Re: [PATCH for-next 2/2] RDMA/bnxt_re: Share a page to expose per CQ info with userspace

[kernel test robot <lkp@intel.com>]

Hi Selvin,

kernel test robot noticed the following build warnings:

[auto build test WARNING on rdma/for-next]
[also build test WARNING on next-20231213]
[cannot apply to linus/master v6.7-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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Selvin-Xavier/RDMA-bnxt_re-Add-UAPI-to-share-a-page-with-user-space/20231213-115222
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma.git for-next
patch link:    https://lore.kernel.org/r/1702438411-23530-3-git-send-email-selvin.xavier%40broadcom.com
patch subject: [PATCH for-next 2/2] RDMA/bnxt_re: Share a page to expose per CQ info with userspace
config: x86_64-allyesconfig (https://download.01.org/0day-ci/archive/20231214/202312140331.djKEJ9zR-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231214/202312140331.djKEJ9zR-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202312140331.djKEJ9zR-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> drivers/infiniband/hw/bnxt_re/ib_verbs.c:4236:20: warning: no previous prototype for function 'bnxt_re_search_for_cq' [-Wmissing-prototypes]
   struct bnxt_re_cq *bnxt_re_search_for_cq(struct bnxt_re_dev *rdev, u32 cq_id)
                      ^
   drivers/infiniband/hw/bnxt_re/ib_verbs.c:4236:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   struct bnxt_re_cq *bnxt_re_search_for_cq(struct bnxt_re_dev *rdev, u32 cq_id)
   ^
   static 
   drivers/infiniband/hw/bnxt_re/ib_verbs.c:4473:30: warning: variable 'cctx' set but not used [-Wunused-but-set-variable]
           struct bnxt_qplib_chip_ctx *cctx;
                                       ^
>> drivers/infiniband/hw/bnxt_re/ib_verbs.c:4510:7: warning: variable 'addr' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
           case BNXT_RE_SRQ_TOGGLE_MEM:
                ^~~~~~~~~~~~~~~~~~~~~~
   drivers/infiniband/hw/bnxt_re/ib_verbs.c:4517:42: note: uninitialized use occurs here
           entry = bnxt_re_mmap_entry_insert(uctx, addr, mmap_flag, &mem_offset);
                                                   ^~~~
   drivers/infiniband/hw/bnxt_re/ib_verbs.c:4481:10: note: initialize the variable 'addr' to silence this warning
           u64 addr;
                   ^
                    = 0
>> drivers/infiniband/hw/bnxt_re/ib_verbs.c:4510:7: warning: variable 'mmap_flag' is used uninitialized whenever switch case is taken [-Wsometimes-uninitialized]
           case BNXT_RE_SRQ_TOGGLE_MEM:
                ^~~~~~~~~~~~~~~~~~~~~~
   drivers/infiniband/hw/bnxt_re/ib_verbs.c:4517:48: note: uninitialized use occurs here
           entry = bnxt_re_mmap_entry_insert(uctx, addr, mmap_flag, &mem_offset);
                                                         ^~~~~~~~~
   drivers/infiniband/hw/bnxt_re/ib_verbs.c:4472:2: note: variable 'mmap_flag' is declared here
           enum bnxt_re_mmap_flag mmap_flag;
           ^
   4 warnings generated.


vim +/bnxt_re_search_for_cq +4236 drivers/infiniband/hw/bnxt_re/ib_verbs.c

  4235	
> 4236	struct bnxt_re_cq *bnxt_re_search_for_cq(struct bnxt_re_dev *rdev, u32 cq_id)
  4237	{
  4238		struct bnxt_re_cq *cq = NULL, *tmp_cq;
  4239	
  4240		hash_for_each_possible(rdev->cq_hash, tmp_cq, hash_entry, cq_id) {
  4241			if (tmp_cq->qplib_cq.id == cq_id) {
  4242				cq = tmp_cq;
  4243				break;
  4244			}
  4245		}
  4246		return cq;
  4247	}
  4248	

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