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    SubjectRe: [PATCH -next 3/3] kasan: arm64: Fix pcpu_page_first_chunk crash with KASAN_VMALLOC
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    On 2021/7/5 22:10, kernel test robot wrote:
    > Hi Kefeng,
    >
    > Thank you for the patch! Yet something to improve:
    >
    > [auto build test ERROR on next-20210701]
    >
    > url: https://github.com/0day-ci/linux/commits/Kefeng-Wang/arm64-support-page-mapping-percpu-first-chunk-allocator/20210705-190907
    > base: fb0ca446157a86b75502c1636b0d81e642fe6bf1
    > config: i386-randconfig-a015-20210705 (attached as .config)
    > compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
    > reproduce (this is a W=1 build):
    > # https://github.com/0day-ci/linux/commit/5f6b5a402ed3e390563ddbddf12973470fd4886d
    > git remote add linux-review https://github.com/0day-ci/linux
    > git fetch --no-tags linux-review Kefeng-Wang/arm64-support-page-mapping-percpu-first-chunk-allocator/20210705-190907
    > git checkout 5f6b5a402ed3e390563ddbddf12973470fd4886d
    > # save the attached .config to linux build tree
    > make W=1 ARCH=i386
    >
    > 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 >>):
    >
    > mm/vmalloc.c: In function 'vm_area_register_early':
    >>> mm/vmalloc.c:2252:2: error: implicit declaration of function 'kasan_populate_early_vm_area_shadow' [-Werror=implicit-function-declaration]
    should add  a stub function when KASAN is not enabled, thanks.
    > 2252 | kasan_populate_early_vm_area_shadow(vm->addr, vm->size);
    > | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
    > cc1: some warnings being treated as errors
    >
    >
    > vim +/kasan_populate_early_vm_area_shadow +2252 mm/vmalloc.c
    >

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