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

From: kbuild test robot <lkp@intel.com>
To: Michal Hocko <mhocko@kernel.org>
Cc: kbuild-all@01.org, LKML <linux-kernel@vger.kernel.org>,
	"Andrew Morton" <akpm@linux-foundation.org>,
	linux-mm@kvack.org, "Alex Deucher" <alexander.deucher@amd.com>,
	"Alex Thorlton" <athorlton@sgi.com>,
	"Andrea Arcangeli" <aarcange@redhat.com>,
	"Andy Lutomirski" <luto@amacapital.net>,
	"Benjamin LaHaise" <bcrl@kvack.org>,
	"Christian König" <christian.koenig@amd.com>,
	"Daniel Vetter" <daniel.vetter@intel.com>,
	"Dave Hansen" <dave.hansen@linux.intel.com>,
	"David Airlie" <airlied@linux.ie>,
	"Davidlohr Bueso" <dave@stgolabs.net>,
	"David Rientjes" <rientjes@google.com>,
	"H . Peter Anvin" <hpa@zytor.com>,
	"Hugh Dickins" <hughd@google.com>,
	"Ingo Molnar" <mingo@kernel.org>,
	"Johannes Weiner" <hannes@cmpxchg.org>,
	"Kirill A . Shutemov" <kirill.shutemov@linux.intel.com>,
	"Konstantin Khlebnikov" <koct9i@gmail.com>,
	linux-arch@vger.kernel.org, "Mel Gorman" <mgorman@suse.de>,
	"Oleg Nesterov" <oleg@redhat.com>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"Petr Cermak" <petrcermak@chromium.org>,
	"Thomas Gleixner" <tglx@linutronix.de>,
	"Michal Hocko" <mhocko@suse.com>
Subject: Re: [PATCH 10/18] vdso: make arch_setup_additional_pages wait for mmap_sem for write killable
Date: Mon, 29 Feb 2016 21:50:53 +0800	[thread overview]
Message-ID: <201602292154.V74rAKTO%fengguang.wu@intel.com> (raw)
In-Reply-To: <1456752417-9626-11-git-send-email-mhocko@kernel.org>

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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: s390-allyesconfig (attached as .config)
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=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

   213	
   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
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