serial: stm32: Use __maybe_unused instead of #if CONFIG_PM_SLEEP

Use __maybe_unused for power management related functionsinstead of

fixes: 270e5a74fe4c ("serial: stm32: add wakeup mechanism")
Signed-off-by: Erwan Le Ray <erwan.leray@st.com>
Link: https://lore.kernel.org/r/1560433800-12255-6-git-send-email-erwan.leray@st.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/tty/serial/stm32-usart.c b/drivers/tty/serial/stm32-usart.c
index 6ddc6b08b29a1d6457de8e95d2ad86ac7056041f..45dbc42e15b9074e9f155b10ce403d331f633931 100644 (file)
--- a/drivers/tty/serial/stm32-usart.c
+++ b/drivers/tty/serial/stm32-usart.c
@@ -1351,8 +1351,8 @@ static struct uart_driver stm32_usart_driver = {
        .cons           = STM32_SERIAL_CONSOLE,
 };
 
-#ifdef CONFIG_PM_SLEEP
-static void stm32_serial_enable_wakeup(struct uart_port *port, bool enable)
+static void __maybe_unused stm32_serial_enable_wakeup(struct uart_port *port,
+                                                     bool enable)
 {
        struct stm32_port *stm32_port = to_stm32_port(port);
        struct stm32_usart_offsets *ofs = &stm32_port->info->ofs;
@@ -1376,7 +1376,7 @@ static void stm32_serial_enable_wakeup(struct uart_port *port, bool enable)
        }
 }
 
-static int stm32_serial_suspend(struct device *dev)
+static int __maybe_unused stm32_serial_suspend(struct device *dev)
 {
        struct uart_port *port = dev_get_drvdata(dev);
 
@@ -1392,7 +1392,7 @@ static int stm32_serial_suspend(struct device *dev)
        return 0;
 }
 
-static int stm32_serial_resume(struct device *dev)
+static int __maybe_unused stm32_serial_resume(struct device *dev)
 {
        struct uart_port *port = dev_get_drvdata(dev);
 
@@ -1403,7 +1403,6 @@ static int stm32_serial_resume(struct device *dev)
 
        return uart_resume_port(&stm32_usart_driver, port);
 }
-#endif /* CONFIG_PM_SLEEP */
 
 static int __maybe_unused stm32_serial_runtime_suspend(struct device *dev)
 {