Hi Leon,

I love your patch! Perhaps something to improve:

[auto build test WARNING on rdma/for-next]
[also build test WARNING on next-20210607]
[cannot apply to v5.13-rc5]
[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/Leon-Romanovsky/Reorganize-sysfs-file-creation-for-struct-ib_devices/20210607-161959
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
config: x86_64-randconfig-b001-20210607 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project ae973380c5f6be77ce395022be40350942260be9)
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
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # https://github.com/0day-ci/linux/commit/1e8e4eebe16212ad4853b902eb8d045fce03f826
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Leon-Romanovsky/Reorganize-sysfs-file-creation-for-struct-ib_devices/20210607-161959
        git checkout 1e8e4eebe16212ad4853b902eb8d045fce03f826
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

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

All warnings (new ones prefixed by >>):

>> drivers/infiniband/hw/hfi1/sysfs.c:175:37: warning: unused variable 'port_cc_group' [-Wunused-const-variable]
   static const struct attribute_group port_cc_group = {
                                       ^
   1 warning generated.


vim +/port_cc_group +175 drivers/infiniband/hw/hfi1/sysfs.c

   174	
 > 175	static const struct attribute_group port_cc_group = {
   176		.name = "CCMgtA",
   177		.attrs = port_cc_attributes,
   178		.bin_attrs = port_cc_bin_attributes,
   179	};
   180	

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