From patchwork Mon Nov 25 23:10:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: John Hubbard X-Patchwork-Id: 11261105 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id B04641393 for ; Mon, 25 Nov 2019 23:12:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 90EC320835 for ; Mon, 25 Nov 2019 23:12:32 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="am7n03Sx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727386AbfKYXK6 (ORCPT ); Mon, 25 Nov 2019 18:10:58 -0500 Received: from hqemgate14.nvidia.com ([216.228.121.143]:1201 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727369AbfKYXK5 (ORCPT ); Mon, 25 Nov 2019 18:10:57 -0500 Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Mon, 25 Nov 2019 15:10:59 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Mon, 25 Nov 2019 15:10:56 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Mon, 25 Nov 2019 15:10:56 -0800 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL105.nvidia.com (172.20.187.12) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 25 Nov 2019 23:10:55 +0000 Received: from HQMAIL107.nvidia.com (172.20.187.13) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Mon, 25 Nov 2019 23:10:55 +0000 Received: from rnnvemgw01.nvidia.com (10.128.109.123) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Mon, 25 Nov 2019 23:10:54 +0000 Received: from blueforge.nvidia.com (Not Verified[10.110.48.28]) by rnnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Mon, 25 Nov 2019 15:10:54 -0800 From: John Hubbard To: Andrew Morton CC: Al Viro , Alex Williamson , Benjamin Herrenschmidt , =?utf-8?b?QmrDtnJuIFQ=?= =?utf-8?b?w7ZwZWw=?= , Christoph Hellwig , Dan Williams , Daniel Vetter , Dave Chinner , David Airlie , "David S . Miller" , Ira Weiny , Jan Kara , Jason Gunthorpe , Jens Axboe , Jonathan Corbet , =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , Magnus Karlsson , "Mauro Carvalho Chehab" , Michael Ellerman , Michal Hocko , Mike Kravetz , "Paul Mackerras" , Shuah Khan , Vlastimil Babka , , , , , , , , , , , , , LKML , John Hubbard Subject: [PATCH v2 13/19] net/xdp: set FOLL_PIN via pin_user_pages() Date: Mon, 25 Nov 2019 15:10:29 -0800 Message-ID: <20191125231035.1539120-14-jhubbard@nvidia.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191125231035.1539120-1-jhubbard@nvidia.com> References: <20191125231035.1539120-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=nvidia.com; s=n1; t=1574723459; bh=JiuMSIu1KROGnYN0FUrQmmZholMbEQnfhCSo9iAG4Tw=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Type:Content-Transfer-Encoding; b=am7n03SxEDA2wW1J6mZ2X+ilQZQsYd7ORZanwowT5m7cyX8aBFvu6zXt6NEW/Qtev gYsOVwZ2Laz9Mr97iKFDZOkmhB6t3KqliIsGcClrnT0vvmU3Y1h2Rpkzox8dIC0Zq2 T/rlzVTTrVnoDv3/j9Xu7KDv90cfBLgvev9wVZod5SzidCSFzBXLSCEsRy8uJEkhXV djilwa4fXWaE+SYmhzOie72MtsLCEoGx9LpNhfP062yQCP/G44VqxWi5wb5PjaDX+6 NmzcmMrjogRPx0kSFN8zlVIUexpwIinqoW6vud7C4OMf1xRSc3xiLVR1qeZl/YIRtu fJ1js7p9kC3Nw== Sender: linux-block-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Convert net/xdp to use the new pin_longterm_pages() call, which sets FOLL_PIN. Setting FOLL_PIN is now required for code that requires tracking of pinned pages. In partial anticipation of this work, the net/xdp code was already calling put_user_page() instead of put_page(). Therefore, in order to convert from the get_user_pages()/put_page() model, to the pin_user_pages()/put_user_page() model, the only change required here is to change get_user_pages() to pin_user_pages(). Acked-by: Björn Töpel Signed-off-by: John Hubbard --- net/xdp/xdp_umem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/xdp/xdp_umem.c b/net/xdp/xdp_umem.c index 3049af269fbf..d071003b5e76 100644 --- a/net/xdp/xdp_umem.c +++ b/net/xdp/xdp_umem.c @@ -291,7 +291,7 @@ static int xdp_umem_pin_pages(struct xdp_umem *umem) return -ENOMEM; down_read(¤t->mm->mmap_sem); - npgs = get_user_pages(umem->address, umem->npgs, + npgs = pin_user_pages(umem->address, umem->npgs, gup_flags | FOLL_LONGTERM, &umem->pgs[0], NULL); up_read(¤t->mm->mmap_sem);