The style guide recommends IS_ENABLED rather than ifdef for wrapping conditional code wherever possible. Functions that are only called on DeviceTree platforms would otherwise need to be cluttered up with __maybe_unused, which is especially undesireable if there's nothing inherently DT-specific about those functions. Signed-off-by: Dennis Lambe Jr <dennis@xxxxxxxxxxxxxx> --- drivers/rtc/rtc-m41t80.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/rtc/rtc-m41t80.c b/drivers/rtc/rtc-m41t80.c index 494052dbd39f..f963b76e5fc0 100644 --- a/drivers/rtc/rtc-m41t80.c +++ b/drivers/rtc/rtc-m41t80.c @@ -909,10 +909,11 @@ static int m41t80_probe(struct i2c_client *client) if (IS_ERR(m41t80_data->rtc)) return PTR_ERR(m41t80_data->rtc); -#ifdef CONFIG_OF - wakeup_source = of_property_read_bool(client->dev.of_node, - "wakeup-source"); -#endif + if (IS_ENABLED(CONFIG_OF)) { + wakeup_source = of_property_read_bool(client->dev.of_node, + "wakeup-source"); + } + if (client->irq > 0) { rc = devm_request_threaded_irq(&client->dev, client->irq, NULL, m41t80_handle_irq, -- 2.25.1