linux-kernel - [PATCH] serial/omap: mark wait_for_xmitr as __maybe

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Date:	Wed, 13 Jan 2016 21:59:23 +0100
From:	Arnd Bergmann <arnd@...db.de>
To:	linux-serial@...r.kernel.org
Cc:	gregkh@...uxfoundation.org, Jiri Slaby <jslaby@...e.com>,
	linux-kernel@...r.kernel.org, Denys Vlasenko <dvlasenk@...hat.com>,
	Peter Hurley <peter@...leysoftware.com>,
	linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org
Subject: [PATCH] serial/omap: mark wait_for_xmitr as __maybe_unused

The wait_for_xmitr() function is only used if CONFIG_CONSOLE_POLL
or CONFIG_SERIAL_OMAP_CONSOLE are set, but when both are disabled,
the compiler warns about it being unused:

drivers/tty/serial/omap-serial.c:1168:13: warning: 'wait_for_xmitr' defined but not used [-Wunused-func

We could add more #ifdefs to work around it, but adding __maybe_unused
seems nicer.

Signed-off-by: Arnd Bergmann <arnd@...db.de>
Fixes: 2172076d2399 ("serial/omap-serial: Deinline wait_for_xmitr, save 165 bytes")

diff --git a/drivers/tty/serial/omap-serial.c b/drivers/tty/serial/omap-serial.c
index b645f9228ed7..1434c7febc99 100644
--- a/drivers/tty/serial/omap-serial.c
+++ b/drivers/tty/serial/omap-serial.c
@@ -1165,7 +1165,7 @@ serial_omap_type(struct uart_port *port)
 
 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
 
-static void wait_for_xmitr(struct uart_omap_port *up)
+static void __maybe_unused wait_for_xmitr(struct uart_omap_port *up)
 {
 	unsigned int status, tmout = 10000;