From nobody Mon Dec 1 22:04:01 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7D9B12D3A86 for ; Fri, 28 Nov 2025 03:34:25 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764300867; cv=none; b=iw+VmDo1vuro5kb55BqE0v0pOuBONAnbG8nvtE9iOcuOKLypUfqsz9ggHkFe5d4fOVrThwdPD0aQyv9etk5VhiAlClvGnTMQSqe6poogFYWWeJer0EFMp1bmehlMUx81NUjwgE7O/AjS/ZKLBcl+oYeMvKexJaPFiLhsZz1+0pA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764300867; c=relaxed/simple; bh=pkOwpmZJnPg6VhDhHNiE4Xh0POnqMbkgHvVtRFaun00=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=SebS7PFh0TzyBnF3xRl3ms3ASchPsxW7eUIdcM6ga0qg5RNO7jhof04RTkGA+2UBM3DBcRfXg8gRsGuRPZJG011aZjQHs2gpYQzsrydH0bMJjzHEoKS1creGeOoVF/dOD1Kum+XfU4orYJr2I/YegwUsZI8RuYEbAvGbjUlXAZc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=PG3wCDHb; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="PG3wCDHb" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1764300864; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=6bb3Fj+IEu5TgR6FamitgP4LC7HB+ODz43uA7YZcX7g=; b=PG3wCDHbi+Q2OrgbkbOc9DtfNrWBr4QW2gPmdPbn58AJeBlqSYQ9DZFX410jBaw0/eAQQh +7Boh4AeN6Dm68FBVUDbDc95wBxA7NriK7pB/+gozSVdlVO6wvGti81lifrgtv26bPj6CO K8uor3iRo7hHxfBrdmdwT9BUj7o7wNc= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-639-sr4zb15qN6-IOLblGY_jsQ-1; Thu, 27 Nov 2025 22:34:20 -0500 X-MC-Unique: sr4zb15qN6-IOLblGY_jsQ-1 X-Mimecast-MFC-AGG-ID: sr4zb15qN6-IOLblGY_jsQ_1764300858 Received: from mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-03.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.12]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id E2EA5180057A; Fri, 28 Nov 2025 03:34:17 +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 8142319560B0; Fri, 28 Nov 2025 03:34:10 +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 05/12] arch/arm64: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:13 +0800 Message-ID: <20251128033320.1349620-6-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-bhe@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 Content-Type: text/plain; charset="utf-8" And also need skip kasan_populate_early_vm_area_shadow() if kasan is disabled. Signed-off-by: Baoquan He Cc: linux-arm-kernel@lists.infradead.org --- arch/arm64/mm/kasan_init.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm64/mm/kasan_init.c b/arch/arm64/mm/kasan_init.c index abeb81bf6ebd..eb49fdad4ef1 100644 --- a/arch/arm64/mm/kasan_init.c +++ b/arch/arm64/mm/kasan_init.c @@ -384,6 +384,9 @@ void __init kasan_populate_early_vm_area_shadow(void *s= tart, unsigned long size) { unsigned long shadow_start, shadow_end; =20 + if (!kasan_enabled()) + return; + if (!is_vmalloc_or_module_addr(start)) return; =20 @@ -397,6 +400,9 @@ void __init kasan_populate_early_vm_area_shadow(void *s= tart, unsigned long size) =20 void __init kasan_init(void) { + if (kasan_arg_disabled) + return; + kasan_init_shadow(); kasan_init_depth(); kasan_init_generic(); --=20 2.41.0