linux-kernel - [ammarfaizi2-block:crng/random/jd/vmid-poll 61/61] drivers/char/random.c:1182:17: error: implicit declaration of function 'proc_sys_poll_notify'; did you mean 'proc_sys_poll

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Date:   Sat, 12 Mar 2022 10:48:52 +0800
From:   kernel test robot <lkp@...el.com>
To:     "Jason A. Donenfeld" <zx2c4@...nel.org>
Cc:     kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: [ammarfaizi2-block:crng/random/jd/vmid-poll 61/61]
 drivers/char/random.c:1182:17: error: implicit declaration of function
 'proc_sys_poll_notify'; did you mean 'proc_sys_poll_event'?

tree:   https://github.com/ammarfaizi2/linux-block crng/random/jd/vmid-poll
head:   28f8622d20d2c090711dbb8bee93bd00a8bc0cd6
commit: 28f8622d20d2c090711dbb8bee93bd00a8bc0cd6 [61/61] random: add vm_id sysctl for polling
config: ia64-randconfig-r016-20220310 (https://download.01.org/0day-ci/archive/20220312/202203121041.K4onshgj-lkp@intel.com/config)
compiler: ia64-linux-gcc (GCC) 11.2.0
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://github.com/ammarfaizi2/linux-block/commit/28f8622d20d2c090711dbb8bee93bd00a8bc0cd6
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block crng/random/jd/vmid-poll
        git checkout 28f8622d20d2c090711dbb8bee93bd00a8bc0cd6
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=ia64 SHELL=/bin/bash drivers/char/

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

All errors (new ones prefixed by >>):

   In file included from arch/ia64/include/asm/pgtable.h:153,
                    from include/linux/pgtable.h:6,
                    from arch/ia64/include/asm/uaccess.h:40,
                    from include/linux/uaccess.h:11,
                    from include/linux/sched/task.h:11,
                    from include/linux/sched/signal.h:9,
                    from include/linux/rcuwait.h:6,
                    from include/linux/percpu-rwsem.h:7,
                    from include/linux/fs.h:33,
                    from include/linux/poll.h:10,
                    from drivers/char/random.c:38:
   arch/ia64/include/asm/mmu_context.h: In function 'reload_context':
   arch/ia64/include/asm/mmu_context.h:127:48: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable]
     127 |         unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4;
         |                                                ^~~~~~~
   drivers/char/random.c: In function 'add_vmfork_randomness':
>> drivers/char/random.c:1182:17: error: implicit declaration of function 'proc_sys_poll_notify'; did you mean 'proc_sys_poll_event'? [-Werror=implicit-function-declaration]
    1182 |                 proc_sys_poll_notify(&sysctl_vmid_poll);
         |                 ^~~~~~~~~~~~~~~~~~~~
         |                 proc_sys_poll_event
   cc1: some warnings being treated as errors


vim +1182 drivers/char/random.c

  1167	
  1168	/*
  1169	 * Handle a new unique VM ID, which is unique, not secret, so we
  1170	 * don't credit it, but we do immediately force a reseed after so
  1171	 * that it's used by the crng posthaste.
  1172	 */
  1173	void add_vmfork_randomness(const void *unique_vm_id, size_t size)
  1174	{
  1175		add_device_randomness(unique_vm_id, size);
  1176		if (crng_ready()) {
  1177			crng_reseed(true);
  1178			pr_notice("crng reseeded due to virtual machine fork\n");
  1179		}
  1180		blocking_notifier_call_chain(&vmfork_chain, 0, NULL);
  1181		if (IS_ENABLED(CONFIG_SYSCTL))
> 1182			proc_sys_poll_notify(&sysctl_vmid_poll);
  1183	}
  1184	#if IS_MODULE(CONFIG_VMGENID)
  1185	EXPORT_SYMBOL_GPL(add_vmfork_randomness);
  1186	#endif
  1187	

---
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