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References: <cover.1515684162.git.andreyknvl@google.com> <ff221eca3db7a1f208c30c625b7d209fba33abb9.1515684162.git.andreyknvl@google.com>
 <c8f1d954-64fe-1e9c-d8ba-94e880de2501@virtuozzo.com>
From: Andrey Konovalov <andreyknvl@google.com>
Date: Fri, 12 Jan 2018 17:49:57 +0100
Message-ID: <CAAeHK+y=1YedHu=+1pjau=2cYh822vGuNLK_6Q4gYh9eGZBeMg@mail.gmail.com>
Subject: Re: [PATCH 2/2] kasan: clean up KASAN_SHADOW_SCALE_SHIFT usage
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Sender: owner-linux-mm@kvack.org
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To: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Alexander Potapenko <glider@google.com>, Dmitry Vyukov <dvyukov@google.com>, Catalin Marinas <catalin.marinas@arm.com>, Will Deacon <will.deacon@arm.com>, Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>, "H . Peter Anvin" <hpa@zytor.com>, kasan-dev <kasan-dev@googlegroups.com>, Linux Memory Management List <linux-mm@kvack.org>, linux-arm-kernel@lists.infradead.org, the arch/x86 maintainers <x86@kernel.org>, LKML <linux-kernel@vger.kernel.org>, Kostya Serebryany <kcc@google.com>

On Thu, Jan 11, 2018 at 10:59 PM, Andrey Ryabinin
<aryabinin@virtuozzo.com> wrote:
>
>
> On 01/11/2018 06:29 PM, Andrey Konovalov wrote:
>
>> diff --git a/arch/arm64/include/asm/kasan.h b/arch/arm64/include/asm/kasan.h
>> index e266f80e45b7..811643fe7640 100644
>> --- a/arch/arm64/include/asm/kasan.h
>> +++ b/arch/arm64/include/asm/kasan.h
>> @@ -27,7 +27,8 @@
>>   * should satisfy the following equation:
>>   *      KASAN_SHADOW_OFFSET = KASAN_SHADOW_END - (1ULL << 61)
>
> Care to update comments as well?

Sure, done in v2.

>
>>   */
>> -#define KASAN_SHADOW_OFFSET     (KASAN_SHADOW_END - (1ULL << (64 - 3)))
>> +#define KASAN_SHADOW_OFFSET     (KASAN_SHADOW_END - (1ULL << \
>> +                                     (64 - KASAN_SHADOW_SCALE_SHIFT)))
>>
>>  void kasan_init(void);
>>  void kasan_copy_shadow(pgd_t *pgdir);

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