Hi Yu,

[FYI, it's a private test report for your RFC patch.]
[auto build test ERROR on axboe-block/for-next]
[also build test ERROR on linus/master v6.2-rc1 next-20221226]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Yu-Kuai/block-bfq-switch-bfqg-ref-to-use-atomic-refcount-apis/20221227-105700
base:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git for-next
patch link:    https://lore.kernel.org/r/20221227031541.2595647-1-yukuai1%40huaweicloud.com
patch subject: [PATCH RFC] block, bfq: switch 'bfqg->ref' to use atomic refcount apis
config: x86_64-rhel-8.3-rust
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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/intel-lab-lkp/linux/commit/461f3c7be321385d0d8c9b3b33fa29bff8620281
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Yu-Kuai/block-bfq-switch-bfqg-ref-to-use-atomic-refcount-apis/20221227-105700
        git checkout 461f3c7be321385d0d8c9b3b33fa29bff8620281
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> block/bfq-cgroup.c:324:28: error: passing 'refcount_t' (aka 'struct refcount_struct') to parameter of incompatible type 'refcount_t *' (aka 'struct refcount_struct *'); take the address with &
           if (refcount_dec_and_test(bfqg->ref))
                                     ^~~~~~~~~
                                     &
   include/linux/refcount.h:331:67: note: passing argument to parameter 'r' here
   static inline __must_check bool refcount_dec_and_test(refcount_t *r)
                                                                     ^
   1 error generated.


vim +324 block/bfq-cgroup.c

   321	
   322	static void bfqg_put(struct bfq_group *bfqg)
   323	{
 > 324		if (refcount_dec_and_test(bfqg->ref))
   325			kfree(bfqg);
   326	}
   327	

-- 
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https://01.org/lkp