diff --git a/tools/testing/selftests/mm/folio_split_race_test.c b/tools/testing/selftests/mm/folio_split_race_test.c
index 45b84f7b364e..1960635a953e 100644
--- a/tools/testing/selftests/mm/folio_split_race_test.c
+++ b/tools/testing/selftests/mm/folio_split_race_test.c
@@ -269,6 +269,4 @@ int main(void)
 				      NUM_ITERATIONS);
 
 	ksft_exit(iter == NUM_ITERATIONS);
-
-	return 0;
 }
diff --git a/tools/testing/selftests/mm/mlock-random-test.c b/tools/testing/selftests/mm/mlock-random-test.c
index 16294bc7dae6..58772914fd79 100644
--- a/tools/testing/selftests/mm/mlock-random-test.c
+++ b/tools/testing/selftests/mm/mlock-random-test.c
@@ -71,7 +71,6 @@ int get_proc_locked_vm_size(void)
 
 	fclose(f);
 	ksft_exit_fail_msg("cannot parse VmLck in /proc/self/status: %s\n", strerror(errno));
-	return -1;
 }
 
 /*
diff --git a/tools/testing/selftests/mm/pkey_sighandler_tests.c b/tools/testing/selftests/mm/pkey_sighandler_tests.c
index 74bf79a5399d..f9c728ba96a5 100644
--- a/tools/testing/selftests/mm/pkey_sighandler_tests.c
+++ b/tools/testing/selftests/mm/pkey_sighandler_tests.c
@@ -556,5 +556,4 @@ int main(int argc, char *argv[])
 	}
 
 	ksft_finished();
-	return 0;
 }
diff --git a/tools/testing/selftests/mm/split_huge_page_test.c b/tools/testing/selftests/mm/split_huge_page_test.c
index 86a603692826..c01d227d7fd6 100644
--- a/tools/testing/selftests/mm/split_huge_page_test.c
+++ b/tools/testing/selftests/mm/split_huge_page_test.c
@@ -101,7 +101,6 @@ static bool is_backed_by_folio(char *vaddr, int order, int pagemap_fd,
 	return (pfn_flags & folio_tail_flags) != folio_tail_flags;
 fail:
 	ksft_exit_fail_msg("Failed to get folio info\n");
-	return false;
 }
 
 static int check_after_split_folio_orders(char *vaddr_start, size_t len,
@@ -548,7 +547,6 @@ static int create_pagecache_thp_and_fd(const char *testfile, size_t fd_size,
 err_out_unlink:
 	unlink(testfile);
 	ksft_exit_fail_msg("Failed to create large pagecache folios\n");
-	return -1;
 }
 
 static void split_thp_in_pagecache_to_order_at(size_t fd_size,
@@ -711,6 +709,4 @@ int main(int argc, char **argv)
 	free(expected_orders);
 
 	ksft_finished();
-
-	return 0;
 }