[bigeasy-staging:arm-locking-v2 2/4] qspinlock.c:undefined reference to `__bad_xchg'

[bigeasy-staging:arm-locking-v2 2/4] qspinlock.c:undefined reference to `__bad_xchg'

[kbuild test robot]

[-- Attachment #1: Type: text/plain, Size: 1174 bytes --]

Hi Sebastian,

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

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/bigeasy/staging.git arm-locking-v2
head:   c6339276cd4a34957bd9ba40e0a415c8755b54aa
commit: 023917282f7768aad073ac18c86e4f27dc614dba [2/4] ARM: Use qspinlock implementation
config: arm-omap2plus_defconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 7.4.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 023917282f7768aad073ac18c86e4f27dc614dba
        # save the attached .config to linux build tree
        GCC_VERSION=7.4.0 make.cross ARCH=arm 

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

All errors (new ones prefixed by >>):

   kernel/locking/qspinlock.o: In function `queued_spin_lock_slowpath':
>> qspinlock.c:(.text+0x214): undefined reference to `__bad_xchg'

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 36735 bytes --]