[kbuild-all] [jgunthorpe:rdma_addr_space 206/208] drivers/infiniband/hw/mlx5/mr.c:628:6: warning: no previous prototype for function 'mlx5_mr_cache_free'

tree: https://github.com/jgunthorpe/linux rdma_addr_space head: 332a60a1fb7cbb5217d390271fc512441d6c30ab commit: f2276372b32b7497741ceb9814c4ac4fc55f79a1 [206/208] RDMA/mlx5: Consolidate MR destruction to mlx5_ib_dereg_mr() config: powerpc64-randconfig-r006-20210215 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://github.com/jgunthorpe/linux/commit/f2276372b32b7497741ceb9814c4ac... git remote add jgunthorpe https://github.com/jgunthorpe/linux git fetch --no-tags jgunthorpe rdma_addr_space git checkout f2276372b32b7497741ceb9814c4ac4fc55f79a1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): void mlx5_mr_cache_free(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr) ^ drivers/infiniband/hw/mlx5/mr.c:628:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void mlx5_mr_cache_free(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr) ^ static 1 warning generated. Kconfig warnings: (for reference only) WARNING: unmet direct dependencies detected for HOTPLUG_CPU Depends on SMP && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE Selected by - PM_SLEEP_SMP && SMP && (ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE && PM_SLEEP vim +/mlx5_mr_cache_free +628 drivers/infiniband/hw/mlx5/mr.c e126ba97dba9ed Eli Cohen 2013-07-07 627 49780d42dfc9ec Artemy Kovalyov 2017-01-18 @628 void mlx5_mr_cache_free(struct mlx5_ib_dev *dev, struct mlx5_ib_mr *mr) e126ba97dba9ed Eli Cohen 2013-07-07 629 { b91e1751fbcee7 Jason Gunthorpe 2020-03-10 630 struct mlx5_cache_ent *ent = mr->cache_ent; e126ba97dba9ed Eli Cohen 2013-07-07 631 746b5583c1a48a Eli Cohen 2013-10-23 632 spin_lock_irq(&ent->lock); e126ba97dba9ed Eli Cohen 2013-07-07 633 list_add_tail(&mr->list, &ent->head); 7c8691a396bd20 Jason Gunthorpe 2020-03-10 634 ent->available_mrs++; ad2d3ef46d2a88 Jason Gunthorpe 2020-03-10 635 queue_adjust_cache_locked(ent); 746b5583c1a48a Eli Cohen 2013-10-23 636 spin_unlock_irq(&ent->lock); e126ba97dba9ed Eli Cohen 2013-07-07 637 } e126ba97dba9ed Eli Cohen 2013-07-07 638 :::::: The code at line 628 was first introduced by commit :::::: 49780d42dfc9ec0f4090c32ca59688449da1a1cd IB/mlx5: Expose MR cache for mlx5_ib :::::: TO: Artemy Kovalyov <artemyko(a)mellanox.com&gt; :::::: CC: Doug Ledford <dledford(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org