From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 9E005EFD20B for ; Wed, 25 Feb 2026 08:15:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=iXwY0Q2SJZmWL1WR2SYctHtbhbAGYnU1QS3gfwuZnJo=; b=g/AKpAls+aCAu2ZfkbvjUfLORv a42IlgJXVl/DpcWta3oOIki/BFznuPNf39giWtb/O+ukRupaHwtqDbGegfbCvWVyHKLBDTZXHgkdY kn5DHLVf+KSjoZNwhsn1Jvnk+OiOuNxUjwBf+5Yv0IASDgggu13InJyKkz60irap9YF1NN4dDj2UG q8+7aEXrnr2+7PDGZzsFblE6nD1yjzKYmUtCMRtp3klIrfv7Nn5QyDAuKriwZOu3Y4JN2XF17AmNT aEIgqvDny4gvPeS7v1VyXpxw7bB8T4t5/Eve6gSU4WPqa3gDUs8XOzxgvfdMFgoTCLx0Uw5eMLBIH +NQ6E/Fg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvA3a-00000003Upy-394Z; Wed, 25 Feb 2026 08:15:42 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvA3X-00000003Uly-27FY for linux-arm-kernel@lists.infradead.org; Wed, 25 Feb 2026 08:15:40 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007338; 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=iXwY0Q2SJZmWL1WR2SYctHtbhbAGYnU1QS3gfwuZnJo=; b=MLKA4wanB3tX242ihaZ0q0PbSnRNQAFNpoAx8qIXuS3HYDGC2F2cRk2u/iqsUIaiJcK5eq 7xzenVQsnds+21K+CjyL+cS+GT5296h1xFUYrJCAm03M7TJUg7Qx+GHqwqHRG/Fn20cETx gkFqRDpEGIItTJP4oD2E63672hwFakk= 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-338-W_q9ig0KNGOLXjAkoHCtsg-1; Wed, 25 Feb 2026 03:15:31 -0500 X-MC-Unique: W_q9ig0KNGOLXjAkoHCtsg-1 X-Mimecast-MFC-AGG-ID: W_q9ig0KNGOLXjAkoHCtsg_1772007329 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 989F01956068; Wed, 25 Feb 2026 08:15:28 +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 03B561800351; Wed, 25 Feb 2026 08:15:19 +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 05/15] mm/kasan/sw_tags: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:02 +0800 Message-ID: <20260225081412.76502-6-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: 8QPFYqZvAxbRrZT3NU8tQGpt_n9r3KiKXFQzTaNzrsI_1772007329 X-Mimecast-Originator: redhat.com Content-type: text/plain Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260225_001539_623746_43436CDF X-CRM114-Status: UNSURE ( 9.71 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Here, kasan is disabled if specified 'kasan=off' in kernel cmdline. Signed-off-by: Baoquan He --- mm/kasan/sw_tags.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/mm/kasan/sw_tags.c b/mm/kasan/sw_tags.c index 6c1caec4261a..7757b69b1c86 100644 --- a/mm/kasan/sw_tags.c +++ b/mm/kasan/sw_tags.c @@ -40,6 +40,10 @@ void __init kasan_init_sw_tags(void) { int cpu; + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + for_each_possible_cpu(cpu) per_cpu(prng_state, cpu) = (u32)get_cycles(); -- 2.52.0