From nobody Tue Apr 7 07:08:24 2026 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 CE64A3101D0 for ; Wed, 25 Feb 2026 08:15:46 +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=1772007348; cv=none; b=MoYgBszhi2XHInMAABmn76bBcUh+rtMWytPwSV9QvWMGdr2XgCN14SVp0WikC1pVDO9dDRqdtLUcHUWhQWSAcKnmCy19kQmFIuhL0db1IGVl/7jVTS7tIqQpIrIGUL1oQuAC0o0JTxsdJnoiiAT9LpFbsS0ZU+64NCmB/Kh0pi0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007348; c=relaxed/simple; bh=v/LFI9p5qTGfe93md9EH3J7clj2J/XK4Ls1meB4wWyA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=Be93k9O44cEDTp9CJQyXBipazBXQn5dxBzYoUwsxE7oOHJ2eTG9RYlxyAkgR9qjMZP9K6U0WsavEgDCL86bvUOl9uPXg8jijnUJtxZom2YFvSA2u0EyXErLDe7kLK0oBNRQoET7bcjQaFvj1dfGIRDcIUIO/+0g4HkRZlYsdubg= 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=dPjEFtbM; 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="dPjEFtbM" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007346; 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=I228xoUl4+ZrgdKCBvI2rCmcNIzmRojWxOXL2gQGmtk=; b=dPjEFtbMFH80QRmjwJ4OG7ypPzz9ahq87xlEAp0FS3/kAVE2N7skc5ztNE+iRtVj8pSzzJ 1pXIs+2TiCZJBPwzzrY4zIq41kSQzkjGRvc9g/kmw3zjJmgGAcCkHwEM/1lOr7Q1LMFR4T MXhufBZN5VUesauFHo81XE9ghlfwcN0= Received: from mx-prod-mc-03.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-675-rwD-1e3zOqOiSldVPhFTdg-1; Wed, 25 Feb 2026 03:15:40 -0500 X-MC-Unique: rwD-1e3zOqOiSldVPhFTdg-1 X-Mimecast-MFC-AGG-ID: rwD-1e3zOqOiSldVPhFTdg_1772007338 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (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-03.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 01DB51956070; Wed, 25 Feb 2026 08:15:38 +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 68EB31800286; Wed, 25 Feb 2026 08:15:29 +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 06/15] arch/arm: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:03 +0800 Message-ID: <20260225081412.76502-7-bhe@redhat.com> In-Reply-To: <20260225081412.76502-1-bhe@redhat.com> References: <20260225081412.76502-1-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 3.4.1 on 10.30.177.111 Content-Type: text/plain; charset="utf-8" Here, kasan is disabled if specified 'kasan=3Doff' 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: linux-arm-kernel@lists.infradead.org --- arch/arm/kernel/setup.c | 6 ++++++ arch/arm/mm/kasan_init.c | 3 +++ 2 files changed, 9 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(); =20 + /* + * Initialise the static keys early as they may be enabled by the + * kasan_init() or early parameters. + */ + jump_label_init(); + parse_early_param(); =20 #ifdef CONFIG_MMU diff --git a/arch/arm/mm/kasan_init.c b/arch/arm/mm/kasan_init.c index c6625e808bf8..82ec043c891f 100644 --- a/arch/arm/mm/kasan_init.c +++ b/arch/arm/mm/kasan_init.c @@ -212,6 +212,9 @@ void __init kasan_init(void) phys_addr_t pa_start, pa_end; u64 i; =20 + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; /* * We are going to perform proper setup of shadow memory. * --=20 2.52.0