[kbuild-all] [hch-misc:alloc_vm_area 4/7] i915_gem_pages.c:undefined reference to `vmap_pfn'

tree: git://git.infradead.org/users/hch/misc.git alloc_vm_area head: d574728eedb41cee38600f7f2199852e9018a50a commit: 22728ce0908b9495312398ae96bf901e6b31f664 [4/7] drm/i915: use vmap in i915_gem_object_map config: i386-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): git checkout 22728ce0908b9495312398ae96bf901e6b31f664 # 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 <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: drivers/gpu/drm/i915/gem/i915_gem_pages.o: in function `i915_gem_object_map_nopage': --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org