linux-kernel - Re: [PATCH v11 3/5] mfd: Add driver for RAVE Supervisory Processor

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Date:   Thu, 9 Nov 2017 06:09:32 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org,
        Andrey Smirnov <andrew.smirnov@...il.com>, cphealy@...il.com,
        Lucas Stach <l.stach@...gutronix.de>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        Lee Jones <lee.jones@...aro.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Pavel Machek <pavel@....cz>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Guenter Roeck <linux@...ck-us.net>,
        Rob Herring <robh@...nel.org>, Johan Hovold <johan@...nel.org>,
        Sebastian Reichel <sebastian.reichel@...labora.co.uk>
Subject: Re: [PATCH v11 3/5] mfd: Add driver for RAVE Supervisory Processor

Hi Andrey,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v4.14-rc8]
[cannot apply to next-20171108]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Andrey-Smirnov/ZII-RAVE-platform-driver/20171109-033941
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

   drivers/mfd/rave-sp.c: In function 'csum_ccitt':
>> drivers/mfd/rave-sp.c:237:25: error: implicit declaration of function 'crc_ccitt_false' [-Werror=implicit-function-declaration]
     const u16 calculated = crc_ccitt_false(0xffff, buf, size);
                            ^~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/crc_ccitt_false +237 drivers/mfd/rave-sp.c

   234	
   235	static void csum_ccitt(const u8 *buf, size_t size, u8 *crc)
   236	{
 > 237		const u16 calculated = crc_ccitt_false(0xffff, buf, size);
   238	
   239		/*
   240		 * While the rest of the wire protocol is little-endian,
   241		 * CCITT-16 CRC in RDU2 device is sent out in big-endian order.
   242		 */
   243		put_unaligned_be16(calculated, crc);
   244	}
   245	

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