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Wed, 25 Feb 2026 08:16:41 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (unknown [10.72.112.55]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 8570F1800465; Wed, 25 Feb 2026 08:16:32 +0000 (UTC) From: Baoquan He To: kasan-dev@googlegroups.com Cc: linux-mm@kvack.org, andreyknvl@gmail.com, ryabinin.a.a@gmail.com, glider@google.com, dvyukov@google.com, linux-kernel@vger.kernel.org, linux-um@lists.infradead.org, linux-arm-kernel@lists.infradead.org, loongarch@lists.linux.dev, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, x86@kernel.org, chris@zankel.net, jcmvbkbc@gmail.com, linux-s390@vger.kernel.org, hca@linux.ibm.com, Baoquan He Subject: [PATCH v5 12/15] arch/xtensa: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:09 +0800 Message-ID: <20260225081412.76502-13-bhe@redhat.com> In-Reply-To: <20260225081412.76502-1-bhe@redhat.com> References: <20260225081412.76502-1-bhe@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 X-Mimecast-MFC-PROC-ID: eCMifHe9XPw-rZ3kmg_Xdt_IFeVJDAbURv1t6qdS5rg_1772007401 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam05 X-Rspam-User: X-Rspamd-Queue-Id: C25A71C0011 X-Stat-Signature: rr31i6p7u4j4fmxamzj87d6i9q4x55fk X-HE-Tag: 1772007409-484913 X-HE-Meta: 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 F5y/zQyM kEiTHdFXmTQteAf/EZR+qU54N1rUwJFDWECZglXunT4Itf0Ou9oXjPCJvokzPGjyR5v5fl8jCKWWq6MyM9tXJ5jJcKHvd79HIqHH9Dh8tAc6amWr5S8t/8S1iiUsu1tvwBILM Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Here, kasan is disabled if specified 'kasan=off' in kernel cmdline. And also 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: Chris Zankel Cc: Max Filippov --- arch/xtensa/kernel/setup.c | 1 + arch/xtensa/mm/kasan_init.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index f72e280363be..aabeb23f41fa 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -352,6 +352,7 @@ void __init setup_arch(char **cmdline_p) mem_reserve(__pa(_SecondaryResetVector_text_start), __pa(_SecondaryResetVector_text_end)); #endif + jump_label_init(); parse_early_param(); bootmem_init(); kasan_init(); diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c index 0524b9ed5e63..eb367b801218 100644 --- a/arch/xtensa/mm/kasan_init.c +++ b/arch/xtensa/mm/kasan_init.c @@ -70,6 +70,10 @@ void __init kasan_init(void) { int i; + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + BUILD_BUG_ON(KASAN_SHADOW_OFFSET != KASAN_SHADOW_START - (KASAN_START_VADDR >> KASAN_SHADOW_SCALE_SHIFT)); BUILD_BUG_ON(VMALLOC_START < KASAN_START_VADDR); -- 2.52.0