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Fri, 18 Sep 2020 03:52:11 -0700 (PDT) Date: Fri, 18 Sep 2020 12:52:06 +0200 From: Marco Elver 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 v2 31/37] kasan, x86, s390: update undef CONFIG_KASAN Message-ID: <20200918105206.GB2384246@elver.google.com> References: <0a35b29d161bf2559d6e16fbd903e49351c7f6b8.1600204505.git.andreyknvl@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <0a35b29d161bf2559d6e16fbd903e49351c7f6b8.1600204505.git.andreyknvl@google.com> User-Agent: Mutt/1.14.4 (2020-06-18) 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 Tue, Sep 15, 2020 at 11:16PM +0200, Andrey Konovalov wrote: [...] > arch/s390/boot/string.c | 1 + > arch/x86/boot/compressed/misc.h | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/arch/s390/boot/string.c b/arch/s390/boot/string.c > index b11e8108773a..faccb33b462c 100644 > --- a/arch/s390/boot/string.c > +++ b/arch/s390/boot/string.c > @@ -3,6 +3,7 @@ > #include > #include > #undef CONFIG_KASAN > +#undef CONFIG_KASAN_GENERIC Is CONFIG_KASAN still used to guard instrumented versions of functions? It looks like #undef CONFIG_KASAN is no longer needed -- at least no longer mentions it. > #include "../lib/string.c" > > int strncmp(const char *cs, const char *ct, size_t count) > diff --git a/arch/x86/boot/compressed/misc.h b/arch/x86/boot/compressed/misc.h > index 726e264410ff..2ac973983a8e 100644 > --- a/arch/x86/boot/compressed/misc.h > +++ b/arch/x86/boot/compressed/misc.h > @@ -12,6 +12,7 @@ > #undef CONFIG_PARAVIRT_XXL > #undef CONFIG_PARAVIRT_SPINLOCKS > #undef CONFIG_KASAN > +#undef CONFIG_KASAN_GENERIC Similar here; although it seems a little harder to check if CONFIG_KASAN is still needed. (Maybe could check the preprocessed output diffs?) > > /* cpu_feature_enabled() cannot be used this early */ > #define USE_EARLY_PGTABLE_L5 > -- > 2.28.0.618.gf4bc123cb7-goog >