linux-kernel - Re: [PATCH v3 1/3] tty: serial core: provide a method to search uart by phandle

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Date:	Sat, 17 Oct 2015 02:47:18 +0800
From:	kbuild test robot <lkp@...el.com>
To:	"H. Nikolaus Schaller" <hns@...delico.com>
Cc:	kbuild-all@...org, Jiri Slaby <jslaby@...e.cz>,
	Arnd Bergmann <arnd@...db.de>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Jonathan Corbet <corbet@....net>,
	Sergei Zviagintsev <sergei@...v.net>,
	Peter Hurley <peter@...leysoftware.com>,
	One Thousand Gnomes <gnomes@...rguk.ukuu.org.uk>,
	Sebastian Reichel <sre@...nel.org>,
	NeilBrown <neil@...wn.name>,
	Grant Likely <grant.likely@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>,
	linux-serial@...r.kernel.org, Marek Belisko <marek@...delico.com>,
	devicetree@...r.kernel.org, linux-doc@...r.kernel.org,
	"H. Nikolaus Schaller" <hns@...delico.com>
Subject: Re: [PATCH v3 1/3] tty: serial core: provide a method to search uart
 by phandle

Hi Nikolaus,

[auto build test WARNING on tty/tty-next -- if it's inappropriate base, please suggest rules for selecting the more suitable base]

url:    https://github.com/0day-ci/linux/commits/H-Nikolaus-Schaller/UART-slave-device-support-goldelico-version/20151017-021238
config: i386-randconfig-s1-201541 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All warnings (new ones prefixed by >>):

   drivers/tty/serial/serial_core.c: In function 'devm_serial_uart_release':
>> drivers/tty/serial/serial_core.c:64:20: warning: unused variable 'uart' [-Wunused-variable]
     struct uart_port *uart = *(struct uart_port **)res;
                       ^

vim +/uart +64 drivers/tty/serial/serial_core.c

    48	
    49		if (!of_device_is_available(node))
    50			return ERR_PTR(-ENODEV);
    51	
    52		list_for_each_entry(uart, &uart_list, head) {
    53			if (node != uart->dev->of_node)
    54				continue;
    55	
    56			return uart;
    57		}
    58	
    59		return ERR_PTR(-EPROBE_DEFER);
    60	}
    61	
    62	static void devm_serial_uart_release(struct device *dev, void *res)
    63	{
  > 64		struct uart_port *uart = *(struct uart_port **)res;
    65	
    66		/* FIXME: I don't understand the serial subsystem well enough
    67		 * to know if we should call serial_put_uart(uart); here
    68		 */
    69	}
    70	
    71	/*
    72	 * This is used to lock changes in serial line configuration.

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Download attachment ".config.gz" of type "application/octet-stream" (24816 bytes)