Re: [PATCH v5] fork: free vmapped stacks in cache when cpus are offline

[kbuild test robot <lkp@intel.com>]

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Hi Hoeun,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.10-rc7 next-20170210]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/Hoeun-Ryu/fork-free-vmapped-stacks-in-cache-when-cpus-are-offline/20170211-183401
config: ia64-allmodconfig (attached as .config)
compiler: ia64-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=ia64 

All errors (new ones prefixed by >>):

   kernel/fork.c: In function 'fork_init':
>> kernel/fork.c:483:2: error: implicit declaration of function 'vm_stack_cache_init' [-Werror=implicit-function-declaration]
     vm_stack_cache_init();
     ^~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/vm_stack_cache_init +483 kernel/fork.c

   477			init_task.signal->rlim[RLIMIT_NPROC];
   478	
   479		for (i = 0; i < UCOUNT_COUNTS; i++) {
   480			init_user_ns.ucount_max[i] = max_threads/2;
   481		}
   482	
 > 483		vm_stack_cache_init();
   484	}
   485	
   486	int __weak arch_dup_task_struct(struct task_struct *dst,

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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