Hi "Christian,

I love your patch! Yet something to improve:

[auto build test ERROR on drm-tip/drm-tip]
[cannot apply to drm-intel/for-linux-next drm-exynos/exynos-drm-next 
tegra-drm/drm/tegra/for-next linus/master drm/drm-next v5.10 next-20201215]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    
https://github.com/0day-ci/linux/commits/Christian-K-nig/drm-ttm-rework-ttm_tt-page-limit-v2/20201216-221614
base:   git://anongit.freedesktop.org/drm/drm-tip drm-tip
config: i386-randconfig-c001-20201216 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-15) 9.3.0
reproduce (this is a W=1 build):
        # 
https://github.com/0day-ci/linux/commit/b613e371433208f88816be875b9d46b6d24cf830
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Christian-K-nig/drm-ttm-rework-ttm_tt-page-limit-v2/20201216-221614
        git checkout b613e371433208f88816be875b9d46b6d24cf830
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>

All errors (new ones prefixed by >>):

   ld: drivers/gpu/drm/ttm/ttm_bo.o: in function `ttm_bo_global_init':
>> drivers/gpu/drm/ttm/ttm_bo.c:1242: undefined reference to `__udivdi3'


vim +1242 drivers/gpu/drm/ttm/ttm_bo.c

  1223  
  1224  static int ttm_bo_global_init(void)
  1225  {
  1226          struct ttm_bo_global *glob = &ttm_bo_glob;
  1227          uint64_t num_pages;
  1228          struct sysinfo si;
  1229          int ret = 0;
  1230          unsigned i;
  1231  
  1232          mutex_lock(&ttm_global_mutex);
  1233          if (++ttm_bo_glob_use_count > 1)
  1234                  goto out;
  1235  
  1236          si_meminfo(&si);
  1237  
  1238          /* Limit the number of pages in the pool to about 50% of the 
total
  1239           * system memory.
  1240           */
  1241          num_pages = (u64)si.totalram * si.mem_unit;
> 1242          num_pages = (num_pages * 50 / 100) >> PAGE_SHIFT;
  1243  
  1244          ttm_pool_mgr_init(num_pages);
  1245          ttm_tt_mgr_init();
  1246  
  1247          spin_lock_init(&glob->lru_lock);
  1248          glob->dummy_read_page = alloc_page(__GFP_ZERO | GFP_DMA32);
  1249  
  1250          if (unlikely(glob->dummy_read_page == NULL)) {
  1251                  ret = -ENOMEM;
  1252                  goto out;
  1253          }
  1254  
  1255          for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i)
  1256                  INIT_LIST_HEAD(&glob->swap_lru[i]);
  1257          INIT_LIST_HEAD(&glob->device_list);
  1258          atomic_set(&glob->bo_count, 0);
  1259  
  1260          ret = kobject_init_and_add(
  1261                  &glob->kobj, &ttm_bo_glob_kobj_type, ttm_get_kobj(), 
"buffer_objects");
  1262          if (unlikely(ret != 0))
  1263                  kobject_put(&glob->kobj);
  1264  out:
  1265          mutex_unlock(&ttm_global_mutex);
  1266          return ret;
  1267  }
  1268  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org

Attachment: .config.gz
Description: application/gzip

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