Re: [linux-stable-rc:linux-4.14.y 9935/9999] drivers/staging/vc04_services/bcm2835-camera/controls.c:62:18: warning: variable 'mains_freq_qmenu' is not needed and will not be emitted

[Philip Li <philip.li@intel.com>]

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On Fri, Apr 03, 2020 at 09:12:39PM -0700, Nathan Chancellor wrote:
> On Sat, Apr 04, 2020 at 11:46:06AM +0800, kbuild test robot wrote:
> > Hi Dirk,
> > 
> > First bad commit (maybe != root cause):
> > 
> > tree:   https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git linux-4.14.y
> > head:   e0066de56999ad01b6367b6a42064233ad8bc932
> > commit: 88f7a6aa7fb9aa5076b65489146045dac865f1d3 [9935/9999] scripts/dtc: Remove redundant YYLOC global declaration
> > config: x86_64-randconfig-b002-20200403 (attached as .config)
> > compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project f68cc2a7ed766965028b8b0f0d9300a0460c3cf1)
> > reproduce:
> >         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >         chmod +x ~/bin/make.cross
> >         git checkout 88f7a6aa7fb9aa5076b65489146045dac865f1d3
> >         # save the attached .config to linux build tree
> >         COMPILER=clang make.cross ARCH=x86_64 
> > 
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kbuild test robot <lkp@intel.com>
> > 
> > All warnings (new ones prefixed by >>):
> > 
> > >> drivers/staging/vc04_services/bcm2835-camera/controls.c:62:18: warning: variable 'mains_freq_qmenu' is not needed and will not be emitted [-Wunneeded-internal-declaration]
> >    static const s64 mains_freq_qmenu[] = {
> >                     ^
> >    1 warning generated.
> > 
> > vim +/mains_freq_qmenu +62 drivers/staging/vc04_services/bcm2835-camera/controls.c
> > 
> > 7b3ad5abf027b76 drivers/staging/media/platform/bcm2835/controls.c Eric Anholt 2017-01-27  61  
> > 7b3ad5abf027b76 drivers/staging/media/platform/bcm2835/controls.c Eric Anholt 2017-01-27 @62  static const s64 mains_freq_qmenu[] = {
> > 7b3ad5abf027b76 drivers/staging/media/platform/bcm2835/controls.c Eric Anholt 2017-01-27  63  	V4L2_CID_POWER_LINE_FREQUENCY_DISABLED,
> > 7b3ad5abf027b76 drivers/staging/media/platform/bcm2835/controls.c Eric Anholt 2017-01-27  64  	V4L2_CID_POWER_LINE_FREQUENCY_50HZ,
> > 7b3ad5abf027b76 drivers/staging/media/platform/bcm2835/controls.c Eric Anholt 2017-01-27  65  	V4L2_CID_POWER_LINE_FREQUENCY_60HZ,
> > 7b3ad5abf027b76 drivers/staging/media/platform/bcm2835/controls.c Eric Anholt 2017-01-27  66  	V4L2_CID_POWER_LINE_FREQUENCY_AUTO
> > 7b3ad5abf027b76 drivers/staging/media/platform/bcm2835/controls.c Eric Anholt 2017-01-27  67  };
> > 7b3ad5abf027b76 drivers/staging/media/platform/bcm2835/controls.c Eric Anholt 2017-01-27  68  
> > 
> > :::::: The code at line 62 was first introduced by commit
> > :::::: 7b3ad5abf027b7643b38c4006d7f4ce47a86dd3a staging: Import the BCM2835 MMAL-based V4L2 camera driver.
> > 
> > :::::: TO: Eric Anholt <eric@anholt.net>
> > :::::: CC: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> > 
> > ---
> > 0-DAY CI Kernel Test Service, Intel Corporation
> > https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
> 
> Obviously not causes by that patch... Is there any way for 0day to
> blacklist that patch as being a problem so that it stops sending emails
> to the patch author?
Got it, we will blacklist this warning, meanwhile to check the bisection
to see anything we can do better.

> 
> I did solve this warning a while ago, it just never got backported to
> 4.14: https://git.kernel.org/linus/9e3701b3809ab3ef22235c96ea69510e26d18d30
> 
> Cheers,
> Nathan
>