linux-kernel - Re: [PATCH] Staging: comedidev.h comedi

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Message-ID: <201704100006.daKgJqSb%fengguang.wu@intel.com>
Date:   Mon, 10 Apr 2017 00:22:28 +0800
From:   kbuild test robot <lkp@...el.com>
To:     "Arthur Brainville (Ybalrid)" <ybalrid@...lrid.info>
Cc:     kbuild-all@...org, abbotti@....co.uk, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org,
        "Arthur Brainville (Ybalrid)" <ybalrid@...lrid.info>
Subject: Re: [PATCH] Staging: comedidev.h comedi_lrange should be const struct

Hi Arthur,

[auto build test WARNING on staging/staging-testing]
[also build test WARNING on v4.11-rc5 next-20170407]
[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/Arthur-Brainville-Ybalrid/Staging-comedidev-h-comedi_lrange-should-be-const-struct/20170409-224503
config: x86_64-allyesdebian (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

   In file included from drivers/staging/comedi/comedi_fops.c:34:0:
>> drivers/staging/comedi/comedidev.h:629:1: warning: useless type qualifier in empty declaration
    };
    ^

vim +629 drivers/staging/comedi/comedidev.h

ed9eccbe8 David Schleef               2008-11-04  613  #define range_digital		range_unipolar5
ed9eccbe8 David Schleef               2008-11-04  614  
5459bc128 Ian Abbott                  2015-09-21  615  /**
5459bc128 Ian Abbott                  2015-09-21  616   * struct comedi_lrange - Describes a COMEDI range table
5459bc128 Ian Abbott                  2015-09-21  617   * @length: Number of entries in the range table.
5459bc128 Ian Abbott                  2015-09-21  618   * @range: Array of &struct comedi_krange, one for each range.
5459bc128 Ian Abbott                  2015-09-21  619   *
5459bc128 Ian Abbott                  2015-09-21  620   * Each element of @range[] describes the minimum and maximum physical range
5459bc128 Ian Abbott                  2015-09-21  621   * range and the type of units.  Typically, the type of unit is %UNIT_volt
5459bc128 Ian Abbott                  2015-09-21  622   * (i.e. volts) and the minimum and maximum are in millionths of a volt.
5459bc128 Ian Abbott                  2015-09-21  623   * There may also be a flag that indicates the minimum and maximum are merely
5459bc128 Ian Abbott                  2015-09-21  624   * scale factors for an unknown, external reference.
5459bc128 Ian Abbott                  2015-09-21  625   */
540e454c2 Arthur Brainville (Ybalrid  2017-04-09  626) const struct comedi_lrange {
ed9eccbe8 David Schleef               2008-11-04  627  	int length;
3358a0ca2 Cheah Kok Cheong            2016-12-22  628  	struct comedi_krange range[];
ed9eccbe8 David Schleef               2008-11-04 @629  };
ed9eccbe8 David Schleef               2008-11-04  630  
42e558399 Ian Abbott                  2015-09-21  631  /**
42e558399 Ian Abbott                  2015-09-21  632   * comedi_range_is_bipolar() - Test if subdevice range is bipolar
42e558399 Ian Abbott                  2015-09-21  633   * @s: COMEDI subdevice.
42e558399 Ian Abbott                  2015-09-21  634   * @range: Index of range within a range table.
42e558399 Ian Abbott                  2015-09-21  635   *
42e558399 Ian Abbott                  2015-09-21  636   * Tests whether a range is bipolar by checking whether its minimum value
42e558399 Ian Abbott                  2015-09-21  637   * is negative.

:::::: The code at line 629 was first introduced by commit
:::::: ed9eccbe8970f6eedc1b978c157caf1251a896d4 Staging: add comedi core

:::::: TO: David Schleef <ds@...leef.org>
:::::: CC: Greg Kroah-Hartman <gregkh@...e.de>

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