From nobody Tue Apr 7 07:05:53 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) (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 CC57429D288 for ; Wed, 25 Feb 2026 08:16:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.133.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007411; cv=none; b=KNfrNSe+aScRw1xTyQmAGfNvoHpjgGrUrtmBJvIp//L702hF0wEkmon+obGMXjiW014NlTMvoym1lqmy8BUVogSnYamBlRb8K4H12gVZEPA3J6UwJQ+15I83vbzp84QiaDt0o+n+A0OjCVfOJs6uKVb2CRnq4vTsqVkBXPfLUTA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772007411; c=relaxed/simple; bh=Q78Z41NRG95yPLpwoeP7egcT7NTlrm/dZYPW8uLJz98=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=szVsnjWgms2FvVD4MmOt1E65+lJnDJAhz3Wt3eMvEE+poJd0qeovznfCbFXFnf4ZapWcXEQwxInmTkvY73+lVrm/7Bp7lqRmslWXmvEdGdETrbWml8yvLx9xpAoeOiVREuUKeW/p2Us8P2+VolpLOdoAMWtr+fICRjIdScFA/ow= 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=CstRHfmz; arc=none smtp.client-ip=170.10.133.124 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="CstRHfmz" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772007409; 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=4hnbGAm/9+0AQuOsI/z6/MObWdWASDtilCdbwr5t2xI=; b=CstRHfmzJW0SAxDBPeC8ZrG0UQEVnejWHsT7+J6zBnovr3XL6d49DauJKhaz0IgqFNeuDJ DU9rwxvTwFZH6qTLcBApGqxhQlUbYi5dT8J1vLN5Nq3/ZuIj7q1SzYvHvSt3Fy4j65menh a22Uzgw9wwAS5YqRE6kpiUKCeFNa+vo= Received: from mx-prod-mc-01.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-354-kB3PHjUANFi-zOP_mIJF6w-1; Wed, 25 Feb 2026 03:16:43 -0500 X-MC-Unique: kB3PHjUANFi-zOP_mIJF6w-1 X-Mimecast-MFC-AGG-ID: kB3PHjUANFi-zOP_mIJF6w_1772007401 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-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A6D5A19560A7; Wed, 25 Feb 2026 08:16:41 +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 8570F1800465; Wed, 25 Feb 2026 08:16:32 +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 12/15] arch/xtensa: don't initialize kasan if it's disabled Date: Wed, 25 Feb 2026 16:14:09 +0800 Message-ID: <20260225081412.76502-13-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: Chris Zankel Cc: Max Filippov --- arch/xtensa/kernel/setup.c | 1 + arch/xtensa/mm/kasan_init.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c index f72e280363be..aabeb23f41fa 100644 --- a/arch/xtensa/kernel/setup.c +++ b/arch/xtensa/kernel/setup.c @@ -352,6 +352,7 @@ void __init setup_arch(char **cmdline_p) mem_reserve(__pa(_SecondaryResetVector_text_start), __pa(_SecondaryResetVector_text_end)); #endif + jump_label_init(); parse_early_param(); bootmem_init(); kasan_init(); diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c index 0524b9ed5e63..eb367b801218 100644 --- a/arch/xtensa/mm/kasan_init.c +++ b/arch/xtensa/mm/kasan_init.c @@ -70,6 +70,10 @@ void __init kasan_init(void) { int i; =20 + /* If KASAN is disabled via command line, don't initialize it. */ + if (kasan_arg_disabled) + return; + BUILD_BUG_ON(KASAN_SHADOW_OFFSET !=3D KASAN_SHADOW_START - (KASAN_START_VADDR >> KASAN_SHADOW_SCALE_SHIFT)); BUILD_BUG_ON(VMALLOC_START < KASAN_START_VADDR); --=20 2.52.0