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    Subject[tip:tmp.tmp2 181/364] arch/x86/include/asm/page_64_types.h:75:21: error: implicit declaration of function 'test_thread_flag'
    tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git tmp.tmp2
    head: adcceb5eb7aee38e4a9c15bdf599655f0e1b1324
    commit: ce4bb9d9b7175b1ac35cc13dd65b06aed1cb4fdd [181/364] sched/headers, x86/mm: Remove <linux/thread_info_api.h> from <asm/elf.h>
    config: x86_64-kexec (attached as .config)
    compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
    reproduce (this is a W=1 build):
    # https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=ce4bb9d9b7175b1ac35cc13dd65b06aed1cb4fdd
    git remote add tip https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git
    git fetch --no-tags tip tmp.tmp2
    git checkout ce4bb9d9b7175b1ac35cc13dd65b06aed1cb4fdd
    # save the attached .config to linux build tree
    make W=1 ARCH=x86_64

    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 >>):

    In file included from arch/x86/include/asm/page_types.h:46,
    from arch/x86/include/asm/page.h:9,
    from arch/x86/include/asm/spinlock.h:7,
    from include/linux/spinlock.h:91,
    from include/linux/mmzone.h:8,
    from include/linux/gfp.h:7,
    from include/linux/mm.h:12,
    from include/linux/mman.h:5,
    from lib/test_user_copy.c:13:
    lib/test_user_copy.c: In function 'test_user_copy_init':
    >> arch/x86/include/asm/page_64_types.h:75:21: error: implicit declaration of function 'test_thread_flag' [-Werror=implicit-function-declaration]
    75 | #define TASK_SIZE (test_thread_flag(TIF_ADDR32) ? \
    | ^~~~~~~~~~~~~~~~
    lib/test_user_copy.c:201:35: note: in expansion of macro 'TASK_SIZE'
    201 | if (user_addr >= (unsigned long)(TASK_SIZE)) {
    | ^~~~~~~~~
    cc1: some warnings being treated as errors


    vim +/test_thread_flag +75 arch/x86/include/asm/page_64_types.h

    999c83e8ffd90c Christoph Hellwig 2020-09-03 66
    999c83e8ffd90c Christoph Hellwig 2020-09-03 67 /* This decides where the kernel will search for a free chunk of vm
    999c83e8ffd90c Christoph Hellwig 2020-09-03 68 * space during mmap's.
    999c83e8ffd90c Christoph Hellwig 2020-09-03 69 */
    999c83e8ffd90c Christoph Hellwig 2020-09-03 70 #define IA32_PAGE_OFFSET ((current->personality & ADDR_LIMIT_3GB) ? \
    999c83e8ffd90c Christoph Hellwig 2020-09-03 71 0xc0000000 : 0xFFFFe000)
    999c83e8ffd90c Christoph Hellwig 2020-09-03 72
    999c83e8ffd90c Christoph Hellwig 2020-09-03 73 #define TASK_SIZE_LOW (test_thread_flag(TIF_ADDR32) ? \
    999c83e8ffd90c Christoph Hellwig 2020-09-03 74 IA32_PAGE_OFFSET : DEFAULT_MAP_WINDOW)
    999c83e8ffd90c Christoph Hellwig 2020-09-03 @75 #define TASK_SIZE (test_thread_flag(TIF_ADDR32) ? \
    999c83e8ffd90c Christoph Hellwig 2020-09-03 76 IA32_PAGE_OFFSET : TASK_SIZE_MAX)
    999c83e8ffd90c Christoph Hellwig 2020-09-03 77 #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_ADDR32)) ? \
    999c83e8ffd90c Christoph Hellwig 2020-09-03 78 IA32_PAGE_OFFSET : TASK_SIZE_MAX)
    999c83e8ffd90c Christoph Hellwig 2020-09-03 79

    :::::: The code at line 75 was first introduced by commit
    :::::: 999c83e8ffd90caa00ee6caf054e037cf8a27d0e x86: move PAGE_OFFSET, TASK_SIZE & friends to page_{32,64}_types.h

    :::::: TO: Christoph Hellwig <hch@lst.de>
    :::::: CC: Al Viro <viro@zeniv.linux.org.uk>

    ---
    0-DAY CI Kernel Test Service, Intel Corporation
    https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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