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Date: Mon, 11 Oct 2021 20:22:05 +0800 From: Kefeng Wang <wangkefeng.wang@...wei.com> To: <naresh.kamboju@...aro.org>, Andrew Morton <akpm@...ux-foundation.org> CC: <andreyknvl@...il.com>, <dvyukov@...gle.com>, <glider@...gle.com>, <kasan-dev@...glegroups.com>, <linux-kernel@...r.kernel.org>, <linux-mm@...ck.org>, <linux-next@...r.kernel.org>, <ryabinin.a.a@...il.com>, <sfr@...b.auug.org.au>, Linux Kernel Functional Testing <lkft@...aro.org>, Catalin Marinas <catalin.marinas@....com> Subject: Re: [PATCH] mm: kasan: Fix redefinition of 'kasan_populate_early_vm_area_shadow' On 2021/10/11 20:32, Kefeng Wang wrote: > Move kasan_populate_early_vm_area_shadow() from mm/kasan/init.c to > mm/kasan/shadow.c, make it under CONFIG_KASAN_VMALLOC to fix the > redefinition issue. > > Reported-by: Linux Kernel Functional Testing <lkft@...aro.org> > Cc: Andrey Ryabinin <ryabinin.a.a@...il.com> > Cc: Catalin Marinas <catalin.marinas@....com> > Cc: Dmitry Vyukov <dvyukov@...gle.com> > Cc: kasan-dev@...glegroups.com > Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com> > --- > Hi Andrew, > Could you help to merge this into previos patch > "kasan: arm64: fix pcpu_page_first_chunk crash with KASAN_VMALLOC", > sorry for the build error. Correct Andrew's mail. > > mm/kasan/init.c | 5 ----- > mm/kasan/shadow.c | 5 +++++ > 2 files changed, 5 insertions(+), 5 deletions(-) > > diff --git a/mm/kasan/init.c b/mm/kasan/init.c > index d39577d088a1..cc64ed6858c6 100644 > --- a/mm/kasan/init.c > +++ b/mm/kasan/init.c > @@ -279,11 +279,6 @@ int __ref kasan_populate_early_shadow(const void *shadow_start, > return 0; > } > > -void __init __weak kasan_populate_early_vm_area_shadow(void *start, > - unsigned long size) > -{ > -} > - > static void kasan_free_pte(pte_t *pte_start, pmd_t *pmd) > { > pte_t *pte; > diff --git a/mm/kasan/shadow.c b/mm/kasan/shadow.c > index 8d95ee52d019..4a4929b29a23 100644 > --- a/mm/kasan/shadow.c > +++ b/mm/kasan/shadow.c > @@ -254,6 +254,11 @@ core_initcall(kasan_memhotplug_init); > > #ifdef CONFIG_KASAN_VMALLOC > > +void __init __weak kasan_populate_early_vm_area_shadow(void *start, > + unsigned long size) > +{ > +} > + > static int kasan_populate_vmalloc_pte(pte_t *ptep, unsigned long addr, > void *unused) > { >
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