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Subject[ammarfaizi2-block:bpf/bpf-next/master 251/258] kernel/bpf/core.c:847:9: error: use of undeclared identifier 'PMD_SIZE'
tree:   https://github.com/ammarfaizi2/linux-block bpf/bpf-next/master
head: 7ada3787e91c89b0aa7abf47682e8e587b855c13
commit: ef078600eec20f20eb7833cf597d4a5edf2953c1 [251/258] bpf: Select proper size for bpf_prog_pack
config: arm-randconfig-c002-20220321 (https://download.01.org/0day-ci/archive/20220321/202203212309.ifp4edvz-lkp@intel.com/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 85e9b2687a13d1908aa86d1b89c5ce398a06cd39)
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/ammarfaizi2/linux-block/commit/ef078600eec20f20eb7833cf597d4a5edf2953c1
git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
git fetch --no-tags ammarfaizi2-block bpf/bpf-next/master
git checkout ef078600eec20f20eb7833cf597d4a5edf2953c1
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

>> kernel/bpf/core.c:847:9: error: use of undeclared identifier 'PMD_SIZE'
size = PMD_SIZE * num_online_nodes();
^
kernel/bpf/core.c:1629:12: warning: no previous prototype for function 'bpf_probe_read_kernel' [-Wmissing-prototypes]
u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
^
kernel/bpf/core.c:1629:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
u64 __weak bpf_probe_read_kernel(void *dst, u32 size, const void *unsafe_ptr)
^
static
1 warning and 1 error generated.


vim +/PMD_SIZE +847 kernel/bpf/core.c

841
842 static size_t select_bpf_prog_pack_size(void)
843 {
844 size_t size;
845 void *ptr;
846
> 847 size = PMD_SIZE * num_online_nodes();
848 ptr = module_alloc(size);
849
850 /* Test whether we can get huge pages. If not just use PAGE_SIZE
851 * packs.
852 */
853 if (!ptr || !is_vm_area_hugepages(ptr))
854 size = PAGE_SIZE;
855
856 vfree(ptr);
857 return size;
858 }
859

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

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