Hi Randy,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   142b507f911c5a502dbb8f603216cb0ea8a79a48
commit: a730af6e3114d549555f4b130c216bad1c3aa80e um: Add 2 missing libs to fix various build errors
date:   4 weeks ago
config: um-randconfig-r033-20210510 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a730af6e3114d549555f4b130c216bad1c3aa80e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout a730af6e3114d549555f4b130c216bad1c3aa80e
        # save the attached .config to linux build tree
        make W=1 W=1 ARCH=um 

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

All errors (new ones prefixed by >>, old ones prefixed by <<):

ERROR: modpost: "X86_FEATURE_XMM2" [drivers/mtd/nand/raw/nand.ko] undefined!
ERROR: modpost: "X86_FEATURE_XMM" [drivers/misc/altera-stapl/altera-stapl.ko] undefined!
ERROR: modpost: "X86_FEATURE_XMM2" [drivers/misc/altera-stapl/altera-stapl.ko] undefined!
>> ERROR: modpost: "__divdi3" [fs/hostfs/hostfs.ko] undefined!

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for LOCKDEP
   Depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT && (FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
   Selected by
   - DEBUG_LOCK_ALLOC && DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT

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