[Intel-gfx] [drm-intel:topic/drm-misc 38/38] drivers/gpu/drm/vgem/vgem_drv.c:249:9: error: implicit declaration of function 'drm_vma_offset_exact_lookup'

[kbuild test robot]

tree:   git://anongit.freedesktop.org/drm-intel topic/drm-misc
head:   0f3609e5b5c53ed52b8e82993cbda72806ef9c69
commit: 0f3609e5b5c53ed52b8e82993cbda72806ef9c69 [38/38] drm/gem: Use kref_get_unless_zero for the weak mmap references
config: i386-randconfig-s0-201541 (attached as .config)
reproduce:
        git checkout 0f3609e5b5c53ed52b8e82993cbda72806ef9c69
        # save the attached .config to linux build tree
        make ARCH=i386 

All error/warnings (new ones prefixed by >>):

   drivers/gpu/drm/vgem/vgem_drv.c: In function 'vgem_drm_gem_mmap':
>> drivers/gpu/drm/vgem/vgem_drv.c:249:9: error: implicit declaration of function 'drm_vma_offset_exact_lookup' [-Werror=implicit-function-declaration]
     node = drm_vma_offset_exact_lookup(dev->vma_offset_manager,
            ^
>> drivers/gpu/drm/vgem/vgem_drv.c:249:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
     node = drm_vma_offset_exact_lookup(dev->vma_offset_manager,
          ^
   cc1: some warnings being treated as errors

vim +/drm_vma_offset_exact_lookup +249 drivers/gpu/drm/vgem/vgem_drv.c

502e95c6 Zach Reizner 2015-03-04  243  	struct drm_gem_object *obj;
502e95c6 Zach Reizner 2015-03-04  244  	struct drm_vgem_gem_object *vgem_obj;
502e95c6 Zach Reizner 2015-03-04  245  	int ret = 0;
502e95c6 Zach Reizner 2015-03-04  246  
502e95c6 Zach Reizner 2015-03-04  247  	mutex_lock(&dev->struct_mutex);
502e95c6 Zach Reizner 2015-03-04  248  
502e95c6 Zach Reizner 2015-03-04 @249  	node = drm_vma_offset_exact_lookup(dev->vma_offset_manager,
502e95c6 Zach Reizner 2015-03-04  250  					   vma->vm_pgoff,
502e95c6 Zach Reizner 2015-03-04  251  					   vma_pages(vma));
502e95c6 Zach Reizner 2015-03-04  252  	if (!node) {

:::::: The code at line 249 was first introduced by commit
:::::: 502e95c6678505474f1056480310cd9382bacbac drm/vgem: implement virtual GEM

:::::: TO: Zach Reizner <zachr at google.com>
:::::: CC: Dave Airlie <airlied at redhat.com>

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