linux-kernel - drivers/media/platform/imx-pxp.c:1747:34: warning: unused variable 'pxp_dt

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Date:   Mon, 2 Nov 2020 06:24:13 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: drivers/media/platform/imx-pxp.c:1747:34: warning: unused variable
 'pxp_dt_ids'

Hi Mauro,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   7b56fbd83e261484da43f04090bce07570bd117f
commit: a19f228b8dd9a67e8de4ebd4eac8a4c94ec39d1a media: Kconfig: not all V4L2 platform drivers are for camera
date:   7 months ago
config: x86_64-randconfig-a005-20201102 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 235dfcf70abca65dba5d80f1a42d1485bab8980c)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a19f228b8dd9a67e8de4ebd4eac8a4c94ec39d1a
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a19f228b8dd9a67e8de4ebd4eac8a4c94ec39d1a
        # 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/media/platform/imx-pxp.c:1747:34: warning: unused variable 'pxp_dt_ids' [-Wunused-const-variable]
   static const struct of_device_id pxp_dt_ids[] = {
                                    ^
   1 warning generated.
--
>> drivers/media/platform/s5p-jpeg/jpeg-core.c:3142:34: warning: unused variable 'samsung_jpeg_match' [-Wunused-const-variable]
   static const struct of_device_id samsung_jpeg_match[] = {
                                    ^
   1 warning generated.
--
   drivers/media/platform/mtk-mdp/mtk_mdp_core.c:139:15: warning: cast to smaller integer type 'enum mtk_mdp_comp_type' from 'const void *' [-Wvoid-pointer-to-enum-cast]
                   comp_type = (enum mtk_mdp_comp_type)of_id->data;
                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> drivers/media/platform/mtk-mdp/mtk_mdp_core.c:32:34: warning: unused variable 'mtk_mdp_comp_dt_ids' [-Wunused-const-variable]
   static const struct of_device_id mtk_mdp_comp_dt_ids[] = {
                                    ^
   2 warnings generated.

vim +/pxp_dt_ids +1747 drivers/media/platform/imx-pxp.c

51abcf7fdb70b8 Philipp Zabel 2018-09-06  1746  
51abcf7fdb70b8 Philipp Zabel 2018-09-06 @1747  static const struct of_device_id pxp_dt_ids[] = {
51abcf7fdb70b8 Philipp Zabel 2018-09-06  1748  	{ .compatible = "fsl,imx6ull-pxp", .data = NULL },
51abcf7fdb70b8 Philipp Zabel 2018-09-06  1749  	{ },
51abcf7fdb70b8 Philipp Zabel 2018-09-06  1750  };
51abcf7fdb70b8 Philipp Zabel 2018-09-06  1751  MODULE_DEVICE_TABLE(of, pxp_dt_ids);
51abcf7fdb70b8 Philipp Zabel 2018-09-06  1752  

:::::: The code at line 1747 was first introduced by commit
:::::: 51abcf7fdb70b82b7f8a7c177271f29aed9866bd media: imx-pxp: add i.MX Pixel Pipeline driver

:::::: TO: Philipp Zabel <p.zabel@...gutronix.de>
:::::: CC: Mauro Carvalho Chehab <mchehab+samsung@...nel.org>

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

Download attachment ".config.gz" of type "application/gzip" (42951 bytes)