linux-kernel - drivers/block/zram/zram_drv.c:1824:45: warning: unused variable 'zram_wb

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Date:   Fri, 26 Nov 2021 16:54:17 +0800
From:   kernel test robot <lkp@...el.com>
To:     Christoph Hellwig <hch@....de>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
        Jan Kara <jack@...e.cz>,
        Johannes Thumshirn <johannes.thumshirn@....com>
Subject: drivers/block/zram/zram_drv.c:1824:45: warning: unused variable
 'zram_wb_devops'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   a4849f6000e29235a2707f22e39da6b897bb9543
commit: a8b456d01cd6b37191f14248f3e2bdbe5ce3a89e bdi: remove BDI_CAP_SYNCHRONOUS_IO
date:   1 year, 2 months ago
config: x86_64-buildonly-randconfig-r003-20211116 (https://download.01.org/0day-ci/archive/20211126/202111261614.gCJMqcyh-lkp@intel.com/config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project fbe72e41b99dc7994daac300d208a955be3e4a0a)
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=a8b456d01cd6b37191f14248f3e2bdbe5ce3a89e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a8b456d01cd6b37191f14248f3e2bdbe5ce3a89e
        # save the config file to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 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/block/zram/zram_drv.c:1824:45: warning: unused variable 'zram_wb_devops' [-Wunused-const-variable]
   static const struct block_device_operations zram_wb_devops = {
                                               ^
   1 warning generated.


vim +/zram_wb_devops +1824 drivers/block/zram/zram_drv.c

  1823	
> 1824	static const struct block_device_operations zram_wb_devops = {
  1825		.open = zram_open,
  1826		.submit_bio = zram_submit_bio,
  1827		.swap_slot_free_notify = zram_slot_free_notify,
  1828		.owner = THIS_MODULE
  1829	};
  1830	

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