linux-kernel - drivers/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:1175:34: warning: unused variable 'c8sectpfe

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Date:   Sun, 14 Aug 2022 08:52:28 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mauro Carvalho Chehab <mchehab@...nel.org>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: drivers/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:1175:34:
 warning: unused variable 'c8sectpfe_match'

Hi Mauro,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   f6eb0fed6a3957c0b93e3a00c1ffaad84d4ffc31
commit: e7b8153e2a4f0c9c8d1450aa7328d54ea64fe8b2 media: platform: place stm32/ and sti/ under st/ dir
date:   5 months ago
config: arm-buildonly-randconfig-r006-20220814 (https://download.01.org/0day-ci/archive/20220814/202208140854.Q1rRgjPy-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 3329cec2f79185bafd678f310fafadba2a8c76d2)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e7b8153e2a4f0c9c8d1450aa7328d54ea64fe8b2
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout e7b8153e2a4f0c9c8d1450aa7328d54ea64fe8b2
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash drivers/media/platform/st/sti/c8sectpfe/

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

All warnings (new ones prefixed by >>):

   In file included from drivers/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:18:
   include/uapi/linux/dvb/frontend.h:805:2: warning: field  within 'struct dtv_stats' is less aligned than 'union dtv_stats::(anonymous at include/uapi/linux/dvb/frontend.h:805:2)' and is usually due to 'struct dtv_stats' being packed, which can lead to unaligned accesses [-Wunaligned-access]
           union {
           ^
>> drivers/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c:1175:34: warning: unused variable 'c8sectpfe_match' [-Wunused-const-variable]
   static const struct of_device_id c8sectpfe_match[] = {
                                    ^
   2 warnings generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for ARM_CPU_SUSPEND
   Depends on [n]: ARCH_SUSPEND_POSSIBLE [=n]
   Selected by [y]:
   - ARM_QCOM_SPM_CPUIDLE [=y] && CPU_IDLE [=y] && (ARM [=y] || ARM64) && (ARCH_QCOM [=n] || COMPILE_TEST [=y]) && !ARM64 && MMU [=y]


vim +/c8sectpfe_match +1175 drivers/media/platform/st/sti/c8sectpfe/c8sectpfe-core.c

c5f5d0f99794cfb drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30  1174  
c5f5d0f99794cfb drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30 @1175  static const struct of_device_id c8sectpfe_match[] = {
c5f5d0f99794cfb drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30  1176  	{ .compatible = "st,stih407-c8sectpfe" },
c5f5d0f99794cfb drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30  1177  	{ /* sentinel */ },
c5f5d0f99794cfb drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30  1178  };
c5f5d0f99794cfb drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30  1179  MODULE_DEVICE_TABLE(of, c8sectpfe_match);
c5f5d0f99794cfb drivers/media/platform/sti/c8sectpfe/c8sectpfe-core.c Peter Griffin 2015-07-30  1180  

:::::: The code at line 1175 was first introduced by commit
:::::: c5f5d0f99794cfb675ecacfe37a1b33b352b9752 [media] c8sectpfe: STiH407/10 Linux DVB demux support

:::::: TO: Peter Griffin <peter.griffin@...aro.org>
:::::: CC: Mauro Carvalho Chehab <mchehab@....samsung.com>

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp