[PATCH] serial: core: Fix unused variable warnings from uart_console()

[Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>]

If CONFIG_SERIAL_CORE_CONSOLE=n, build warnings are generated by
uart_console() macro expansion:

drivers/tty/serial/of_serial.c: In function ‘of_serial_suspend_8250’:
drivers/tty/serial/of_serial.c:262:20: warning: unused variable ‘port’ [-Wunused-variable]
  struct uart_port *port = &port8250->port;
                    ^
drivers/tty/serial/of_serial.c: In function ‘of_serial_resume_8250’:
drivers/tty/serial/of_serial.c:272:20: warning: unused variable ‘port’ [-Wunused-variable]
  struct uart_port *port = &port8250->port;

Signed-off-by: Peter Hurley <peter@xxxxxxxxxxxxxxxxxx>
---
 include/linux/serial_core.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/serial_core.h b/include/linux/serial_core.h
index 16ee372..8c03f9f 100644
--- a/include/linux/serial_core.h
+++ b/include/linux/serial_core.h
@@ -35,7 +35,7 @@
 #define uart_console(port) \
 	((port)->cons && (port)->cons->index == (port)->line)
 #else
-#define uart_console(port)      (0)
+#define uart_console(port)      ({ (void)port; 0; })
 #endif
 
 struct uart_port;
-- 
2.3.5

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