[linux-next:master 1861/2527] /usr/bin/ld: kernel/rcu/tasks.h:1472:undefined reference to `cmpxchg_emu_u8'

[linux-next:master 1861/2527] /usr/bin/ld: kernel/rcu/tasks.h:1472:undefined reference to `cmpxchg_emu_u8'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   9d99040b1bc8dbf385a8aa535e9efcdf94466e19
commit: 8046f300501578d516391059d9ded85aa883487d [1861/2527] rcu-tasks: Remove open-coded one-byte cmpxchg() emulation
config: um-randconfig-r033-20230910 (https://download.01.org/0day-ci/archive/20240530/202405300206.tMqF4PfU-lkp@intel.com/config)
compiler: gcc-13 (Ubuntu 13.2.0-4ubuntu3) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240530/202405300206.tMqF4PfU-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202405300206.tMqF4PfU-lkp@intel.com/

All errors (new ones prefixed by >>):

   /usr/bin/ld: kernel/rcu/update.o: in function `rcu_trc_cmpxchg_need_qs':
   kernel/rcu/tasks.h:1472:(.text+0x1f67): undefined reference to `cmpxchg_emu_u8'
>> /usr/bin/ld: kernel/rcu/tasks.h:1472:(.text+0x1fdf): undefined reference to `cmpxchg_emu_u8'
   /usr/bin/ld: kernel/rcu/tasks.h:1472:(.text+0x4523): undefined reference to `cmpxchg_emu_u8'
   /usr/bin/ld: kernel/rcu/tasks.h:1472:(.text+0x4573): undefined reference to `cmpxchg_emu_u8'
   /usr/bin/ld: kernel/rcu/tasks.h:1472:(.text+0x49f3): undefined reference to `cmpxchg_emu_u8'
   /usr/bin/ld: kernel/rcu/update.o:kernel/rcu/tasks.h:1472: more undefined references to `cmpxchg_emu_u8' follow
   collect2: error: ld returned 1 exit status

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki