linux-kernel - drivers/gpu/drm/rockchip/rockchip_vop_reg.c:1029:34: warning: unused variable 'vop_driver_dt

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Message-ID: <202108050451.007baLHz-lkp@intel.com>
Date:   Thu, 5 Aug 2021 04:17:01 +0800
From:   kernel test robot <lkp@...el.com>
To:     Robin Murphy <robin.murphy@....com>
Cc:     clang-built-linux@...glegroups.com, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Joerg Roedel <jroedel@...e.de>
Subject: drivers/gpu/drm/rockchip/rockchip_vop_reg.c:1029:34: warning: unused
 variable 'vop_driver_dt_match'

Hi Robin,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   d5ad8ec3cfb56a017de6a784835666475b4be349
commit: b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248 iommu: Tidy up Kconfig for SoC IOMMUs
date:   1 year, 1 month ago
config: x86_64-buildonly-randconfig-r001-20210804 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 4f71f59bf3d9914188a11d0c41bedbb339d36ff5)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout b4ceb4a5359ed1c9ba4a20acf3a70d4bbead3248
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> drivers/gpu/drm/rockchip/rockchip_vop_reg.c:1029:34: warning: unused variable 'vop_driver_dt_match' [-Wunused-const-variable]
   static const struct of_device_id vop_driver_dt_match[] = {
                                    ^
   1 warning generated.


vim +/vop_driver_dt_match +1029 drivers/gpu/drm/rockchip/rockchip_vop_reg.c

eb5cb6aa9a72a7 Mark Yao       2017-07-26  1028  
a67719d182291b Mark Yao       2015-12-15 @1029  static const struct of_device_id vop_driver_dt_match[] = {
f7673453506035 Mark Yao       2015-12-15  1030  	{ .compatible = "rockchip,rk3036-vop",
f7673453506035 Mark Yao       2015-12-15  1031  	  .data = &rk3036_vop },
460c3b0029923a Sandy Huang    2017-11-14  1032  	{ .compatible = "rockchip,rk3126-vop",
460c3b0029923a Sandy Huang    2017-11-14  1033  	  .data = &rk3126_vop },
570913e0b1bebe Sandy Huang    2018-06-26  1034  	{ .compatible = "rockchip,px30-vop-big",
570913e0b1bebe Sandy Huang    2018-06-26  1035  	  .data = &px30_vop_big },
570913e0b1bebe Sandy Huang    2018-06-26  1036  	{ .compatible = "rockchip,px30-vop-lit",
570913e0b1bebe Sandy Huang    2018-06-26  1037  	  .data = &px30_vop_lit },
f4a6de855eae10 Mark Yao       2018-12-29  1038  	{ .compatible = "rockchip,rk3066-vop",
f4a6de855eae10 Mark Yao       2018-12-29  1039  	  .data = &rk3066_vop },
428e15cc41e360 Heiko Stuebner 2018-08-30  1040  	{ .compatible = "rockchip,rk3188-vop",
428e15cc41e360 Heiko Stuebner 2018-08-30  1041  	  .data = &rk3188_vop },
b51502add7afc5 Mark Yao       2016-08-15  1042  	{ .compatible = "rockchip,rk3288-vop",
b51502add7afc5 Mark Yao       2016-08-15  1043  	  .data = &rk3288_vop },
eb5cb6aa9a72a7 Mark Yao       2017-07-26  1044  	{ .compatible = "rockchip,rk3368-vop",
eb5cb6aa9a72a7 Mark Yao       2017-07-26  1045  	  .data = &rk3368_vop },
eb5cb6aa9a72a7 Mark Yao       2017-07-26  1046  	{ .compatible = "rockchip,rk3366-vop",
eb5cb6aa9a72a7 Mark Yao       2017-07-26  1047  	  .data = &rk3366_vop },
0a63bfd046bbc8 Mark Yao       2016-04-20  1048  	{ .compatible = "rockchip,rk3399-vop-big",
0a63bfd046bbc8 Mark Yao       2016-04-20  1049  	  .data = &rk3399_vop_big },
0a63bfd046bbc8 Mark Yao       2016-04-20  1050  	{ .compatible = "rockchip,rk3399-vop-lit",
0a63bfd046bbc8 Mark Yao       2016-04-20  1051  	  .data = &rk3399_vop_lit },
eb5cb6aa9a72a7 Mark Yao       2017-07-26  1052  	{ .compatible = "rockchip,rk3228-vop",
eb5cb6aa9a72a7 Mark Yao       2017-07-26  1053  	  .data = &rk3228_vop },
eb5cb6aa9a72a7 Mark Yao       2017-07-26  1054  	{ .compatible = "rockchip,rk3328-vop",
eb5cb6aa9a72a7 Mark Yao       2017-07-26  1055  	  .data = &rk3328_vop },
a67719d182291b Mark Yao       2015-12-15  1056  	{},
a67719d182291b Mark Yao       2015-12-15  1057  };
a67719d182291b Mark Yao       2015-12-15  1058  MODULE_DEVICE_TABLE(of, vop_driver_dt_match);
a67719d182291b Mark Yao       2015-12-15  1059  

:::::: The code at line 1029 was first introduced by commit
:::::: a67719d182291bf62c6093545b9af27f0431cbeb drm/rockchip: vop: spilt register related into rockchip_reg_vop.c

:::::: TO: Mark Yao <mark.yao@...k-chips.com>
:::::: CC: Mark Yao <mark.yao@...k-chips.com>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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