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Wed, 25 Feb 2026 08:15:58 +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 D0B361800465; Wed, 25 Feb 2026 08:15:48 +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 08/15] arch/loongarch: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:05 +0800 Message-ID: <20260225081412.76502-9-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: -HcprtaPsIzh_hiGA4miKAdXAyX_Ynxvn0Vok1YB98s_1772007358 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: E3612180004 X-Stat-Signature: 3yucdfc13bx86sgm4wiurbep6ap3h7sb X-Rspam-User: X-HE-Tag: 1772007364-195921 X-HE-Meta: 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 7wDKY7Lo X35fzsu9TaLiUDmNrmKaZXWrEpw4AeWSfsj6oJR380HVHKqLiSnI/bFIt35v8NP0TO3x8/PMSsjVN3qNalUc/BnJHNAtIqPAO8VD+FY70oLxGzGkOKdmOu6CAZuMF0xetFAKX6vjPg75RrHy4yQx7No+a9f/qxzXx3/fcI9tClgEXAe2gNm1yC5KDi3o0IG2W8RjHPsHqNcsJX7aqhfYbhSWSKArcOQatFvhxBCz3NtwZCWhvorq4IVV2eo4AqHzGApkcybd2WChOKyEZd7kqTKoDbLwqWHIA9JiW6dQt8sFO7j1naEC4QZ65gtHjdC6/omdwI/1TxEw0wCuSU0S6hE1/2y6z2ndAvLv+uW0WUG/pE7fAtoTxobrC4BbOcMH2h0VGEHGILA2GefPba0chbh2Tyw== 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. Signed-off-by: Baoquan He Cc: loongarch@lists.linux.dev --- arch/loongarch/mm/kasan_init.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/loongarch/mm/kasan_init.c b/arch/loongarch/mm/kasan_init.c index 0fc02ca06457..047a059544e1 100644 --- a/arch/loongarch/mm/kasan_init.c +++ b/arch/loongarch/mm/kasan_init.c @@ -269,6 +269,9 @@ void __init kasan_init(void) u64 i; phys_addr_t pa_start, pa_end; + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; /* * If PGDIR_SIZE is too large for cpu_vabits, KASAN_SHADOW_END will * overflow UINTPTR_MAX and then looks like a user space address. -- 2.52.0