Re: [PATCH] bfq: don't check active group if bfq.weight is not changed

[kernel test robot]

Hi Yu,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on block/for-next]
[also build test ERROR on v5.11-rc3 next-20210115]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Yu-Kuai/bfq-don-t-check-active-group-if-bfq-weight-is-not-changed/20210115-112031
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
config: arm-allyesconfig (attached as .config)
compiler: arm-linux-gnueabi-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://github.com/0day-ci/linux/commit/2a2ab6f73f0608cec85e1f15254edc78a75d0366
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Yu-Kuai/bfq-don-t-check-active-group-if-bfq-weight-is-not-changed/20210115-112031
        git checkout 2a2ab6f73f0608cec85e1f15254edc78a75d0366
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

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

All errors (new ones prefixed by >>):

   arm-linux-gnueabi-ld: block/bfq-cgroup.o: in function `bfq_pd_init':
>> bfq-cgroup.c:(.text+0x2f0): undefined reference to `__bad_cmpxchg'
   arm-linux-gnueabi-ld: block/bfq-cgroup.o: in function `bfq_io_set_weight_legacy':
   bfq-cgroup.c:(.text+0x448): undefined reference to `__bad_cmpxchg'
   arm-linux-gnueabi-ld: block/bfq-cgroup.o: in function `bfq_io_set_weight':
   bfq-cgroup.c:(.text+0x1390): undefined reference to `__bad_cmpxchg'

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

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