Re: [PATCH 01/18] mm: Make mmap_sem for write waits killable for mm syscalls

[kbuild test robot <lkp@xxxxxxxxx>]

Hi Michal,

[auto build test ERROR on next-20160229]
[also build test ERROR on v4.5-rc6]
[cannot apply to drm/drm-next drm-intel/for-linux-next v4.5-rc6 v4.5-rc5 v4.5-rc4]
[if your patch is applied to the wrong git tree, please drop us a note to help improving the system]

url:    https://github.com/0day-ci/linux/commits/Michal-Hocko/change-mmap_sem-taken-for-write-killable/20160229-213258
config: i386-randconfig-x004-201609 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=i386 

All errors (new ones prefixed by >>):

   mm/util.c: In function 'vm_mmap_pgoff':
>> mm/util.c:331:8: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration]
       if (down_write_killable(&mm->mmap_sem))
           ^
   cc1: some warnings being treated as errors
--
   mm/mlock.c: In function 'do_mlock':
>> mm/mlock.c:638:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration]
     if (down_write_killable(&current->mm->mmap_sem))
         ^
   cc1: some warnings being treated as errors
--
   mm/mmap.c: In function 'SYSC_brk':
>> mm/mmap.c:185:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration]
     if (down_write_killable(&mm->mmap_sem))
         ^
   cc1: some warnings being treated as errors
--
   mm/mprotect.c: In function 'SYSC_mprotect':
>> mm/mprotect.c:381:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration]
     if (down_write_killable(&current->mm->mmap_sem))
         ^
   cc1: some warnings being treated as errors
--
   mm/mremap.c: In function 'SYSC_mremap':
>> mm/mremap.c:505:6: error: implicit declaration of function 'down_write_killable' [-Werror=implicit-function-declaration]
     if (down_write_killable(&current->mm->mmap_sem))
         ^
   cc1: some warnings being treated as errors

vim +/down_write_killable +331 mm/util.c

   325		struct mm_struct *mm = current->mm;
   326		unsigned long populate;
   327	
   328		ret = security_mmap_file(file, prot, flag);
   329		if (!ret) {
   330			if (killable) {
 > 331				if (down_write_killable(&mm->mmap_sem))
   332					return -EINTR;
   333			} else {
   334				down_write(&mm->mmap_sem);

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

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