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From:   Alexander Potapenko <glider@google.com>
Date:   Wed, 11 Nov 2020 14:46:53 +0100
Message-ID: <CAG_fn=WsQmcmw2tEY5hdZuCXXWHDoFb05r0BAGZt8BxUM4U2gQ@mail.gmail.com>
Subject: Re: [PATCH v9 08/44] kasan: only build init.c for software modes
To:     Andrey Konovalov <andreyknvl@google.com>
Cc:     Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Vincenzo Frascino <vincenzo.frascino@arm.com>,
        Dmitry Vyukov <dvyukov@google.com>,
        Andrey Ryabinin <aryabinin@virtuozzo.com>,
        Marco Elver <elver@google.com>,
        Evgenii Stepanov <eugenis@google.com>,
        Branislav Rankov <Branislav.Rankov@arm.com>,
        Kevin Brodsky <kevin.brodsky@arm.com>,
        Andrew Morton <akpm@linux-foundation.org>,
        kasan-dev <kasan-dev@googlegroups.com>,
        Linux ARM <linux-arm-kernel@lists.infradead.org>,
        Linux Memory Management List <linux-mm@kvack.org>,
        LKML <linux-kernel@vger.kernel.org>
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On Tue, Nov 10, 2020 at 11:11 PM Andrey Konovalov <andreyknvl@google.com> w=
rote:
>
> This is a preparatory commit for the upcoming addition of a new hardware
> tag-based (MTE-based) KASAN mode.
>
> The new mode won't be using shadow memory, so only build init.c that
> contains shadow initialization code for software modes.
>
> No functional changes for software modes.
>
> Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
> Signed-off-by: Vincenzo Frascino <vincenzo.frascino@arm.com>
> Reviewed-by: Marco Elver <elver@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>

> ---
> Change-Id: I8d68c47345afc1dbedadde738f34a874dcae5080
> ---
>  mm/kasan/Makefile | 6 +++---
>  mm/kasan/init.c   | 2 +-
>  2 files changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/mm/kasan/Makefile b/mm/kasan/Makefile
> index 370d970e5ab5..7cf685bb51bd 100644
> --- a/mm/kasan/Makefile
> +++ b/mm/kasan/Makefile
> @@ -29,6 +29,6 @@ CFLAGS_report.o :=3D $(CC_FLAGS_KASAN_RUNTIME)
>  CFLAGS_tags.o :=3D $(CC_FLAGS_KASAN_RUNTIME)
>  CFLAGS_tags_report.o :=3D $(CC_FLAGS_KASAN_RUNTIME)
>
> -obj-$(CONFIG_KASAN) :=3D common.o init.o report.o
> -obj-$(CONFIG_KASAN_GENERIC) +=3D generic.o generic_report.o quarantine.o
> -obj-$(CONFIG_KASAN_SW_TAGS) +=3D tags.o tags_report.o
> +obj-$(CONFIG_KASAN) :=3D common.o report.o
> +obj-$(CONFIG_KASAN_GENERIC) +=3D init.o generic.o generic_report.o quara=
ntine.o
> +obj-$(CONFIG_KASAN_SW_TAGS) +=3D init.o tags.o tags_report.o
> diff --git a/mm/kasan/init.c b/mm/kasan/init.c
> index dfddd6c39fe6..1a71eaa8c5f9 100644
> --- a/mm/kasan/init.c
> +++ b/mm/kasan/init.c
> @@ -1,6 +1,6 @@
>  // SPDX-License-Identifier: GPL-2.0
>  /*
> - * This file contains some kasan initialization code.
> + * This file contains KASAN shadow initialization code.
>   *
>   * Copyright (c) 2015 Samsung Electronics Co., Ltd.
>   * Author: Andrey Ryabinin <ryabinin.a.a@gmail.com>
> --
> 2.29.2.222.g5d2a92d10f8-goog
>


--=20
Alexander Potapenko
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