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 B3EBCD116F1 for ; Fri, 28 Nov 2025 03:34:16 +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=/phgffaeGBCaBWv4I/S2l048MgyIWecznBSacZiKmGw=; b=Tw6kbZwzNjqHlvIo8cVPeRp9WM OJOBuK641ysdlizLLRBIP6t6zyajh7EL6xbBtRrgqeXZP10TT+n48xWcxvQ9MV0Bv31BIraAb3GGD K8LAZA1qLLrhSZCZ/aJcYbicmkgnAvjpHzOWVwaJmseqAjPtA4yZSvhZ+bq9vOrBkAf+IcqicPr1Q gvuB+vOd4IWCk7+GgQBvPcLIduGwe/b8wgnYMCQOHGQzcvRSB/ZpsDBmb6E6ILjqmJRrtyyI4BtOb Cv0OxYswWFh0Q4Atzh3uma/kr2qtMbNGIeoirDWLSt/BJzAJw68xOcY0LakAvxJjE6QW/fBEvVpRL PwrTQV/g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vOpFN-0000000HWcC-3D2t; Fri, 28 Nov 2025 03:34:13 +0000 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vOpFK-0000000HWb6-1IYu for kexec@lists.infradead.org; Fri, 28 Nov 2025 03:34:11 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1764300849; 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=/phgffaeGBCaBWv4I/S2l048MgyIWecznBSacZiKmGw=; b=JuPD470Z7ghmsTiHYuaIqIqmCphI1Rd60cosz9BR7m6lS7iqqeOw/zUIyLQFBcbqNGdtqJ eds+zaCfiP6obCRm1VYFDda1Gp5aJtrSzlEwZF0Qkz545DukXmzSzR3VSNCvKvRQ8TtIRk xMAitnOBhMflk1jamXNQjTFS7sN6kjc= Received: from mx-prod-mc-05.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-591-g_ehcwKEPAiWXVHUWxLKOg-1; Thu, 27 Nov 2025 22:34:02 -0500 X-MC-Unique: g_ehcwKEPAiWXVHUWxLKOg-1 X-Mimecast-MFC-AGG-ID: g_ehcwKEPAiWXVHUWxLKOg_1764300840 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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id ABDB71956094; Fri, 28 Nov 2025 03:34:00 +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 3203D19560B0; Fri, 28 Nov 2025 03:33:52 +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 Subject: [PATCH v4 03/12] mm/kasan/sw_tags: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:11 +0800 Message-ID: <20251128033320.1349620-4-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-bhe@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.12 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251127_193410_412577_7E74D38E X-CRM114-Status: UNSURE ( 7.25 ) X-CRM114-Notice: Please train this message. X-BeenThere: kexec@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "kexec" Errors-To: kexec-bounces+kexec=archiver.kernel.org@lists.infradead.org Signed-off-by: Baoquan He --- mm/kasan/sw_tags.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/mm/kasan/sw_tags.c b/mm/kasan/sw_tags.c index 6c1caec4261a..58edb68efc09 100644 --- a/mm/kasan/sw_tags.c +++ b/mm/kasan/sw_tags.c @@ -40,6 +40,9 @@ void __init kasan_init_sw_tags(void) { int cpu; + if (kasan_arg_disabled) + return; + for_each_possible_cpu(cpu) per_cpu(prng_state, cpu) = (u32)get_cycles(); -- 2.41.0