linux-kernel - drivers/ata/ahci_st.c:229:34: warning: unused variable 'st_ahci

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Date:   Wed, 12 Oct 2022 14:37:11 +0800
From:   kernel test robot <lkp@...el.com>
To:     Damien Le Moal <damien.lemoal@...nsource.wdc.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: drivers/ata/ahci_st.c:229:34: warning: unused variable
 'st_ahci_match'

Hi Damien,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   49da070062390094112b423ba443ea193527b2e4
commit: ecf8322f464d62759d838ea62cdeff6966a60134 ata: ahci_st: Enable compile test
date:   3 weeks ago
config: mips-randconfig-r023-20221012
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 791a7ae1ba3efd6bca96338e10ffde557ba83920)
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 mips cross compiling tool for clang build
        # apt-get install binutils-mipsel-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ecf8322f464d62759d838ea62cdeff6966a60134
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout ecf8322f464d62759d838ea62cdeff6966a60134
        # 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=mips SHELL=/bin/bash drivers/ata/

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 >>):

>> drivers/ata/ahci_st.c:229:34: warning: unused variable 'st_ahci_match' [-Wunused-const-variable]
   static const struct of_device_id st_ahci_match[] = {
                                    ^
   1 warning generated.


vim +/st_ahci_match +229 drivers/ata/ahci_st.c

76884cb2f7da52 Lee Jones          2014-02-26  228  
09de99db23df55 Kiran Padwal       2014-07-22 @229  static const struct of_device_id st_ahci_match[] = {
76884cb2f7da52 Lee Jones          2014-02-26  230  	{ .compatible = "st,ahci", },
5e776d7b20f040 Geert Uytterhoeven 2022-03-03  231  	{ /* sentinel */ }
76884cb2f7da52 Lee Jones          2014-02-26  232  };
76884cb2f7da52 Lee Jones          2014-02-26  233  MODULE_DEVICE_TABLE(of, st_ahci_match);
76884cb2f7da52 Lee Jones          2014-02-26  234  

:::::: The code at line 229 was first introduced by commit
:::::: 09de99db23df55c7415d110f6c62281dedd77384 ahci: st: Make of_device_id array const

:::::: TO: Kiran Padwal <kiran.padwal21@...il.com>
:::::: CC: Tejun Heo <tj@...nel.org>

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

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