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Thu, 01 Oct 2020 10:58:46 -0700 (PDT) Date: Thu, 1 Oct 2020 19:58:41 +0200 From: elver@google.com To: Andrey Konovalov Cc: Dmitry Vyukov , Vincenzo Frascino , Catalin Marinas , kasan-dev@googlegroups.com, Andrey Ryabinin , Alexander Potapenko , Evgenii Stepanov , Elena Petrova , Branislav Rankov , Kevin Brodsky , Will Deacon , Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v3 32/39] kasan: define KASAN_GRANULE_SIZE for HW_TAGS Message-ID: <20201001175841.GS4162920@elver.google.com> References: <08b7f7fe6b20f6477fa2a447a931b3bbb1ad3121.1600987622.git.andreyknvl@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <08b7f7fe6b20f6477fa2a447a931b3bbb1ad3121.1600987622.git.andreyknvl@google.com> User-Agent: Mutt/1.14.5 (2020-06-23) X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Fri, Sep 25, 2020 at 12:50AM +0200, Andrey Konovalov wrote: > Hardware tag-based KASAN has granules of MTE_GRANULE_SIZE. Define > KASAN_GRANULE_SIZE to MTE_GRANULE_SIZE for CONFIG_KASAN_HW_TAGS. > > Signed-off-by: Andrey Konovalov > Signed-off-by: Vincenzo Frascino Reviewed-by: Marco Elver > --- > Change-Id: I5d1117e6a991cbca00d2cfb4ba66e8ae2d8f513a > --- > mm/kasan/kasan.h | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/mm/kasan/kasan.h b/mm/kasan/kasan.h > index 9c73f324e3ce..bd51ab72c002 100644 > --- a/mm/kasan/kasan.h > +++ b/mm/kasan/kasan.h > @@ -5,7 +5,13 @@ > #include > #include > > +#if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) > #define KASAN_GRANULE_SIZE (1UL << KASAN_SHADOW_SCALE_SHIFT) > +#else > +#include > +#define KASAN_GRANULE_SIZE (MTE_GRANULE_SIZE) Why braces? Shouldn't MTE_GRANULE_SIZE already have braces? > +#endif > + > #define KASAN_GRANULE_MASK (KASAN_GRANULE_SIZE - 1) > #define KASAN_GRANULE_PAGE (KASAN_GRANULE_SIZE << PAGE_SHIFT) > > -- > 2.28.0.681.g6f77f65b4e-goog >