Hi,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.6-rc3 next-20200225]
[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/glider-google-com/stackdepot-check-depot_index-before-accessing-the-stack-slab/20200222-065605
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 0c0ddd6ae47c9238c18f475bcca675ca74c9dc31
config: nds32-randconfig-a001-20200225 (attached as .config)
compiler: nds32le-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=nds32 

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

All errors (new ones prefixed by >>):

   nds32le-linux-ld: lib/stackdepot.o: in function `filter_irq_stacks':
>> stackdepot.c:(.text+0xc6): undefined reference to `__softirqentry_text_start'
>> nds32le-linux-ld: stackdepot.c:(.text+0xca): undefined reference to `__softirqentry_text_start'
>> nds32le-linux-ld: stackdepot.c:(.text+0xce): undefined reference to `__softirqentry_text_end'
   nds32le-linux-ld: stackdepot.c:(.text+0xd2): undefined reference to `__softirqentry_text_end'

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