selftests/powerpc: Return errors from all tests

Fix some tests which weren't returning an error code from main.

Although these tests only ever return success, they can still fail if
they time out and the harness kills them. If that happens they still
return success to the shell, which is incorrect and confuses the higher
level error reporting.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://patch.msgid.link/20241106130453.1741013-4-mpe@ellerman.id.au

Author: mpe

tools/testing/selftests/powerpc/signal/sigfuz.c

@@ -321,5 +321,5 @@ int main(int argc, char **argv)
 	if (!args)
 		args = ARG_COMPLETE;
 
-	test_harness(signal_fuzzer, "signal_fuzzer");
+	return test_harness(signal_fuzzer, "signal_fuzzer");
 }

tools/testing/selftests/powerpc/tm/tm-signal-context-force-tm.c

@@ -176,5 +176,5 @@ int tm_signal_context_force_tm(void)
 
 int main(int argc, char **argv)
 {
-	test_harness(tm_signal_context_force_tm, "tm_signal_context_force_tm");
+	return test_harness(tm_signal_context_force_tm, "tm_signal_context_force_tm");
 }

tools/testing/selftests/powerpc/tm/tm-signal-sigreturn-nt.c

@@ -46,6 +46,5 @@ int tm_signal_sigreturn_nt(void)
 
 int main(int argc, char **argv)
 {
-	test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt");
+	return test_harness(tm_signal_sigreturn_nt, "tm_signal_sigreturn_nt");
 }
-