Hi Alexei,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   60c1f89241d49bacf71035470684a8d7b4bb46ea
commit: 819dd92b9c0bc7bce9097d8c1f14240f471bb386 bpfilter: switch to CC from HOSTCC
date:   3 months ago
config: alpha-allmodconfig (attached as .config)
compiler: alpha-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 819dd92b9c0bc7bce9097d8c1f14240f471bb386
        # save the attached .config to linux build tree
        GCC_VERSION=7.2.0 make.cross ARCH=alpha 
:::::: branch date: 27 hours ago
:::::: commit date: 3 months ago

All errors (new ones prefixed by >>):

   In file included from tools/include/uapi/asm/bitsperlong.h:17:0,
                    from /usr/alpha-linux-gnu/include/asm-generic/int-l64.h:11,
                    from /usr/alpha-linux-gnu/include/asm/types.h:12,
                    from tools/include/linux/types.h:10,
                    from ./include/uapi/linux/bpf.h:11,
                    from net/bpfilter/main.c:9:
>> tools/include/asm-generic/bitsperlong.h:14:2: error: #error Inconsistent word size. Check asm/bitsperlong.h
    #error Inconsistent word size. Check asm/bitsperlong.h
     ^~~~~

# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=819dd92b9c0bc7bce9097d8c1f14240f471bb386
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git remote update linus
git checkout 819dd92b9c0bc7bce9097d8c1f14240f471bb386
vim +14 tools/include/asm-generic/bitsperlong.h

bb970707 Arnaldo Carvalho de Melo 2016-07-12  12  
2a00f026 Arnaldo Carvalho de Melo 2016-07-13  13  #if BITS_PER_LONG != __BITS_PER_LONG
bb970707 Arnaldo Carvalho de Melo 2016-07-12 @14  #error Inconsistent word size. Check asm/bitsperlong.h
bb970707 Arnaldo Carvalho de Melo 2016-07-12  15  #endif
bb970707 Arnaldo Carvalho de Melo 2016-07-12  16  

:::::: The code at line 14 was first introduced by commit
:::::: bb9707077b4ee5f77bc9939b057ff8a0d410296f tools: Copy the bitsperlong.h files from the kernel

:::::: TO: Arnaldo Carvalho de Melo <acme@redhat.com>
:::::: CC: Arnaldo Carvalho de Melo <acme@redhat.com>

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