linux-kernel - Re: [PATCHv3 1/2] x86/vdso: add mremap hook to vm_special

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Date:	Fri, 15 Apr 2016 21:53:08 +0800
From:	kbuild test robot <lkp@...el.com>
To:	Dmitry Safonov <dsafonov@...tuozzo.com>
Cc:	kbuild-all@...org, linux-kernel@...r.kernel.org,
	luto@...capital.net, tglx@...utronix.de, mingo@...hat.com,
	hpa@...or.com, x86@...nel.org, akpm@...ux-foundation.org,
	linux-mm@...ck.org, 0x7f454c46@...il.com,
	Dmitry Safonov <dsafonov@...tuozzo.com>
Subject: Re: [PATCHv3 1/2] x86/vdso: add mremap hook to vm_special_mapping

Hi Dmitry,

[auto build test ERROR on v4.6-rc3]
[also build test ERROR on next-20160415]
[cannot apply to tip/x86/core tip/x86/vdso]
[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/Dmitry-Safonov/x86-vdso-add-mremap-hook-to-vm_special_mapping/20160415-212414
config: x86_64-randconfig-x011-201615 (attached as .config)
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/entry/vdso/vma.c: In function 'vdso_mremap':
>> arch/x86/entry/vdso/vma.c:113:29: error: 'vdso_image_32' undeclared (first use in this function)
      unsigned long vdso_land = vdso_image_32.sym_int80_landing_pad;
                                ^
   arch/x86/entry/vdso/vma.c:113:29: note: each undeclared identifier is reported only once for each function it appears in

vim +/vdso_image_32 +113 arch/x86/entry/vdso/vma.c

   107		const struct vdso_image *image = current->mm->context.vdso_image;
   108	
   109		if (image->size != new_size)
   110			return -EINVAL;
   111	
   112		if (is_ia32_task()) {
 > 113			unsigned long vdso_land = vdso_image_32.sym_int80_landing_pad;
   114			unsigned long old_land_addr = vdso_land +
   115				(unsigned long)current->mm->context.vdso;
   116	

---
0-DAY kernel test infrastructure                Open Source Technology Center
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Download attachment ".config.gz" of type "application/octet-stream" (32453 bytes)