selftests/ipc: ksft_exit functions do not return

After commit f7d5bcd3 ("selftests: kselftest: Mark functions that
unconditionally call exit() as __noreturn"), ksft_exit_...() functions
are marked as __noreturn, which means the return type should not be
'int' but 'void' because they are not returning anything (and never were
since exit() has always been called).

To facilitate updating the return type of these functions, remove
'return' before the calls to ksft_exit_...(), as __noreturn prevents the
compiler from warning that a caller of the ksft_exit functions does not
return a value because the program will terminate upon calling these
functions.
Reviewed-by: Muhammad Usama Anjum <usama.anjum@collabora.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>

tools/testing/selftests/ipc/msgque.c

@@ -198,13 +198,12 @@ int main(int argc, char **argv)
 	struct msgque_data msgque;
 
 	if (getuid() != 0)
-		return ksft_exit_skip(
-				"Please run the test as root - Exiting.\n");
+		ksft_exit_skip("Please run the test as root - Exiting.\n");
 
 	msgque.key = ftok(argv[0], 822155650);
 	if (msgque.key == -1) {
 		printf("Can't make key: %d\n", -errno);
-		return ksft_exit_fail();
+		ksft_exit_fail();
 	}
 
 	msgque.msq_id = msgget(msgque.key, IPC_CREAT | IPC_EXCL | 0666);
@@ -243,13 +242,13 @@ int main(int argc, char **argv)
 		printf("Failed to test queue: %d\n", err);
 		goto err_out;
 	}
-	return ksft_exit_pass();
+	ksft_exit_pass();
 
 err_destroy:
 	if (msgctl(msgque.msq_id, IPC_RMID, NULL)) {
 		printf("Failed to destroy queue: %d\n", -errno);
-		return ksft_exit_fail();
+		ksft_exit_fail();
 	}
 err_out:
-	return ksft_exit_fail();
+	ksft_exit_fail();
 }