linux-kernel - drivers/acpi/proc.c:139:30: warning: 'acpi_system_wakeup_device_proc

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Date:   Fri, 9 Jun 2023 04:26:03 +0800
From:   kernel test robot <lkp@...el.com>
To:     Alexey Dobriyan <adobriyan@...il.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        Andrew Morton <akpm@...ux-foundation.org>,
        Linux Memory Management List <linux-mm@...ck.org>
Subject: drivers/acpi/proc.c:139:30: warning:
 'acpi_system_wakeup_device_proc_ops' defined but not used

Hi Alexey,

FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   25041a4c02c7cf774d8b6ed60586fd64f1cdaa81
commit: 97a32539b9568bb653683349e5a76d02ff3c3e2c proc: convert everything to "struct proc_ops"
date:   3 years, 4 months ago
config: i386-buildonly-randconfig-r003-20230608 (https://download.01.org/0day-ci/archive/20230609/202306090452.xsDyLQQZ-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=97a32539b9568bb653683349e5a76d02ff3c3e2c
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout 97a32539b9568bb653683349e5a76d02ff3c3e2c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        make W=1 O=build_dir ARCH=i386 olddefconfig
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash drivers/acpi/ drivers/gpu/drm/ drivers/mtd/nand/raw/ fs/nfsd/ kernel/ net/sunrpc/

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306090452.xsDyLQQZ-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/acpi/proc.c:139:30: warning: 'acpi_system_wakeup_device_proc_ops' defined but not used [-Wunused-const-variable=]
     139 | static const struct proc_ops acpi_system_wakeup_device_proc_ops = {
         |                              ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
--
>> net/sunrpc/cache.c:1636:30: warning: 'cache_flush_proc_ops' defined but not used [-Wunused-const-variable=]
    1636 | static const struct proc_ops cache_flush_proc_ops = {
         |                              ^~~~~~~~~~~~~~~~~~~~
>> net/sunrpc/cache.c:1598:30: warning: 'content_proc_ops' defined but not used [-Wunused-const-variable=]
    1598 | static const struct proc_ops content_proc_ops = {
         |                              ^~~~~~~~~~~~~~~~
>> net/sunrpc/cache.c:1574:30: warning: 'cache_channel_proc_ops' defined but not used [-Wunused-const-variable=]
    1574 | static const struct proc_ops cache_channel_proc_ops = {
         |                              ^~~~~~~~~~~~~~~~~~~~~~
--
>> fs/nfsd/nfsctl.c:160:30: warning: 'exports_proc_ops' defined but not used [-Wunused-const-variable=]
     160 | static const struct proc_ops exports_proc_ops = {
         |                              ^~~~~~~~~~~~~~~~
--
>> kernel/sched/psi.c:1272:30: warning: 'psi_cpu_proc_ops' defined but not used [-Wunused-const-variable=]
    1272 | static const struct proc_ops psi_cpu_proc_ops = {
         |                              ^~~~~~~~~~~~~~~~
>> kernel/sched/psi.c:1263:30: warning: 'psi_memory_proc_ops' defined but not used [-Wunused-const-variable=]
    1263 | static const struct proc_ops psi_memory_proc_ops = {
         |                              ^~~~~~~~~~~~~~~~~~~
>> kernel/sched/psi.c:1254:30: warning: 'psi_io_proc_ops' defined but not used [-Wunused-const-variable=]
    1254 | static const struct proc_ops psi_io_proc_ops = {
         |                              ^~~~~~~~~~~~~~~


vim +/acpi_system_wakeup_device_proc_ops +139 drivers/acpi/proc.c

   138	
 > 139	static const struct proc_ops acpi_system_wakeup_device_proc_ops = {
   140		.proc_open	= acpi_system_wakeup_device_open_fs,
   141		.proc_read	= seq_read,
   142		.proc_write	= acpi_system_write_wakeup_device,
   143		.proc_lseek	= seq_lseek,
   144		.proc_release	= single_release,
   145	};
   146	

-- 
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https://github.com/intel/lkp-tests/wiki