof(P_tmpdir "/binderfs_XXXXXX/") + BINDERFS_MAX_NAME];
 
-	change_mountns();
+	change_mountns(_metadata);
 
-	if (!mkdtemp(binderfs_mntpt))
-		ksft_exit_fail_msg(
-			"%s - Failed to create binderfs mountpoint\n",
+	EXPECT_NE(mkdtemp(binderfs_mntpt), NULL) {
+		TH_LOG("%s - Failed to create binderfs mountpoint",
 			strerror(errno));
-
-	ret = mount(NULL, binderfs_mntpt, "binder", 0, 0);
-	if (ret < 0) {
-		if (errno != ENODEV)
-			ksft_exit_fail_msg("%s - Failed to mount binderfs\n",
-					   strerror(errno));
-
-		rmdir_protect_errno(binderfs_mntpt);
-		return 1;
+		goto out;
 	}
 
-	/* binderfs mount test passed */
-	ksft_inc_pass_cnt();
+	ret = mount(NULL, binderfs_mntpt, "binder", 0, 0);
+	EXPECT_EQ(ret, 0) {
+		if (errno == ENODEV)
+			XFAIL(goto out, "binderfs missing");
+		TH_LOG("%s - Failed to mount binderfs", strerror(errno));
+		goto rmdir;
+	}
+
+	/* success: binderfs mounted */
 
 	memcpy(device.name, "my-binder", strlen("my-binder"));
 
 	snprintf(device_path, sizeof(device_path), "%s/binder-control", binderfs_mntpt);
 	fd = open(device_path, O_RDONLY | O_CLOEXEC);
-	if (fd < 0)
-		ksft_exit_fail_msg(
-			"%s - Failed to open binder-control device\n",
+	EXPECT_GE(fd, 0) {
+		TH_LOG("%s - Failed to open binder-control device",
 			strerror(errno));
+		goto umount;
+	}
 
 	ret = ioctl(fd, BINDER_CTL_ADD, &device);
 	saved_errno = errno;
 	close(fd);
 	errno = saved_errno;
-	if (ret < 0) {
-		rmdir_protect_errno(binderfs_mntpt);
-		ksft_exit_fail_msg(
-			"%s - Failed to allocate new binder device\n",
+	EXPECT_GE(ret, 0) {
+		TH_LOG("%s - Failed to allocate new binder device",
 			strerror(errno));
+		goto umount;
 	}
 
-	ksft_print_msg(
-		"Allocated new binder device with major %d, minor %d, and name %s\n",
+	TH_LOG("Allocated new binder device with major %d, minor %d, and name %s",
 		device.major, device.minor, device.name);
 
-	/* binder device allocation test passed */
-	ksft_inc_pass_cnt();
+	/* success: binder device allocation */
 
 	snprintf(device_path, sizeof(device_path), "%s/my-binder", binderfs_mntpt);
 	fd = open(device_path, O_CLOEXEC | O_RDONLY);
-	if (fd < 0) {
-		rmdir_protect_errno(binderfs_mntpt);
-		ksft_exit_fail_msg("%s - Failed to open my-binder device\n",
-				   strerror(errno));
+	EXPECT_GE(fd, 0) {
+		TH_LOG("%s - Failed to open my-binder device",
+			strerror(errno));
+		goto umount;
 	}
 
 	ret = ioctl(fd, BINDER_VERSION, &version);
 	saved_errno = errno;
 	close(fd);
 	errno = saved_errno;
-	if (ret < 0) {
-		rmdir_protect_errno(binderfs_mntpt);
-		ksft_exit_fail_msg(
-			"%s - Failed to open perform BINDER_VERSION request\n",
+	EXPECT_GE(ret, 0) {
+		TH_LOG("%s - Failed to open perform BINDER_VERSION request",
 			strerror(errno));
+		goto umount;
 	}
 
-	ksft_print_msg("Detected binder version: %d\n",
-		       version.protocol_version);
+	TH_LOG("Detected binder version: %d", version.protocol_version);
 
-	/* binder transaction with binderfs binder device passed */
-	ksft_inc_pass_cnt();
+	/* success: binder transaction with binderfs binder device */
 
 	ret = unlink(device_path);
-	if (ret < 0) {
-		rmdir_protect_errno(binderfs_mntpt);
-		ksft_exit_fail_msg("%s - Failed to delete binder device\n",
-				   strerror(errno));
+	EXPECT_EQ(ret, 0) {
+		TH_LOG("%s - Failed to delete binder device",
+			strerror(errno));
+		goto umount;
 	}
 
-	/* binder device removal passed */
-	ksft_inc_pass_cnt();
+	/* success: binder device removal */
 
 	snprintf(device_path, sizeof(device_path), "%s/binder-control", binderfs_mntpt);
 	ret = unlink(device_path);
-	if (!ret) {
-		rmdir_protect_errno(binderfs_mntpt);
-		ksft_exit_fail_msg("Managed to delete binder-control device\n");
-	} else if (errno != EPERM) {
-		rmdir_protect_errno(binderfs_mntpt);
-		ksft_exit_fail_msg(
-			"%s - Failed to delete binder-control device but exited with unexpected error code\n",
+	EXPECT_NE(ret, 0) {
+		TH_LOG("Managed to delete binder-control device");
+		goto umount;
+	}
+	EXPECT_EQ(errno, EPERM) {
+		TH_LOG("%s - Failed to delete binder-control device but exited with unexpected error code",
 			strerror(errno));
+		goto umount;
 	}
 
-	/* binder-control device removal failed as expected */
-	ksft_inc_xfail_cnt();
+	/* success: binder-control device removal failed as expected */
+	result = 0;
 
-on_error:
+umount:
 	ret = umount2(binderfs_mntpt, MNT_DETACH);
-	rmdir_protect_errno(binderfs_mntpt);
-	if (ret < 0)
-		ksft_exit_fail_msg("%s - Failed to unmount binderfs\n",
-				   strerror(errno));
-
-	/* binderfs unmount test passed */
-	ksft_inc_pass_cnt();
-	return 0;
+	EXPECT_EQ(ret, 0) {
+		TH_LOG("%s - Failed to unmount binderfs", strerror(errno));
+	}
+rmdir:
+	ret = rmdir(binderfs_mntpt);
+	EXPECT_EQ(ret, 0) {
+		TH_LOG("%s - Failed to rmdir binderfs mount", strerror(errno));
+	}
+out:
+	return result;
 }
 
 static int wait_for_pid(pid_t pid)
···
 	return 0;
 }
 
-static void change_userns(int syncfds[2])
+static void change_userns(struct __test_metadata *_metadata, int syncfds[2])
 {
 	int ret;
 	char buf;
···
 	close_prot_errno_disarm(syncfds[1]);
 
 	ret = unshare(CLONE_NEWUSER);
-	if (ret < 0)
-		ksft_exit_fail_msg("%s - Failed to unshare user namespace\n",
-				   strerror(errno));
+	ASSERT_EQ(ret, 0) {
+		TH_LOG("%s - Failed to unshare user namespace",
+			strerror(errno));
+	}
 
 	ret = write_nointr(syncfds[0], "1", 1);
-	if (ret != 1)
-		ksft_exit_fail_msg("write_nointr() failed\n");
+	ASSERT_EQ(ret, 1) {
+		TH_LOG("write_nointr() failed");
+	}
 
 	ret = read_nointr(syncfds[0], &buf, 1);
-	if (ret != 1)
-		ksft_exit_fail_msg("read_nointr() failed\n");
+	ASSERT_EQ(ret, 1) {
+		TH_LOG("read_nointr() failed");
+	}
 
 	close_prot_errno_disarm(syncfds[0]);
 
-	if (setid_userns_root())
-		ksft_exit_fail_msg("setid_userns_root() failed");
+	ASSERT_EQ(setid_userns_root(), 0) {
+		TH_LOG("setid_userns_root() failed");
+	}
 }
 
-static void change_idmaps(int syncfds[2], pid_t pid)
+static void change_idmaps(struct __test_metadata *_metadata, int syncfds[2], pid_t pid)
 {
 	int ret;
 	char buf;
···
 	close_prot_errno_disarm(syncfds[0]);
 
 	ret = read_nointr(syncfds[1], &buf, 1);
-	if (ret != 1)
-		ksft_exit_fail_msg("read_nointr() failed\n");
+	ASSERT_EQ(ret, 1) {
+		TH_LOG("read_nointr() failed");
+	}
 
 	snprintf(id_map, sizeof(id_map), "0 %d 1\n", getuid());
 	ret = write_id_mapping(UID_MAP, pid, id_map, strlen(id_map));
-	if (ret)
-		ksft_exit_fail_msg("write_id_mapping(UID_MAP) failed");
+	ASSERT_EQ(ret, 0) {
+		TH_LOG("write_id_mapping(UID_MAP) failed");
+	}
 
 	snprintf(id_map, sizeof(id_map), "0 %d 1\n", getgid());
 	ret = write_id_mapping(GID_MAP, pid, id_map, strlen(id_map));
-	if (ret)
-		ksft_exit_fail_msg("write_id_mapping(GID_MAP) failed");
+	ASSERT_EQ(ret, 0) {
+		TH_LOG("write_id_mapping(GID_MAP) failed");
+	}
 
 	ret = write_nointr(syncfds[1], "1", 1);
-	if (ret != 1)
-		ksft_exit_fail_msg("write_nointr() failed");
+	ASSERT_EQ(ret, 1) {
+		TH_LOG("write_nointr() failed");
+	}
 
 	close_prot_errno_disarm(syncfds[1]);
 }
 
+struct __test_metadata *_thread_metadata;
 static void *binder_version_thread(void *data)
 {
+	struct __test_metadata *_metadata = _thread_metadata;
 	int fd = PTR_TO_INT(data);
 	struct binder_version version = { 0 };
 	int ret;
 
 	ret = ioctl(fd, BINDER_VERSION, &version);
 	if (ret < 0)
-		ksft_print_msg("%s - Failed to open perform BINDER_VERSION request\n", strerror(errno));
+		TH_LOG("%s - Failed to open perform BINDER_VERSION request\n",
+			strerror(errno));
 
 	pthread_exit(data);
 }
···
 		device_path[sizeof(P_tmpdir "/binderfs_XXXXXX/") + BINDERFS_MAX_NAME];
 
 	ret = socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, syncfds);
-	if (ret < 0)
-		ksft_exit_fail_msg("%s - Failed to create socket pair", strerror(errno));
+	ASSERT_EQ(ret, 0) {
+		TH_LOG("%s - Failed to create socket pair", strerror(errno));
+	}
 
 	pid = fork();
-	if (pid < 0) {
+	ASSERT_GE(pid, 0) {
+		TH_LOG("%s - Failed to fork", strerror(errno));
 		close_prot_errno_disarm(syncfds[0]);
 		close_prot_errno_disarm(syncfds[1]);
-		ksft_exit_fail_msg("%s - Failed to fork", strerror(errno));
 	}
 
 	if (pid == 0) {
 		int i, j, k, nthreads;
 		pthread_attr_t attr;
 		pthread_t threads[DEFAULT_THREADS];
-		change_userns(syncfds);
-		change_mountns();
+		change_userns(_metadata, syncfds);
+		change_mountns(_metadata);
 
-		if (!mkdtemp(binderfs_mntpt))
-			log_exit("%s - Failed to create binderfs mountpoint\n",
-				 strerror(errno));
+		ASSERT_NE(mkdtemp(binderfs_mntpt), NULL) {
+			TH_LOG("%s - Failed to create binderfs mountpoint",
+				strerror(errno));
+		}
 
 		ret = mount(NULL, binderfs_mntpt, "binder", 0, 0);
-		if (ret < 0)
-			log_exit("%s - Failed to mount binderfs\n", strerror(errno));
+		ASSERT_EQ(ret, 0) {
+			TH_LOG("%s - Failed to mount binderfs", strerror(errno));
+		}
 
 		for (int i = 0; i < ARRAY_SIZE(fds); i++) {
 
 			snprintf(device_path, sizeof(device_path),
 				 "%s/binder-control", binderfs_mntpt);
 			fd = open(device_path, O_RDONLY | O_CLOEXEC);
-			if (fd < 0)
-				log_exit("%s - Failed to open binder-control device\n", strerror(errno));
+			ASSERT_GE(fd, 0) {
+				TH_LOG("%s - Failed to open binder-control device",
+					strerror(errno));
+			}
 
 			memset(&device, 0, sizeof(device));
 			snprintf(device.name, sizeof(device.name), "%d", i);
 			ret = ioctl(fd, BINDER_CTL_ADD, &device);
 			close_prot_errno_disarm(fd);
-			if (ret < 0)
-				log_exit("%s - Failed to allocate new binder device\n", strerror(errno));
+			ASSERT_EQ(ret, 0) {
+				TH_LOG("%s - Failed to allocate new binder device",
+					strerror(errno));
+			}
 
 			snprintf(device_path, sizeof(device_path), "%s/%d",
 				 binderfs_mntpt, i);
 			fds[i] = open(device_path, O_RDONLY | O_CLOEXEC);
-			if (fds[i] < 0)
-				log_exit("%s - Failed to open binder device\n", strerror(errno));
+			ASSERT_GE(fds[i], 0) {
+				TH_LOG("%s - Failed to open binder device", strerror(errno));
+			}
 		}
 
 		ret = umount2(binderfs_mntpt, MNT_DETACH);
-		rmdir_protect_errno(binderfs_mntpt);
-		if (ret < 0)
-			log_exit("%s - Failed to unmount binderfs\n", strerror(errno));
+		ASSERT_EQ(ret, 0) {
+			TH_LOG("%s - Failed to unmount binderfs", strerror(errno));
+			rmdir(binderfs_mntpt);
+		}
 
 		nthreads = get_nprocs_conf();
 		if (nthreads > DEFAULT_THREADS)
 			nthreads = DEFAULT_THREADS;
 
+		_thread_metadata = _metadata;
 		pthread_attr_init(&attr);
 		for (k = 0; k < ARRAY_SIZE(fds); k++) {
 			for (i = 0; i < nthreads; i++) {
 				ret = pthread_create(&threads[i], &attr, binder_version_thread, INT_TO_PTR(fds[k]));
 				if (ret) {
-					ksft_print_msg("%s - Failed to create thread %d\n", strerror(errno), i);
+					TH_LOG("%s - Failed to create thread %d",
+						strerror(errno), i);
 					break;
 				}
 			}
···
 
 				ret = pthread_join(threads[j], &fdptr);
 				if (ret)
-					ksft_print_msg("%s - Failed to join thread %d for fd %d\n", strerror(errno), j, PTR_TO_INT(fdptr));
+					TH_LOG("%s - Failed to join thread %d for fd %d",
+						strerror(errno), j, PTR_TO_INT(fdptr));
 			}
 		}
 		pthread_attr_destroy(&attr);
···
 		exit(EXIT_SUCCESS);
 	}
 
-	change_idmaps(syncfds, pid);
+	change_idmaps(_metadata, syncfds, pid);
 
 	ret = wait_for_pid(pid);
-	if (ret)
-		ksft_exit_fail_msg("wait_for_pid() failed");
+	ASSERT_EQ(ret, 0) {
+		TH_LOG("wait_for_pid() failed");
+	}
 }
 
 TEST(binderfs_test_privileged)
···
 	if (geteuid() != 0)
 		XFAIL(return, "Tests are not run as root. Skipping privileged tests");
 
-	if (__do_binderfs_test() == 1)
+	if (__do_binderfs_test(_metadata))
 		XFAIL(return, "The Android binderfs filesystem is not available");
 }
 
···
 	pid_t pid;
 
 	ret = socketpair(PF_LOCAL, SOCK_STREAM | SOCK_CLOEXEC, 0, syncfds);
-	if (ret < 0)
-		ksft_exit_fail_msg("%s - Failed to create socket pair", strerror(errno));
+	ASSERT_EQ(ret, 0) {
+		TH_LOG("%s - Failed to create socket pair", strerror(errno));
+	}
 
 	pid = fork();
-	if (pid < 0) {
+	ASSERT_GE(pid, 0) {
 		close_prot_errno_disarm(syncfds[0]);
 		close_prot_errno_disarm(syncfds[1]);
-		ksft_exit_fail_msg("%s - Failed to fork", strerror(errno));
+		TH_LOG("%s - Failed to fork", strerror(errno));
 	}
 
 	if (pid == 0) {
-		change_userns(syncfds);
-		if (__do_binderfs_test() == 1)
+		change_userns(_metadata, syncfds);
+		if (__do_binderfs_test(_metadata))
 			exit(2);
 		exit(EXIT_SUCCESS);
 	}
 
-	change_idmaps(syncfds, pid);
+	change_idmaps(_metadata, syncfds, pid);
 
 	ret = wait_for_pid(pid);
 	if (ret) {
 		if (ret == 2)
 			XFAIL(return, "The Android binderfs filesystem is not available");
-		else
-			ksft_exit_fail_msg("wait_for_pid() failed");
+		ASSERT_EQ(ret, 0) {
+			TH_LOG("wait_for_pid() failed");
+		}
 	}
 }
 

tools/testing/selftests/kmod/kmod.sh

···
 	if [[ $KMOD_VERSION  -le 19 ]]; then
 		echo "$0: You need at least kmod 20" >&2
 		echo "kmod <= 19 is buggy, for details see:" >&2
-		echo "http://git.kernel.org/cgit/utils/kernel/kmod/kmod.git/commit/libkmod/libkmod-module.c?id=fd44a98ae2eb5eb32161088954ab21e58e19dfc4" >&2
+		echo "https://git.kernel.org/cgit/utils/kernel/kmod/kmod.git/commit/libkmod/libkmod-module.c?id=fd44a98ae2eb5eb32161088954ab21e58e19dfc4" >&2
 		exit $ksft_skip
 	fi
 

tools/testing/selftests/kselftest.h

···
 /* SPDX-License-Identifier: GPL-2.0 */
 /*
- * kselftest.h:	kselftest framework return codes to include from
- *		selftests.
+ * kselftest.h:	low-level kselftest framework to include from
+ *		selftest programs. When possible, please use
+ *		kselftest_harness.h instead.
  *
  * Copyright (c) 2014 Shuah Khan <[e-mail]>
  * Copyright (c) 2014 Samsung Electronics Co., Ltd.
+ *
+ * Using this API consists of first counting how many tests your code
+ * has to run, and then starting up the reporting:
+ *
+ *     ksft_print_header();
+ *     ksft_set_plan(total_number_of_tests);
+ *
+ * For each test, report any progress, debugging, etc with:
+ *
+ *     ksft_print_msg(fmt, ...);
+ *
+ * and finally report the pass/fail/skip/xfail state of the test with one of:
+ *
+ *     ksft_test_result(condition, fmt, ...);
+ *     ksft_test_result_pass(fmt, ...);
+ *     ksft_test_result_fail(fmt, ...);
+ *     ksft_test_result_skip(fmt, ...);
+ *     ksft_test_result_xfail(fmt, ...);
+ *     ksft_test_result_error(fmt, ...);
+ *
+ * When all tests are finished, clean up and exit the program with one of:
+ *
+ *    ksft_exit(condition);
+ *    ksft_exit_pass();
+ *    ksft_exit_fail();
+ *
+ * If the program wants to report details on why the entire program has
+ * failed, it can instead exit with a message (this is usually done when
+ * the program is aborting before finishing all tests):
+ *
+ *    ksft_exit_fail_msg(fmt, ...);
  *
  */
 #ifndef __KSELFTEST_H
···
 	if (ksft_plan != ksft_test_num())
 		printf("# Planned tests != run tests (%u != %u)\n",
 			ksft_plan, ksft_test_num());
-	printf("# Pass %d Fail %d Xfail %d Xpass %d Skip %d Error %d\n",
+	printf("# Totals: pass:%d fail:%d xfail:%d xpass:%d skip:%d error:%d\n",
 		ksft_cnt.ksft_pass, ksft_cnt.ksft_fail,
 		ksft_cnt.ksft_xfail, ksft_cnt.ksft_xpass,
 		ksft_cnt.ksft_xskip, ksft_cnt.ksft_error);
···
 	va_end(args);
 }
 
+/**
+ * ksft_test_result() - Report test success based on truth of condition
+ *
+ * @condition: if true, report test success, otherwise failure.
+ */
+#define ksft_test_result(condition, fmt, ...) do {	\
+	if (!!(condition))				\
+		ksft_test_result_pass(fmt, ##__VA_ARGS__);\
+	else						\
+		ksft_test_result_fail(fmt, ##__VA_ARGS__);\
+	} while (0)
+
+static inline void ksft_test_result_xfail(const char *msg, ...)
+{
+	int saved_errno = errno;
+	va_list args;
+
+	ksft_cnt.ksft_xfail++;
+
+	va_start(args, msg);
+	printf("ok %d # XFAIL ", ksft_test_num());
+	errno = saved_errno;
+	vprintf(msg, args);
+	va_end(args);
+}
+
 static inline void ksft_test_result_skip(const char *msg, ...)
 {
 	int saved_errno = errno;
···
 	ksft_cnt.ksft_xskip++;
 
 	va_start(args, msg);
-	printf("not ok %d # SKIP ", ksft_test_num());
+	printf("ok %d # SKIP ", ksft_test_num());
 	errno = saved_errno;
 	vprintf(msg, args);
 	va_end(args);
 }
 
+/* TODO: how does "error" differ from "fail" or "skip"? */
 static inline void ksft_test_result_error(const char *msg, ...)
 {
 	int saved_errno = errno;
···
 
 static inline int ksft_exit_fail(void)
 {
-	printf("Bail out!\n");
 	ksft_print_cnts();
 	exit(KSFT_FAIL);
 }
+
+/**
+ * ksft_exit() - Exit selftest based on truth of condition
+ *
+ * @condition: if true, exit self test with success, otherwise fail.
+ */
+#define ksft_exit(condition) do {	\
+	if (!!(condition))		\
+		ksft_exit_pass();	\
+	else				\
+		ksft_exit_fail();	\
+	} while (0)
 
 static inline int ksft_exit_fail_msg(const char *msg, ...)
 {
···
 
 static inline int ksft_exit_skip(const char *msg, ...)
 {
-	if (msg) {
-		int saved_errno = errno;
-		va_list args;
+	int saved_errno = errno;
+	va_list args;
 
-		va_start(args, msg);
-		printf("not ok %d # SKIP ", 1 + ksft_test_num());
+	va_start(args, msg);
+
+	/*
+	 * FIXME: several tests misuse ksft_exit_skip so produce
+	 * something sensible if some tests have already been run
+	 * or a plan has been printed.  Those tests should use
+	 * ksft_test_result_skip or ksft_exit_fail_msg instead.
+	 */
+	if (ksft_plan || ksft_test_num()) {
+		ksft_cnt.ksft_xskip++;
+		printf("ok %d # SKIP ", 1 + ksft_test_num());
+	} else {
+		printf("1..0 # SKIP ");
+	}
+	if (msg) {
 		errno = saved_errno;
 		vprintf(msg, args);
 		va_end(args);
-	} else {
-		ksft_print_cnts();
 	}
+	if (ksft_test_num())
+		ksft_print_cnts();
 	exit(KSFT_SKIP);
 }
 

tools/testing/selftests/kselftest/runner.sh

···
 		echo "ok $test_num $TEST_HDR_MSG") ||
 		(rc=$?;	\
 		if [ $rc -eq $skip_rc ]; then	\
-			echo "not ok $test_num $TEST_HDR_MSG # SKIP"
+			echo "ok $test_num $TEST_HDR_MSG # SKIP"
 		elif [ $rc -eq $timeout_rc ]; then \
 			echo "#"
 			echo "not ok $test_num $TEST_HDR_MSG # TIMEOUT"

tools/testing/selftests/kselftest_harness.h

···
 #ifndef __KSELFTEST_HARNESS_H
 #define __KSELFTEST_HARNESS_H
 
+#ifndef _GNU_SOURCE
 #define _GNU_SOURCE
+#endif
 #include <asm/types.h>
 #include <errno.h>
 #include <stdbool.h>
···
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <sys/mman.h>
 #include <sys/types.h>
 #include <sys/wait.h>
 #include <unistd.h>
+
+#include "kselftest.h"
 
 #define TEST_TIMEOUT_DEFAULT 30
 
···
 
 /* Unconditional logger for internal use. */
 #define __TH_LOG(fmt, ...) \
-		fprintf(TH_LOG_STREAM, "%s:%d:%s:" fmt "\n", \
+		fprintf(TH_LOG_STREAM, "# %s:%d:%s:" fmt "\n", \
 			__FILE__, __LINE__, _metadata->name, ##__VA_ARGS__)
 
 /**
- * XFAIL(statement, fmt, ...)
+ * SKIP(statement, fmt, ...)
  *
- * @statement: statement to run after reporting XFAIL
+ * @statement: statement to run after reporting SKIP
  * @fmt: format string
  * @...: optional arguments
  *
- * This forces a "pass" after reporting a failure with an XFAIL prefix,
+ * This forces a "pass" after reporting why something is being skipped
  * and runs "statement", which is usually "return" or "goto skip".
  */
-#define XFAIL(statement, fmt, ...) do { \
+#define SKIP(statement, fmt, ...) do { \
+	snprintf(_metadata->results->reason, \
+		 sizeof(_metadata->results->reason), fmt, ##__VA_ARGS__); \
 	if (TH_LOG_ENABLED) { \
-		fprintf(TH_LOG_STREAM, "[  XFAIL!  ] " fmt "\n", \
-			##__VA_ARGS__); \
+		fprintf(TH_LOG_STREAM, "#      SKIP     %s\n", \
+			_metadata->results->reason); \
 	} \
-	/* TODO: find a way to pass xfail to test runner process. */ \
 	_metadata->passed = 1; \
+	_metadata->skip = 1; \
 	_metadata->trigger = 0; \
 	statement; \
 } while (0)
···
 			__bail(_assert, _metadata->no_print, _metadata->step))
 
 #define __INC_STEP(_metadata) \
-	if (_metadata->passed && _metadata->step < 255) \
+	/* Keep "step" below 255 (which is used for "SKIP" reporting). */	\
+	if (_metadata->passed && _metadata->step < 253) \
 		_metadata->step++;
+
+#define is_signed_type(var)       (!!(((__typeof__(var))(-1)) < (__typeof__(var))1))
 
 #define __EXPECT(_expected, _expected_str, _seen, _seen_str, _t, _assert) do { \
 	/* Avoid multiple evaluation of the cases */ \
···
 	__typeof__(_seen) __seen = (_seen); \
 	if (_assert) __INC_STEP(_metadata); \
 	if (!(__exp _t __seen)) { \
-		unsigned long long __exp_print = (uintptr_t)__exp; \
-		unsigned long long __seen_print = (uintptr_t)__seen; \
-		__TH_LOG("Expected %s (%llu) %s %s (%llu)", \
-			 _expected_str, __exp_print, #_t, \
-			 _seen_str, __seen_print); \
+		/* Report with actual signedness to avoid weird output. */ \
+		switch (is_signed_type(__exp) * 2 + is_signed_type(__seen)) { \
+		case 0: { \
+			unsigned long long __exp_print = (uintptr_t)__exp; \
+			unsigned long long __seen_print = (uintptr_t)__seen; \
+			__TH_LOG("Expected %s (%llu) %s %s (%llu)", \
+				 _expected_str, __exp_print, #_t, \
+				 _seen_str, __seen_print); \
+			break; \
+			} \
+		case 1: { \
+			unsigned long long __exp_print = (uintptr_t)__exp; \
+			long long __seen_print = (intptr_t)__seen; \
+			__TH_LOG("Expected %s (%llu) %s %s (%lld)", \
+				 _expected_str, __exp_print, #_t, \
+				 _seen_str, __seen_print); \
+			break; \
+			} \
+		case 2: { \
+			long long __exp_print = (intptr_t)__exp; \
+			unsigned long long __seen_print = (uintptr_t)__seen; \
+			__TH_LOG("Expected %s (%lld) %s %s (%llu)", \
+				 _expected_str, __exp_print, #_t, \
+				 _seen_str, __seen_print); \
+			break; \
+			} \
+		case 3: { \
+			long long __exp_print = (intptr_t)__exp; \
+			long long __seen_print = (intptr_t)__seen; \
+			__TH_LOG("Expected %s (%lld) %s %s (%lld)", \
+				 _expected_str, __exp_print, #_t, \
+				 _seen_str, __seen_print); \
+			break; \
+			} \
+		} \
 		_metadata->passed = 0; \
 		/* Ensure the optional handler is triggered */ \
 		_metadata->trigger = 1; \
···
 		head = item; \
 	} \
 }
+
+struct __test_results {
+	char reason[1024];	/* Reason for test result */
+};
 
 struct __test_metadata;
 struct __fixture_variant_metadata;
···
 	struct __fixture_metadata *fixture;
 	int termsig;
 	int passed;
+	int skip;	/* did SKIP get used? */
 	int trigger; /* extra handler after the evaluation */
 	int timeout;	/* seconds to wait for test timeout */
 	bool timed_out;	/* did this test timeout instead of exiting? */
 	__u8 step;
 	bool no_print; /* manual trigger when TH_LOG_STREAM is not available */
+	struct __test_results *results;
 	struct __test_metadata *prev, *next;
 };
 
···
 	/* Sanity check handler execution environment. */
 	if (!t) {
 		fprintf(TH_LOG_STREAM,
-			"no active test in SIGALRM handler!?\n");
+			"# no active test in SIGALRM handler!?\n");
 		abort();
 	}
 	if (sig != SIGALRM || sig != info->si_signo) {
 		fprintf(TH_LOG_STREAM,
-			"%s: SIGALRM handler caught signal %d!?\n",
+			"# %s: SIGALRM handler caught signal %d!?\n",
 			t->name, sig != SIGALRM ? sig : info->si_signo);
 		abort();
 	}
···
 	if (sigaction(SIGALRM, &action, &saved_action)) {
 		t->passed = 0;
 		fprintf(TH_LOG_STREAM,
-			"%s: unable to install SIGALRM handler\n",
+			"# %s: unable to install SIGALRM handler\n",
 			t->name);
 		return;
 	}
···
 	if (sigaction(SIGALRM, &saved_action, NULL)) {
 		t->passed = 0;
 		fprintf(TH_LOG_STREAM,
-			"%s: unable to uninstall SIGALRM handler\n",
+			"# %s: unable to uninstall SIGALRM handler\n",
 			t->name);
 		return;
 	}
···
 	if (t->timed_out) {
 		t->passed = 0;
 		fprintf(TH_LOG_STREAM,
-			"%s: Test terminated by timeout\n", t->name);
+			"# %s: Test terminated by timeout\n", t->name);
 	} else if (WIFEXITED(status)) {
-		t->passed = t->termsig == -1 ? !WEXITSTATUS(status) : 0;
 		if (t->termsig != -1) {
+			t->passed = 0;
 			fprintf(TH_LOG_STREAM,
-				"%s: Test exited normally "
-				"instead of by signal (code: %d)\n",
+				"# %s: Test exited normally instead of by signal (code: %d)\n",
 				t->name,
 				WEXITSTATUS(status));
-		} else if (!t->passed) {
-			fprintf(TH_LOG_STREAM,
-				"%s: Test failed at step #%d\n",
-				t->name,
-				WEXITSTATUS(status));
+		} else {
+			switch (WEXITSTATUS(status)) {
+			/* Success */
+			case 0:
+				t->passed = 1;
+				break;
+			/* SKIP */
+			case 255:
+				t->passed = 1;
+				t->skip = 1;
+				break;
+			/* Other failure, assume step report. */
+			default:
+				t->passed = 0;
+				fprintf(TH_LOG_STREAM,
+					"# %s: Test failed at step #%d\n",
+					t->name,
+					WEXITSTATUS(status));
+			}
 		}
 	} else if (WIFSIGNALED(status)) {
 		t->passed = 0;
 		if (WTERMSIG(status) == SIGABRT) {
 			fprintf(TH_LOG_STREAM,
-				"%s: Test terminated by assertion\n",
+				"# %s: Test terminated by assertion\n",
 				t->name);
 		} else if (WTERMSIG(status) == t->termsig) {
 			t->passed = 1;
 		} else {
 			fprintf(TH_LOG_STREAM,
-				"%s: Test terminated unexpectedly "
-				"by signal %d\n",
+				"# %s: Test terminated unexpectedly by signal %d\n",
 				t->name,
 				WTERMSIG(status));
 		}
 	} else {
 		fprintf(TH_LOG_STREAM,
-			"%s: Test ended in some other way [%u]\n",
+			"# %s: Test ended in some other way [%u]\n",
 			t->name,
 			status);
 	}
···
 {
 	/* reset test struct */
 	t->passed = 1;
+	t->skip = 0;
 	t->trigger = 0;
 	t->step = 0;
 	t->no_print = 0;
+	memset(t->results->reason, 0, sizeof(t->results->reason));
 
-	printf("[ RUN      ] %s%s%s.%s\n",
+	ksft_print_msg(" RUN           %s%s%s.%s ...\n",
 	       f->name, variant->name[0] ? "." : "", variant->name, t->name);
 	t->pid = fork();
 	if (t->pid < 0) {
-		printf("ERROR SPAWNING TEST CHILD\n");
+		ksft_print_msg("ERROR SPAWNING TEST CHILD\n");
 		t->passed = 0;
 	} else if (t->pid == 0) {
 		t->fn(t, variant);
-		/* return the step that failed or 0 */
-		_exit(t->passed ? 0 : t->step);
+		if (t->skip)
+			_exit(255);
+		/* Pass is exit 0 */
+		if (t->passed)
+			_exit(0);
+		/* Something else happened, report the step. */
+		_exit(t->step);
 	} else {
 		__wait_for_test(t);
 	}
-	printf("[     %4s ] %s%s%s.%s\n", (t->passed ? "OK" : "FAIL"),
+	ksft_print_msg("         %4s  %s%s%s.%s\n", t->passed ? "OK" : "FAIL",
 	       f->name, variant->name[0] ? "." : "", variant->name, t->name);
+
+	if (t->skip)
+		ksft_test_result_skip("%s\n", t->results->reason[0] ?
+					t->results->reason : "unknown");
+	else
+		ksft_test_result(t->passed, "%s%s%s.%s\n",
+			f->name, variant->name[0] ? "." : "", variant->name, t->name);
 }
 
 static int test_harness_run(int __attribute__((unused)) argc,
···
 	struct __fixture_variant_metadata no_variant = { .name = "", };
 	struct __fixture_variant_metadata *v;
 	struct __fixture_metadata *f;
+	struct __test_results *results;
 	struct __test_metadata *t;
 	int ret = 0;
 	unsigned int case_count = 0, test_count = 0;
···
 		}
 	}
 
-	/* TODO(wad) add optional arguments similar to gtest. */
-	printf("[==========] Running %u tests from %u test cases.\n",
+	results = mmap(NULL, sizeof(*results), PROT_READ | PROT_WRITE,
+		       MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+
+	ksft_print_header();
+	ksft_set_plan(test_count);
+	ksft_print_msg("Starting %u tests from %u test cases.\n",
 	       test_count, case_count);
 	for (f = __fixture_list; f; f = f->next) {
 		for (v = f->variant ?: &no_variant; v; v = v->next) {
 			for (t = f->tests; t; t = t->next) {
 				count++;
+				t->results = results;
 				__run_test(f, v, t);
+				t->results = NULL;
 				if (t->passed)
 					pass_count++;
 				else
···
 			}
 		}
 	}
-	printf("[==========] %u / %u tests passed.\n", pass_count, count);
-	printf("[  %s  ]\n", (ret ? "FAILED" : "PASSED"));
-	return ret;
+	munmap(results, sizeof(*results));
+
+	ksft_print_msg("%s: %u / %u tests passed.\n", ret ? "FAILED" : "PASSED",
+			pass_count, count);
+	ksft_exit(ret == 0);
+
+	/* unreachable */
+	return KSFT_FAIL;
 }
 
 static void __attribute__((constructor)) __constructor_order_first(void)

tools/testing/selftests/lib.mk

···
 all: $(TEST_GEN_PROGS) $(TEST_GEN_PROGS_EXTENDED) $(TEST_GEN_FILES)
 endif
 
-.ONESHELL:
 define RUN_TESTS
-	@BASE_DIR="$(selfdir)";			\
+	BASE_DIR="$(selfdir)";			\
 	. $(selfdir)/kselftest/runner.sh;	\
 	if [ "X$(summary)" != "X" ]; then       \
 		per_test_logging=1;		\
···
 
 run_tests: all
 ifdef building_out_of_srctree
-	@if [ "X$(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES)" != "X" ]; then
-		@rsync -aq $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT)
+	@if [ "X$(TEST_PROGS)$(TEST_PROGS_EXTENDED)$(TEST_FILES)" != "X" ]; then \
+		rsync -aq $(TEST_PROGS) $(TEST_PROGS_EXTENDED) $(TEST_FILES) $(OUTPUT); \
 	fi
-	@if [ "X$(TEST_PROGS)" != "X" ]; then
-		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(OUTPUT)/$(TEST_PROGS))
-	else
-		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS))
+	@if [ "X$(TEST_PROGS)" != "X" ]; then \
+		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(OUTPUT)/$(TEST_PROGS)) ; \
+	else \
+		$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS)); \
 	fi
 else
-	$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS))
+	@$(call RUN_TESTS, $(TEST_GEN_PROGS) $(TEST_CUSTOM_PROGS) $(TEST_PROGS))
 endif
 
 define INSTALL_SINGLE_RULE
 	$(if $(INSTALL_LIST),@mkdir -p $(INSTALL_PATH))
-	$(if $(INSTALL_LIST),@echo rsync -a $(INSTALL_LIST) $(INSTALL_PATH)/)
-	$(if $(INSTALL_LIST),@rsync -a $(INSTALL_LIST) $(INSTALL_PATH)/)
+	$(if $(INSTALL_LIST),rsync -a $(INSTALL_LIST) $(INSTALL_PATH)/)
 endef
 
 define INSTALL_RULE

tools/testing/selftests/pid_namespace/regression_enomem.c

···
 #include <syscall.h>
 #include <sys/wait.h>
 
-#include "../kselftest.h"
 #include "../kselftest_harness.h"
 #include "../pidfd/pidfd.h"
 

tools/testing/selftests/pidfd/pidfd_getfd_test.c

···
 #include <linux/kcmp.h>
 
 #include "pidfd.h"
-#include "../kselftest.h"
 #include "../kselftest_harness.h"
 
 /*

tools/testing/selftests/pidfd/pidfd_setns_test.c

···
 
 #include "pidfd.h"
 #include "../clone3/clone3_selftests.h"
-#include "../kselftest.h"
 #include "../kselftest_harness.h"
 
 enum {

tools/testing/selftests/pidfd/pidfd_test.c

···
 #include <sched.h>
 #include <signal.h>
 #include <stdio.h>
+#include <stdbool.h>
 #include <stdlib.h>
 #include <string.h>
 #include <syscall.h>
···
 #define CHILD_THREAD_MIN_WAIT 3 /* seconds */
 
 #define MAX_EVENTS 5
+
+static bool have_pidfd_send_signal;
 
 static pid_t pidfd_clone(int flags, int *pidfd, int (*fn)(void *))
 {
···
 	int pidfd, ret;
 	const char *test_name = "pidfd_send_signal send SIGUSR1";
 
+	if (!have_pidfd_send_signal) {
+		ksft_test_result_skip(
+			"%s test: pidfd_send_signal() syscall not supported\n",
+			test_name);
+		return 0;
+	}
+
 	pidfd = open("/proc/self", O_DIRECTORY | O_CLOEXEC);
 	if (pidfd < 0)
 		ksft_exit_fail_msg(
···
 	char buf[256];
 	pid_t pid;
 	const char *test_name = "pidfd_send_signal signal exited process";
+
+	if (!have_pidfd_send_signal) {
+		ksft_test_result_skip(
+			"%s test: pidfd_send_signal() syscall not supported\n",
+			test_name);
+		return 0;
+	}
 
 	pid = fork();
 	if (pid < 0)
···
 	pid_t pid1;
 	const char *test_name = "pidfd_send_signal signal recycled pid";
 
+	if (!have_pidfd_send_signal) {
+		ksft_test_result_skip(
+			"%s test: pidfd_send_signal() syscall not supported\n",
+			test_name);
+		return 0;
+	}
+
 	ret = unshare(CLONE_NEWPID);
-	if (ret < 0)
+	if (ret < 0) {
+		if (errno == EPERM) {
+			ksft_test_result_skip("%s test: Unsharing pid namespace not permitted\n",
+					      test_name);
+			return 0;
+		}
 		ksft_exit_fail_msg("%s test: Failed to unshare pid namespace\n",
 				   test_name);
+	}
 
 	ret = unshare(CLONE_NEWNS);
-	if (ret < 0)
-		ksft_exit_fail_msg(
-			"%s test: Failed to unshare mount namespace\n",
-			test_name);
+	if (ret < 0) {
+		if (errno == EPERM) {
+			ksft_test_result_skip("%s test: Unsharing mount namespace not permitted\n",
+					      test_name);
+			return 0;
+		}
+		ksft_exit_fail_msg("%s test: Failed to unshare mount namespace\n",
+				   test_name);
+	}
 
 	ret = mount(NULL, "/", NULL, MS_REC | MS_PRIVATE, 0);
 	if (ret < 0)
···
 
 	ret = sys_pidfd_send_signal(pidfd, 0, NULL, 0);
 	if (ret < 0) {
-		if (errno == ENOSYS)
-			ksft_exit_skip(
+		if (errno == ENOSYS) {
+			ksft_test_result_skip(
 				"%s test: pidfd_send_signal() syscall not supported\n",
 				test_name);
-
+			return 0;
+		}
 		ksft_exit_fail_msg("%s test: Failed to send signal\n",
 				   test_name);
 	}
 
+	have_pidfd_send_signal = true;
 	close(pidfd);
 	ksft_test_result_pass(
 		"%s test: pidfd_send_signal() syscall is supported. Tests can be executed\n",
···
 int main(int argc, char **argv)
 {
 	ksft_print_header();
-	ksft_set_plan(4);
+	ksft_set_plan(8);
 
 	test_pidfd_poll_exec(0);
 	test_pidfd_poll_exec(1);

tools/testing/selftests/sigaltstack/sas.c

···
 	swapcontext(&sc, &uc);
 	ksft_print_msg("%s\n", p->msg);
 	if (!p->flag) {
-		ksft_exit_skip("[RUN]\tAborting\n");
+		ksft_exit_fail_msg("[RUN]\tAborting\n");
 		exit(EXIT_FAILURE);
 	}
 }
···
 	err = sigaltstack(&stk, NULL);
 	if (err) {
 		if (errno == EINVAL) {
-			ksft_exit_skip(
+			ksft_test_result_skip(
 				"[NOTE]\tThe running kernel doesn't support SS_AUTODISARM\n");
 			/*
 			 * If test cases for the !SS_AUTODISARM variant were

tools/testing/selftests/sync/sync_test.c

···
 	int err;
 
 	ksft_print_header();
-	ksft_set_plan(3 + 7);
 
 	sync_api_supported();
+	ksft_set_plan(3 + 7);
 
 	ksft_print_msg("[RUN]\tTesting sync framework\n");
 

tools/testing/selftests/uevent/uevent_filtering.c

···
 #include <sys/wait.h>
 #include <unistd.h>
 
-#include "../kselftest.h"
 #include "../kselftest_harness.h"
 
 #define __DEV_FULL "/sys/devices/virtual/mem/full/uevent"