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Wed, 06 Aug 2025 11:24:45 -0700 (PDT) MIME-Version: 1.0 References: <20250805062333.121553-1-bhe@redhat.com> <20250805062333.121553-5-bhe@redhat.com> In-Reply-To: <20250805062333.121553-5-bhe@redhat.com> From: Sabyrzhan Tasbolatov Date: Wed, 6 Aug 2025 23:24:28 +0500 X-Gm-Features: Ac12FXwvECclFxV4j0m2efvjg_nqG0wG27nQYV0fVI0B5ZHzOZg6GczwOHM9vRs Message-ID: Subject: Re: [PATCH 4/4] mm/kasan: make kasan=on|off take effect for all three modes To: Baoquan He Cc: linux-mm@kvack.org, ryabinin.a.a@gmail.com, glider@google.com, andreyknvl@gmail.com, dvyukov@google.com, vincenzo.frascino@arm.com, akpm@linux-foundation.org, kasan-dev@googlegroups.com, linux-kernel@vger.kernel.org, kexec@lists.infradead.org Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Rspam-User: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 17AE2160010 X-Stat-Signature: w5hraa5adnii37768n5s3ja8d6gezaoq X-HE-Tag: 1754504687-948827 X-HE-Meta: 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 /BMwqDOS 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 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: List-Subscribe: List-Unsubscribe: On Tue, Aug 5, 2025 at 11:34=E2=80=AFAM Baoquan He wrote: > > Now everything is ready, set kasan=3Doff can disable kasan for all > three modes. > Hello, I've been working on this already and a different approach with the Kconfig ARCH_DEFER_KASAN has been proposed. Please see v4 thread. https://lore.kernel.org/all/20250805142622.560992-1-snovitoll@gmail.com/ It also covers the printing in a single KASAN codebase, instead of printing "KASAN intiilaized" in arch/* code. Also covers the enabling KASAN via kasan_enable() for all 3 modes. It's up to KASAN maintainers to choose either version. I just need the confirmation now if I should proceed with v5, or your version if it covers all arch and cases should be picked up. Thanks > Signed-off-by: Baoquan He > --- > include/linux/kasan-enabled.h | 11 +---------- > 1 file changed, 1 insertion(+), 10 deletions(-) > > diff --git a/include/linux/kasan-enabled.h b/include/linux/kasan-enabled.= h > index 32f2d19f599f..b5857e15ef14 100644 > --- a/include/linux/kasan-enabled.h > +++ b/include/linux/kasan-enabled.h > @@ -8,30 +8,21 @@ extern bool kasan_arg_disabled; > > DECLARE_STATIC_KEY_FALSE(kasan_flag_enabled); > > -#ifdef CONFIG_KASAN_HW_TAGS > - > static __always_inline bool kasan_enabled(void) > { > return static_branch_likely(&kasan_flag_enabled); > } > > +#ifdef CONFIG_KASAN_HW_TAGS > static inline bool kasan_hw_tags_enabled(void) > { > return kasan_enabled(); > } > - > #else /* CONFIG_KASAN_HW_TAGS */ > - > -static inline bool kasan_enabled(void) > -{ > - return IS_ENABLED(CONFIG_KASAN); > -} > - > static inline bool kasan_hw_tags_enabled(void) > { > return false; > } > - > #endif /* CONFIG_KASAN_HW_TAGS */ > > #endif /* LINUX_KASAN_ENABLED_H */ > -- > 2.41.0 > >