Re: [RFC PATCH bpf-next 1/3] bpf: Add support for qp-trie map

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

Hi Hou,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on bpf-next/master]

url:    https://github.com/intel-lab-lkp/linux/commits/Hou-Tao/Add-support-for-qp-trie-map/20220726-204347
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
config: i386-randconfig-a002 (https://download.01.org/0day-ci/archive/20220727/202207270430.yGvLY2tk-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 83882606dbd7ffb0bdd3460356202d97705809c8)
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/74890023aaa2d8ffed54d96d4999f10bf14ccfef
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Hou-Tao/Add-support-for-qp-trie-map/20220726-204347
        git checkout 74890023aaa2d8ffed54d96d4999f10bf14ccfef
        # 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=i386 SHELL=/bin/bash kernel/bpf/

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

All warnings (new ones prefixed by >>):

>> kernel/bpf/bpf_qp_trie.c:622:24: warning: bitwise or with non-zero value always evaluates to true [-Wtautological-bitwise-compare]
           if (!(attr->map_flags | BPF_F_NO_PREALLOC) ||
                 ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~
   1 warning generated.


vim +622 kernel/bpf/bpf_qp_trie.c

   616	
   617	static int qp_trie_alloc_check(union bpf_attr *attr)
   618	{
   619		if (!bpf_capable())
   620			return -EPERM;
   621	
 > 622		if (!(attr->map_flags | BPF_F_NO_PREALLOC) ||
   623		    attr->map_flags & ~QP_TRIE_CREATE_FLAG_MASK ||
   624		    !bpf_map_flags_access_ok(attr->map_flags))
   625			return -EINVAL;
   626	
   627		if (!attr->max_entries || attr->key_size < QP_TRIE_MIN_KEY_SIZE ||
   628		    !attr->value_size)
   629			return -EINVAL;
   630	
   631		if (attr->key_size > QP_TRIE_MAX_KEY_SIZE ||
   632		    !is_valid_k_v_size(attr->key_size, attr->value_size))
   633			return -E2BIG;
   634	
   635		return 0;
   636	}
   637	

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp