Hi Jason, I love your patch! Yet something to improve: [auto build test ERROR on vhost/linux-next] [also build test ERROR on linux/master linus/master v5.6-rc6 next-20200317] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Jason-Wang/vDPA-support/20200318-191435 base: https://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost.git linux-next config: h8300-randconfig-a001-20200318 (attached as .config) compiler: h8300-linux-gcc (GCC) 9.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=9.2.0 make.cross ARCH=h8300 If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): h8300-linux-ld: drivers/vhost/vringh.o: in function `iotlb_translate': >> drivers/vhost/vringh.c:1079: undefined reference to `vhost_iotlb_itree_first' vim +1079 drivers/vhost/vringh.c 1061 1062 static int iotlb_translate(const struct vringh *vrh, 1063 u64 addr, u64 len, struct bio_vec iov[], 1064 int iov_size, u32 perm) 1065 { 1066 struct vhost_iotlb_map *map; 1067 struct vhost_iotlb *iotlb = vrh->iotlb; 1068 int ret = 0; 1069 u64 s = 0; 1070 1071 while (len > s) { 1072 u64 size, pa, pfn; 1073 1074 if (unlikely(ret >= iov_size)) { 1075 ret = -ENOBUFS; 1076 break; 1077 } 1078 > 1079 map = vhost_iotlb_itree_first(iotlb, addr, 1080 addr + len - 1); 1081 if (!map || map->start > addr) { 1082 ret = -EINVAL; 1083 break; 1084 } else if (!(map->perm & perm)) { 1085 ret = -EPERM; 1086 break; 1087 } 1088 1089 size = map->size - addr + map->start; 1090 pa = map->addr + addr - map->start; 1091 pfn = pa >> PAGE_SHIFT; 1092 iov[ret].bv_page = pfn_to_page(pfn); 1093 iov[ret].bv_len = min(len - s, size); 1094 iov[ret].bv_offset = pa & (PAGE_SIZE - 1); 1095 s += size; 1096 addr += size; 1097 ++ret; 1098 } 1099 1100 return ret; 1101 } 1102 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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