Subject: Re: [PATCH bpf-next 1/3] xsk: Support UMEM chunk_size > PAGE_SIZE

From: kernel test robot <[email-masked]>
Date: Mon, 20 Mar 2023 08:58:51 +0800

Hi Kal,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on bpf/master]
[also build test ERROR on next-20230317]
[cannot apply to bpf-next/master linus/master v6.3-rc3]
[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/Kal-Conley/xsk-Support-UMEM-chunk_size-PAGE_SIZE/20230320-035849
base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git master
patch link:    https://lore.kernel.org/r/20230319195656.326701-2-kal.conley%40dectris.com
patch subject: [PATCH bpf-next 1/3] xsk: Support UMEM chunk_size > PAGE_SIZE
config: arm-mvebu_v5_defconfig (https://download.01.org/0day-ci/archive/20230320/[email-masked]/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project 67409911353323ca5edf2049ef0df54132fa1ca7)
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 arm cross compiling tool for clang build
        # apt-get install binutils-arm-linux-gnueabi
        # https://github.com/intel-lab-lkp/linux/commit/bbcc35c4ff807754bf61ef2c1f11195533e53de0
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Kal-Conley/xsk-Support-UMEM-chunk_size-PAGE_SIZE/20230320-035849
        git checkout bbcc35c4ff807754bf61ef2c1f11195533e53de0
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash net/core/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <[email-masked]>
| Link: https://lore.kernel.org/oe-kbuild-all/[email-masked]/

All errors (new ones prefixed by >>):

   In file included from net/core/xdp.c:22:
   In file included from include/net/xdp_sock_drv.h:10:
>> include/net/xsk_buff_pool.h:179:43: error: use of undeclared identifier 'HPAGE_SIZE'
           bool cross_pg = pool->hugetlb ? (addr & (HPAGE_SIZE - 1)) + len > HPAGE_SIZE :
                                                    ^
   include/net/xsk_buff_pool.h:179:68: error: use of undeclared identifier 'HPAGE_SIZE'
           bool cross_pg = pool->hugetlb ? (addr & (HPAGE_SIZE - 1)) + len > HPAGE_SIZE :
                                                                             ^
   2 errors generated.

vim +/HPAGE_SIZE +179 include/net/xsk_buff_pool.h

   175	
   176	static inline bool xp_desc_crosses_non_contig_pg(struct xsk_buff_pool *pool,
   177							 u64 addr, u32 len)
   178	{
 > 179		bool cross_pg = pool->hugetlb ? (addr & (HPAGE_SIZE - 1)) + len > HPAGE_SIZE :
   180						(addr & (PAGE_SIZE - 1)) + len > PAGE_SIZE;
   181	
   182		if (likely(!cross_pg))
   183			return false;
   184	
   185		if (pool->dma_pages_cnt) {
   186			return !(pool->dma_pages[addr >> PAGE_SHIFT] &
   187				 XSK_NEXT_PG_CONTIG_MASK);
   188		}
   189	
   190		/* skb path */
   191		return addr + len > pool->addrs_cnt;
   192	}
   193	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests