linux-kernel - mm/kasan/init.c:282:20: error: redefinition of 'kasan_populate_early_vm_area

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Date:   Mon, 11 Oct 2021 17:08:35 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        linux-mm <linux-mm@...ck.org>,
        kasan-dev <kasan-dev@...glegroups.com>
Cc:     Andrey Ryabinin <ryabinin.a.a@...il.com>,
        Alexander Potapenko <glider@...gle.com>,
        Andrey Konovalov <andreyknvl@...il.com>,
        Dmitry Vyukov <dvyukov@...gle.com>,
        Andrew Morton <akpm@...ux-foundatio.org>,
        Stephen Rothwell <sfr@...b.auug.org.au>
Subject: mm/kasan/init.c:282:20: error: redefinition of 'kasan_populate_early_vm_area_shadow'

Regression found on x86_64 gcc-11 built with KASAN enabled.
Following build warnings / errors reported on linux next 20211011.

metadata:
    git_describe: next-20211011
    git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
    git_short_log: d3134eb5de85 (\"Add linux-next specific files for 20211011\")
    target_arch: x86_64
    toolchain: gcc-11

build error :
--------------
mm/kasan/init.c:282:20: error: redefinition of
'kasan_populate_early_vm_area_shadow'
  282 | void __init __weak kasan_populate_early_vm_area_shadow(void *start,
      |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/mm.h:34,
                 from include/linux/memblock.h:13,
                 from mm/kasan/init.c:9:
include/linux/kasan.h:463:20: note: previous definition of
'kasan_populate_early_vm_area_shadow' with type 'void(void *, long
unsigned int)'
  463 | static inline void kasan_populate_early_vm_area_shadow(void *start,
      |                    ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[3]: *** [scripts/Makefile.build:288: mm/kasan/init.o] Error 1
make[3]: Target '__build' not remade because of errors.


Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

build link:
-----------
https://builds.tuxbuild.com/1zLv2snHfZN8QV01yA9MB8NhUZt/build.log

build config:
-------------
https://builds.tuxbuild.com/1zLv2snHfZN8QV01yA9MB8NhUZt/config

# To install tuxmake on your system globally
# sudo pip3 install -U tuxmake
tuxmake --runtime podman --target-arch x86_64 --toolchain gcc-11
--kconfig defconfig --kconfig-add
https://builds.tuxbuild.com/1zLv2snHfZN8QV01yA9MB8NhUZt/config

-- 
Linaro LKFT
https://lkft.linaro.org