undefined reference to `__trace_hardirqs_on'

[kbuild test robot]

Hi Mike,

It's probably a bug fix that unveils the link errors.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   458ef2a25e0cbdc216012aa2b9cf549d64133b08
commit: 4f0bd808134d73184054ad09173821c84f31dd5d asm-generic/nds32: don't redefine cacheflush primitives
date:   3 months ago
config: nds32-randconfig-a001-20200331 (attached as .config)
compiler: nds32le-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 4f0bd808134d73184054ad09173821c84f31dd5d
        # save the attached .config to linux build tree
        GCC_VERSION=9.3.0 make.cross ARCH=nds32 

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

All errors (new ones prefixed by >>):

   nds32le-linux-ld: arch/nds32/kernel/ex-entry.o: in function `fucop_ctl_done':
   (.text+0x11e): undefined reference to `__trace_hardirqs_off'
   (.text+0x11e): relocation truncated to fit: R_NDS32_25_PCREL_RELA against undefined symbol `__trace_hardirqs_off'
   nds32le-linux-ld: arch/nds32/kernel/ex-exit.o: in function `no_work_pending':
   (.text+0xd6): undefined reference to `__trace_hardirqs_off'
   nds32le-linux-ld: (.text+0xda): undefined reference to `__trace_hardirqs_off'
   nds32le-linux-ld: nds32le-linux-ld: DWARF error: found dwarf version '22100', this reader only handles version 2, 3, 4 and 5 information
>> (.text+0xde): undefined reference to `__trace_hardirqs_on'
   nds32le-linux-ld: (.text+0xe2): undefined reference to `__trace_hardirqs_on'

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