linux-kernel - Re: [PATCH v7] staging: adis16060_core: Replace mlock with buf

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Message-ID: <201703230313.COe3PSCe%fengguang.wu@intel.com>
Date:   Thu, 23 Mar 2017 04:00:53 +0800
From:   kbuild test robot <lkp@...el.com>
To:     simran singhal <singhalsimran0@...il.com>
Cc:     kbuild-all@...org, lars@...afoo.de, devel@...verdev.osuosl.org,
        Michael.Hennerich@...log.com, linux-iio@...r.kernel.org,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-kernel@...r.kernel.org, outreachy-kernel@...glegroups.com,
        Peter Meerwald-Stadler <pmeerw@...erw.net>,
        Hartmut Knaack <knaack.h@....de>, jic23@...nel.org
Subject: Re: [PATCH v7] staging: adis16060_core: Replace mlock with buf_lock
 and refactor code

Hi simran,

[auto build test WARNING on iio/togreg]
[also build test WARNING on v4.11-rc3 next-20170322]
[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/simran-singhal/staging-adis16060_core-Replace-mlock-with-buf_lock-and-refactor-code/20170323-031726
base:   https://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio.git togreg
config: x86_64-randconfig-s0-03230201 (attached as .config)
compiler: gcc-4.4 (Debian 4.4.7-8) 4.4.7
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   drivers/staging/iio/gyro/adis16060_core.c: In function 'adis16060_read_raw':
>> drivers/staging/iio/gyro/adis16060_core.c:79: warning: unused variable 'st'

vim +/st +79 drivers/staging/iio/gyro/adis16060_core.c

    63		if (!ret)
    64			*val = ((st->buf[0] & 0x3) << 12) |
    65				 (st->buf[1] << 4) |
    66				 ((st->buf[2] >> 4) & 0xF);
    67		mutex_unlock(&st->buf_lock);
    68	
    69		return ret;
    70	}
    71	
    72	static int adis16060_read_raw(struct iio_dev *indio_dev,
    73				      struct iio_chan_spec const *chan,
    74				      int *val, int *val2,
    75				      long mask)
    76	{
    77		u16 tval = 0;
    78		int ret;
  > 79		struct adis16060_state *st = iio_priv(indio_dev);
    80	
    81		switch (mask) {
    82		case IIO_CHAN_INFO_RAW:
    83			ret = adis16060_spi_write_than_read(indio_dev,
    84							    chan->address, &tval);
    85			if (ret < 0)
    86				return ret;
    87	

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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