[luto:sched/lazymm 12/14] idle.c:undefined reference to `unlazy_mm_irqs_off'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git sched/lazymm
head:   755ebd64bdde9503ba31bdcda9bb7cc5fe8b73b4
commit: 9e9b27275e1ac4b57cafe05935f398d0c61b2080 [12/14] Rework "sched/core: Fix illegal RCU from offline CPUs"
config: mips-randconfig-r034-20210704 (attached as .config)
compiler: mipsel-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git/commit/?id=9e9b27275e1ac4b57cafe05935f398d0c61b2080
        git remote add luto https://git.kernel.org/pub/scm/linux/kernel/git/luto/linux.git
        git fetch --no-tags luto sched/lazymm
        git checkout 9e9b27275e1ac4b57cafe05935f398d0c61b2080
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross O=build_dir ARCH=mips SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   mipsel-linux-ld: kernel/sched/idle.o: in function `do_idle':
>> idle.c:(.text+0x310): undefined reference to `unlazy_mm_irqs_off'

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

Attachment: .config.gz
Description: application/gzip