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Fri, 28 Nov 2025 03:34:09 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.7]) by mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id A7CDD19560B0; Fri, 28 Nov 2025 03:34:01 +0000 (UTC) From: Baoquan He To: linux-mm@kvack.org Cc: ryabinin.a.a@gmail.com, andreyknvl@gmail.com, glider@google.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, elver@google.com, sj@kernel.org, lorenzo.stoakes@oracle.com, snovitoll@gmail.com, christophe.leroy@csgroup.eu, Baoquan He , linux-arm-kernel@lists.infradead.org Subject: [PATCH v4 04/12] arch/arm: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:12 +0800 Message-ID: <20251128033320.1349620-5-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-Rspam-User: X-Rspamd-Server: rspam07 X-Rspamd-Queue-Id: E160020006 X-Stat-Signature: nq666u79pwe45fufpi7spp1qtw9jpo8x X-HE-Tag: 1764300855-27335 X-HE-Meta: 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 GkNEAF5Y B1np/MpL5tL7hY4EvTQrJO7aYewBQfLLY2T6tKw3B7cSHluAQ6jkeco+Gtvce2mUD0NGDsoFORJoDnatd1oqmEvE7ikSzgkT6LUE38tY/UVsCeLXRGwHEKc+MGRQa2EA+K3uxIsX4O5SYp2gSBn9G5VYtCkxxDP6qAnsj2Fko0sW+1SxOAZYhQwolTibSq4VL4Os2tl29QM+ZKE/RWa9yUL27qHgMMMK4NoY2bt1RIMKcK2SGzMFnCNACzTUiUVbwHIr7GvMvKhBCPnznVRIRqrLKDjChS9o1LLrdT/po4ytnbirzxBCsonbsxRTn0j9LBmX5lYpRbq05AWvTGxdOsG51KphprA+NTcsX5/bz6aOq1otHBaYpQ0Du3q89CULbZjtHgfRcFrqccU6mGsSvje+VzP11okAgqynPEq7piXaKNhYbu5gn5Ix8ox5wNYSa+wYRa9D4nQz3Lww= 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: Here call jump_label_init() early in setup_arch() so that later kasan_init() can enable static key kasan_flag_enabled. Put jump_label_init() beofre parse_early_param() as other architectures do. Signed-off-by: Baoquan He Cc: linux-arm-kernel@lists.infradead.org --- arch/arm/kernel/setup.c | 6 ++++++ arch/arm/mm/kasan_init.c | 2 ++ 2 files changed, 8 insertions(+) diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 0bfd66c7ada0..453a47a4c715 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -1135,6 +1135,12 @@ void __init setup_arch(char **cmdline_p) early_fixmap_init(); early_ioremap_init(); + /* + * Initialise the static keys early as they may be enabled by the + * kasan_init() or early parameters. + */ + jump_label_init(); + parse_early_param(); #ifdef CONFIG_MMU diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c index c6625e808bf8..488916c7d29e 100644 --- a/arch/arm/mm/kasan_init.c +++ b/arch/arm/mm/kasan_init.c @@ -212,6 +212,8 @@ void __init kasan_init(void) phys_addr_t pa_start, pa_end; u64 i; + if (kasan_arg_disabled) + return; /* * We are going to perform proper setup of shadow memory. * -- 2.41.0