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(¤t->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(¤t->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(¤t->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