Re: [PATCH 10/18] vdso: make arch_setup_additional_pages wait for mmap_sem for write killable

From: kbuild test robot
Date: Mon Feb 29 2016 - 08:52:31 EST

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]

config: s390-allyesconfig (attached as .config)
wget -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=s390

All errors (new ones prefixed by >>):

arch/s390/kernel/vdso.c: In function 'arch_setup_additional_pages':
>> arch/s390/kernel/vdso.c:219:2: 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

vim +/down_write_killable +219 arch/s390/kernel/vdso.c

214 /*
215 * pick a base address for the vDSO in process space. We try to put
216 * it at vdso_base which is the "natural" base for it, but we might
217 * fail and end up putting it elsewhere.
218 */
> 219 if (down_write_killable(&mm->mmap_sem))
220 return -EINTR;
221 vdso_base = get_unmapped_area(NULL, 0, vdso_pages << PAGE_SHIFT, 0, 0);
222 if (IS_ERR_VALUE(vdso_base)) {

0-DAY kernel test infrastructure Open Source Technology Center Intel Corporation

Attachment: .config.gz
Description: Binary data