[linux-next:master 5063/5087] kernel/user.c:141:28: error: 'struct user_struct' has no member named 'epoll_watches'

* [linux-next:master 5063/5087] kernel/user.c:141:28: error: 'struct user_struct' has no member named 'epoll_watches'
@ 2021-08-03 22:55 kernel test robot
  2021-08-04  0:06 ` Andrew Morton
  0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2021-08-03 22:55 UTC (permalink / raw)
  To: Nicholas Piggin
  Cc: kbuild-all, Linux Memory Management List, Mark Brown, Andrew Morton

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   c3f7b3be172b39d90b4c5cb87a2231cc6c2c8dcf
commit: e75b894778116889e88995d0e5029c2e9f6d847c [5063/5087] fs/epoll: use a per-cpu counter for user's watches count
config: ia64-randconfig-r015-20210803 (attached as .config)
compiler: ia64-linux-gcc (GCC) 10.3.0
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://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=e75b894778116889e88995d0e5029c2e9f6d847c
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout e75b894778116889e88995d0e5029c2e9f6d847c
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=ia64 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.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 arch/ia64/include/asm/sections.h:11,
                    from include/linux/interrupt.h:20,
                    from kernel/user.c:18:
   arch/ia64/include/asm/mmu_context.h: In function 'reload_context':
   arch/ia64/include/asm/mmu_context.h:127:41: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable]
     127 |  unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4;
         |                                         ^~~~~~~
   kernel/user.c: In function 'free_user':
>> kernel/user.c:141:28: error: 'struct user_struct' has no member named 'epoll_watches'
     141 |  percpu_counter_destroy(&up->epoll_watches);
         |                            ^~
   In file included from include/linux/sched/user.h:7,
                    from kernel/user.c:17:
   kernel/user.c: In function 'alloc_uid':
   kernel/user.c:189:31: error: 'struct user_struct' has no member named 'epoll_watches'
     189 |   if (percpu_counter_init(&new->epoll_watches, 0, GFP_KERNEL)) {
         |                               ^~
   include/linux/percpu_counter.h:38:25: note: in definition of macro 'percpu_counter_init'
      38 |   __percpu_counter_init(fbc, value, gfp, &__key);  \
         |                         ^~~
   kernel/user.c:203:31: error: 'struct user_struct' has no member named 'epoll_watches'
     203 |    percpu_counter_destroy(&new->epoll_watches);
         |                               ^~
   In file included from include/linux/sched/user.h:7,
                    from kernel/user.c:17:
   kernel/user.c: In function 'uid_cache_init':
   kernel/user.c:225:36: error: 'struct user_struct' has no member named 'epoll_watches'
     225 |  if (percpu_counter_init(&root_user.epoll_watches, 0, GFP_KERNEL))
         |                                    ^
   include/linux/percpu_counter.h:38:25: note: in definition of macro 'percpu_counter_init'
      38 |   __percpu_counter_init(fbc, value, gfp, &__key);  \
         |                         ^~~

vim +141 kernel/user.c

   131	
   132	/* IRQs are disabled and uidhash_lock is held upon function entry.
   133	 * IRQ state (as stored in flags) is restored and uidhash_lock released
   134	 * upon function exit.
   135	 */
   136	static void free_user(struct user_struct *up, unsigned long flags)
   137		__releases(&uidhash_lock)
   138	{
   139		uid_hash_remove(up);
   140		spin_unlock_irqrestore(&uidhash_lock, flags);
 > 141		percpu_counter_destroy(&up->epoll_watches);
   142		kmem_cache_free(uid_cachep, up);
   143	}
   144	

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

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