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charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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, Nov 10, 2020 at 11:12 PM Andrey Konovalov w= rote: > > With the intoduction of hardware tag-based KASAN some kernel checks of > this kind: > > ifdef CONFIG_KASAN > > will be updated to: > > if defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KASAN_SW_TAGS) > > x86 and s390 use a trick to #undef CONFIG_KASAN for some of the code > that isn't linked with KASAN runtime and shouldn't have any KASAN > annotations. > > Also #undef CONFIG_KASAN_GENERIC with CONFIG_KASAN. > > Signed-off-by: Andrey Konovalov > Signed-off-by: Vincenzo Frascino > Reviewed-by: Marco Elver > Acked-by: Vasily Gorbik Reviewed-by: Alexander Potapenko > --- > Change-Id: I2a622db0cb86a8feb60c30d8cb09190075be2a90 > --- > 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 > #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/m= isc.h > index d9a631c5973c..901ea5ebec22 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 > > /* cpu_feature_enabled() cannot be used this early */ > #define USE_EARLY_PGTABLE_L5 > -- > 2.29.2.222.g5d2a92d10f8-goog > --=20 Alexander Potapenko Software Engineer Google Germany GmbH Erika-Mann-Stra=C3=9Fe, 33 80636 M=C3=BCnchen Gesch=C3=A4ftsf=C3=BChrer: Paul Manicle, Halimah DeLaine Prado Registergericht und -nummer: Hamburg, HRB 86891 Sitz der Gesellschaft: Hamburg