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 D0554EFD208 for ; Wed, 25 Feb 2026 08:15:26 +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=krRB48lflglDsnK+MbRSOk31duSyM0PDe9SlLiivSrU=; b=4PRsJNq3uE/EIDxRHJ4vafGMj8 TJCLdSvn2cz3Zz6MoGzoXBkcS4nZYD5KUUnDVOMcgDOeZjD1PSYHvEoPCDH3Uc8yrYtoXJk5S/LPG V0iCEXINR2LOi2YW50T6/dJohikVQjvielnJ8PJ741PyyJDIQjTP60/K8c4ibGDF5hFsn4GkKMx4n 5qYL0DMQtKXZU36Vlg1djDsZ7nTtWcl2DXC3pZETngUNWWdNHi3BcmD+pHNn5lpyvIEtzUwgR7i6B BMHF6WUJXz/KFijQ5aC0QQ6Dmdae2FB5rsC2gXV+W3+3atf8NgrlFGA2EhcWVSwqn7iXs7wsbVUA+ idKcAkeA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vvA3K-00000003UZI-2Neg; Wed, 25 Feb 2026 08:15:26 +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 1vvA3H-00000003UWx-1NqQ for linux-um@lists.infradead.org; Wed, 25 Feb 2026 08:15:25 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007322; 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=krRB48lflglDsnK+MbRSOk31duSyM0PDe9SlLiivSrU=; b=PFTX5WsJ9Xfv+tMdpnQGuKWa4f75joUKbCZPfQ9A4YOqrJlJb8h4jysIqPePEJFxPJrU+/ Dylj/oYuDeyGsTw5jkrAvp5ODIbsKg3V0yMYa27wW9htJHk/Ie88aSBSEXorKagNd/hm4a SYt1s79fmQG37nFmn1CrYO1flWsxMvQ= Received: from mx-prod-mc-08.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-297-WO8-mb7BPemrfREQOcvRnw-1; Wed, 25 Feb 2026 03:15:11 -0500 X-MC-Unique: WO8-mb7BPemrfREQOcvRnw-1 X-Mimecast-MFC-AGG-ID: WO8-mb7BPemrfREQOcvRnw_1772007308 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-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 14EC918004AD; Wed, 25 Feb 2026 08:15:08 +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 860561800465; Wed, 25 Feb 2026 08:14:58 +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 03/15] mm/kasan: mm/kasan: move kasan= code to common place Date: Wed, 25 Feb 2026 16:14:00 +0800 Message-ID: <20260225081412.76502-4-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: 8o4U4qi6wka13QRA5BGKtCrgk9bGLqSI4E4iWEyR008_1772007308 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_001523_437111_EB9BCBB3 X-CRM114-Status: GOOD ( 11.45 ) X-BeenThere: linux-um@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-um" Errors-To: linux-um-bounces+linux-um=archiver.kernel.org@lists.infradead.org This allows generic and sw_tags to be set in kernel cmdline too. Signed-off-by: Baoquan He --- include/linux/kasan-enabled.h | 2 ++ mm/kasan/common.c | 21 +++++++++++++++++++++ mm/kasan/hw_tags.c | 18 ------------------ 3 files changed, 23 insertions(+), 18 deletions(-) diff --git a/include/linux/kasan-enabled.h b/include/linux/kasan-enabled.h index 9eca967d8526..b7cb906825ca 100644 --- a/include/linux/kasan-enabled.h +++ b/include/linux/kasan-enabled.h @@ -35,6 +35,8 @@ static inline void kasan_enable(void) {} #endif /* CONFIG_ARCH_DEFER_KASAN || CONFIG_KASAN_HW_TAGS */ #ifdef CONFIG_KASAN_HW_TAGS +extern bool kasan_arg_disabled; + static inline bool kasan_hw_tags_enabled(void) { return kasan_enabled(); diff --git a/mm/kasan/common.c b/mm/kasan/common.c index b7d05c2a6d93..0d788a468e96 100644 --- a/mm/kasan/common.c +++ b/mm/kasan/common.c @@ -42,6 +42,27 @@ DEFINE_STATIC_KEY_FALSE(kasan_flag_enabled); EXPORT_SYMBOL_GPL(kasan_flag_enabled); #endif +#ifdef CONFIG_KASAN_HW_TAGS +bool kasan_arg_disabled __ro_after_init; + +/* kasan=off/on */ +static int __init early_kasan_flag(char *arg) +{ + if (!arg) + return -EINVAL; + + if (!strcmp(arg, "off")) + kasan_arg_disabled = true; + else if (!strcmp(arg, "on")) + kasan_arg_disabled = false; + else + return -EINVAL; + + return 0; +} +early_param("kasan", early_kasan_flag); +#endif + struct slab *kasan_addr_to_slab(const void *addr) { if (virt_addr_valid(addr)) diff --git a/mm/kasan/hw_tags.c b/mm/kasan/hw_tags.c index 26a69f0d822c..9602ea4861e2 100644 --- a/mm/kasan/hw_tags.c +++ b/mm/kasan/hw_tags.c @@ -35,7 +35,6 @@ enum kasan_arg_vmalloc { KASAN_ARG_VMALLOC_ON, }; -bool kasan_arg_disabled __ro_after_init; static enum kasan_arg_mode kasan_arg_mode __ro_after_init; static enum kasan_arg_vmalloc kasan_arg_vmalloc __initdata; @@ -75,23 +74,6 @@ unsigned int kasan_page_alloc_sample_order = PAGE_ALLOC_SAMPLE_ORDER_DEFAULT; DEFINE_PER_CPU(long, kasan_page_alloc_skip); -/* kasan=off/on */ -static int __init early_kasan_flag(char *arg) -{ - if (!arg) - return -EINVAL; - - if (!strcmp(arg, "off")) - kasan_arg_disabled = true; - else if (!strcmp(arg, "on")) - kasan_arg_disabled = false; - else - return -EINVAL; - - return 0; -} -early_param("kasan", early_kasan_flag); - /* kasan.mode=sync/async/asymm */ static int __init early_kasan_mode(char *arg) { -- 2.52.0