From nobody Mon Dec 1 22:04:02 2025 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 1C6BB2D4805 for ; Fri, 28 Nov 2025 03:34:58 +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=1764300900; cv=none; b=XcZ+HjeYQOVzarfbacUrYbmSFzZxOxQX+QIrxkRiCF1yc/uDHU0SAS1z6YiEqosKcvk0AUQt3Y9Bq8SD1XaMBynDgA7u8s7nTAEjmsBMOWdA+7AczzLGYSq9N64IDLAXXp/DeEO0t3RNzHr5+nQblusTCcsmy8Al+Y4WF2qkrqg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1764300900; c=relaxed/simple; bh=RJByBMV8qhktcyZ/P8UdtTDVYurq+L/RPLFZ67q6HSE=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-type; b=sC5/XhP5oPvNaEFCUqYsHngDaMwB3d8bmdF5CMsx/XWwbrxGMt06vmToffYaGLfEvahHkB2gYjoGAufpe97ed+hOHvVTlzEwziGjOD0s/hCTF2kgR1RJ4rxdKU2dwVIEZ2Qzxavd5hUpy9DMZOXIJxjO6RXadDGuRKhW1PxvIpo= 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=IOBh9EPI; 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="IOBh9EPI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1764300898; 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=K3b4hcMhxxjCn2BaG6Ly1WYT5S5cKb/IEvtIbpVbOV0=; b=IOBh9EPI0fyBMdw9jULXDvUTZsqLyIMxiWIbz/wHmA6J6R1g+hnzLLJpwnybAva4vGP8gC Kx2NCyBN65HR1klTWfieEPdGHiqWzO+iuLU2TmGcl/11L9Pb35fBH24zHeDEo6zg2Kjbc1 kFPLtzgQXjr4Lwh5dVTW0Z5XXZWMQ9A= Received: from mx-prod-mc-06.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-509-Z-W1bC2_OWGpYgZiaAnmrw-1; Thu, 27 Nov 2025 22:34:53 -0500 X-MC-Unique: Z-W1bC2_OWGpYgZiaAnmrw-1 X-Mimecast-MFC-AGG-ID: Z-W1bC2_OWGpYgZiaAnmrw_1764300891 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-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 0441B180057A; Fri, 28 Nov 2025 03:34:51 +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 AE04C19560B6; Fri, 28 Nov 2025 03:34:43 +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 , x86@kernel.org Subject: [PATCH v4 09/12] arch/x86: don't initialize kasan if it's disabled Date: Fri, 28 Nov 2025 11:33:17 +0800 Message-ID: <20251128033320.1349620-10-bhe@redhat.com> In-Reply-To: <20251128033320.1349620-1-bhe@redhat.com> References: <20251128033320.1349620-1-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 3.0 on 10.30.177.12 Content-Type: text/plain; charset="utf-8" Signed-off-by: Baoquan He Cc: x86@kernel.org --- arch/x86/mm/kasan_init_64.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/x86/mm/kasan_init_64.c b/arch/x86/mm/kasan_init_64.c index 998b6010d6d3..d642ad364904 100644 --- a/arch/x86/mm/kasan_init_64.c +++ b/arch/x86/mm/kasan_init_64.c @@ -343,6 +343,9 @@ void __init kasan_init(void) unsigned long shadow_cea_begin, shadow_cea_per_cpu_begin, shadow_cea_end; int i; =20 + if (kasan_arg_disabled) + return; + memcpy(early_top_pgt, init_top_pgt, sizeof(early_top_pgt)); =20 /* --=20 2.41.0