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 X-Spam-Level: X-Spam-Status: No, score=-9.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A9FD2C2BA80 for ; Wed, 8 Apr 2020 12:00:06 +0000 (UTC) Received: from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 7099920747 for ; Wed, 8 Apr 2020 12:00:06 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="AW8pgI8M" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7099920747 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by fraxinus.osuosl.org (Postfix) with ESMTP id 3F69E86A4A; Wed, 8 Apr 2020 12:00:06 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from fraxinus.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id GkHUWugGqeRi; Wed, 8 Apr 2020 12:00:05 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by fraxinus.osuosl.org (Postfix) with ESMTP id 7E58986A3C; Wed, 8 Apr 2020 12:00:04 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 68495C1D89; Wed, 8 Apr 2020 12:00:04 +0000 (UTC) Received: from silver.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id 06C16C0177 for ; Wed, 8 Apr 2020 12:00:03 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by silver.osuosl.org (Postfix) with ESMTP id CE014203FC for ; Wed, 8 Apr 2020 12:00:02 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from silver.osuosl.org ([127.0.0.1]) by localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id FSQo5foCbxFm for ; Wed, 8 Apr 2020 12:00:01 +0000 (UTC) X-Greylist: from auto-whitelisted by SQLgrey-1.7.6 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) by silver.osuosl.org (Postfix) with ESMTPS id 9907D20361 for ; Wed, 8 Apr 2020 12:00:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20170209; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=PAMsYd2akdNcv/61LqzK42KESSh1nYBdbqHeKhdDNg0=; b=AW8pgI8MPKkROoB8H45BAd8bqD YkGIDJuOmcFj1oi9Sbtk8Zx0z4VdemtQofwcOkWOUbPK7k+JA/rKZETRedymoO8+URo3yaJNhj6r0 eD7mbR6lp0GLewQNQfA+FZ4fn5BoO5NBc01lvGRob1ZsACPrZofYyqa33qUOM0XEx+UvHsOkOhOHC oso8J18tJIyNrQNeRtUYklbHL1gG8TjoWe8hVLHTwfZyxDD00nYUDBwXE4xdjqOCiTIc17D9l1YQC xre4RGdbiu32Rv83O8hd5jAzbY+Abw20UrkBSoj2K2jRt2b1hC8yoRTWLwJCC3Njn9FbbYzo1NnJF gQdf9pjA==; Received: from [2001:4bb8:180:5765:65b6:f11e:f109:b151] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1jM9Ml-0001bC-Nz; Wed, 08 Apr 2020 11:59:36 +0000 From: Christoph Hellwig To: Andrew Morton , "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , x86@kernel.org, David Airlie , Daniel Vetter , Laura Abbott , Sumit Semwal , Sakari Ailus , Minchan Kim , Nitin Gupta Subject: [PATCH 02/28] staging: android: ion: use vmap instead of vm_map_ram Date: Wed, 8 Apr 2020 13:59:00 +0200 Message-Id: <20200408115926.1467567-3-hch@lst.de> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200408115926.1467567-1-hch@lst.de> References: <20200408115926.1467567-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Cc: Christophe Leroy , linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-s390@vger.kernel.org, Peter Zijlstra , linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, bpf@vger.kernel.org, Robin Murphy , linux-arm-kernel@lists.infradead.org X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" vm_map_ram can keep mappings around after the vm_unmap_ram. Using that with non-PAGE_KERNEL mappings can lead to all kinds of aliasing issues. Signed-off-by: Christoph Hellwig --- drivers/staging/android/ion/ion_heap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/staging/android/ion/ion_heap.c b/drivers/staging/android/ion/ion_heap.c index 473b465724f1..a2d5c6df4b96 100644 --- a/drivers/staging/android/ion/ion_heap.c +++ b/drivers/staging/android/ion/ion_heap.c @@ -99,12 +99,12 @@ int ion_heap_map_user(struct ion_heap *heap, struct ion_buffer *buffer, static int ion_heap_clear_pages(struct page **pages, int num, pgprot_t pgprot) { - void *addr = vm_map_ram(pages, num, -1, pgprot); + void *addr = vmap(pages, num, VM_MAP); if (!addr) return -ENOMEM; memset(addr, 0, PAGE_SIZE * num); - vm_unmap_ram(addr, num); + vunmap(addr); return 0; } -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu