From patchwork Sun Nov 3 21:18:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: John Hubbard X-Patchwork-Id: 11224495 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 3B048913 for ; Sun, 3 Nov 2019 21:18:31 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id F2FAE21A4A for ; Sun, 3 Nov 2019 21:18:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=nvidia.com header.i=@nvidia.com header.b="ex5YaZO2" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F2FAE21A4A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=nvidia.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 2BD116B000A; Sun, 3 Nov 2019 16:18:22 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 2941D6B000C; Sun, 3 Nov 2019 16:18:22 -0500 (EST) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 134CD6B000D; Sun, 3 Nov 2019 16:18:22 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0112.hostedemail.com [216.40.44.112]) by kanga.kvack.org (Postfix) with ESMTP id DC4F26B000A for ; Sun, 3 Nov 2019 16:18:21 -0500 (EST) Received: from smtpin20.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with SMTP id 9BE9052A8 for ; Sun, 3 Nov 2019 21:18:21 +0000 (UTC) X-FDA: 76116229602.20.cat40_83223e493fc48 X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,jhubbard@nvidia.com,:akpm@linux-foundation.org:viro@zeniv.linux.org.uk:alex.williamson@redhat.com:benh@kernel.crashing.org:bjorn.topel@intel.com:hch@infradead.org:dan.j.williams@intel.com:daniel@ffwll.ch:david@fromorbit.com:airlied@linux.ie:davem@davemloft.net:ira.weiny@intel.com:jack@suse.cz:jgg@ziepe.ca:axboe@kernel.dk:corbet@lwn.net:jglisse@redhat.com:magnus.karlsson@intel.com:mchehab@kernel.org:mpe@ellerman.id.au:mhocko@suse.com:mike.kravetz@oracle.com:paulus@samba.org:shuah@kernel.org:vbabka@suse.cz:bpf@vger.kernel.org:dri-devel@lists.freedesktop.org:kvm@vger.kernel.org:linux-block@vger.kernel.org:linux-doc@vger.kernel.org:linux-fsdevel@vger.kernel.org:linux-kselftest@vger.kernel.org:linux-media@vger.kernel.org:linux-rdma@vger.kernel.org:linuxppc-dev@lists.ozlabs.org:netdev@vger.kernel.org::linux-kernel@vger.kernel.org:jhubbard@nvidia.com,RULES_HIT:30051:30054:30064:30070:30090,0,RBL:216.228.121.143:@nvidia.com:.lbl8.mailshell.net- 62.18.0. X-HE-Tag: cat40_83223e493fc48 X-Filterd-Recvd-Size: 5751 Received: from hqemgate14.nvidia.com (hqemgate14.nvidia.com [216.228.121.143]) by imf48.hostedemail.com (Postfix) with ESMTP for ; Sun, 3 Nov 2019 21:18:20 +0000 (UTC) Received: from hqpgpgate101.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com (using TLS: TLSv1.2, DES-CBC3-SHA) id ; Sun, 03 Nov 2019 13:18:24 -0800 Received: from hqmail.nvidia.com ([172.20.161.6]) by hqpgpgate101.nvidia.com (PGP Universal service); Sun, 03 Nov 2019 13:18:18 -0800 X-PGP-Universal: processed; by hqpgpgate101.nvidia.com on Sun, 03 Nov 2019 13:18:18 -0800 Received: from HQMAIL109.nvidia.com (172.20.187.15) by HQMAIL107.nvidia.com (172.20.187.13) with Microsoft SMTP Server (TLS) id 15.0.1473.3; Sun, 3 Nov 2019 21:18:17 +0000 Received: from hqnvemgw01.nvidia.com (172.20.150.20) by HQMAIL109.nvidia.com (172.20.187.15) with Microsoft SMTP Server (TLS) id 15.0.1473.3 via Frontend Transport; Sun, 3 Nov 2019 21:18:17 +0000 Received: from blueforge.nvidia.com (Not Verified[10.110.48.28]) by hqnvemgw01.nvidia.com with Trustwave SEG (v7,5,8,10121) id ; Sun, 03 Nov 2019 13:18:17 -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 13/18] media/v4l2-core: pin_longterm_pages (FOLL_PIN) and put_user_page() conversion Date: Sun, 3 Nov 2019 13:18:08 -0800 Message-ID: <20191103211813.213227-14-jhubbard@nvidia.com> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20191103211813.213227-1-jhubbard@nvidia.com> References: <20191103211813.213227-1-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=1572815904; bh=2ylru9iMViXhFgX9NY0Q3+yFTIQYaU15HbY2+xHJ5C4=; h=X-PGP-Universal:From:To:CC:Subject:Date:Message-ID:X-Mailer: In-Reply-To:References:MIME-Version:X-NVConfidentiality: Content-Transfer-Encoding:Content-Type; b=ex5YaZO2FQ75+37+4GgQrb+MHY+nPxHJJ/itwtobXgAbSDiul7ENJ4eK/KWUrmmAx upeS7iJDT1Oe4ipt1geERaDDUXQz28Pr2J89PZF91qYMwXSg2Ymi62IF7eDHVGxAWS yeQkaaUp3HoC5o96OCXbspJYHCqOsoGQIC+zKqSSklBZBX8UPdaBw/Abx4VpFW/m9X GrdpmB5MZ+80JHSR1DwFf+v+M9JYACC7Ve21sWkvrf+AbcHchSOv0zvCPx0TVTHwdl 1E+ZXw6GkVYBJfU5hfqglHdQunB5gKoi9NIbsxShwKGSlIkHPbN7upQmNHzsFTWYqw yu763Y1CcLtpg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 1. Change v4l2 from get_user_pages(FOLL_LONGTERM), to pin_longterm_pages(), which sets both FOLL_LONGTERM and FOLL_PIN. 2. Because all FOLL_PIN-acquired pages must be released via put_user_page(), also convert the put_page() call over to put_user_pages_dirty_lock(). Reviewed-by: Ira Weiny Cc: Mauro Carvalho Chehab Signed-off-by: John Hubbard Acked-by: Hans Verkuil --- drivers/media/v4l2-core/videobuf-dma-sg.c | 13 +++++-------- 1 file changed, 5 insertions(+), 8 deletions(-) diff --git a/drivers/media/v4l2-core/videobuf-dma-sg.c b/drivers/media/v4l2-core/videobuf-dma-sg.c index 28262190c3ab..9b9c5b37bf59 100644 --- a/drivers/media/v4l2-core/videobuf-dma-sg.c +++ b/drivers/media/v4l2-core/videobuf-dma-sg.c @@ -183,12 +183,12 @@ static int videobuf_dma_init_user_locked(struct videobuf_dmabuf *dma, dprintk(1, "init user [0x%lx+0x%lx => %d pages]\n", data, size, dma->nr_pages); - err = get_user_pages(data & PAGE_MASK, dma->nr_pages, - flags | FOLL_LONGTERM, dma->pages, NULL); + err = pin_longterm_pages(data & PAGE_MASK, dma->nr_pages, + flags, dma->pages, NULL); if (err != dma->nr_pages) { dma->nr_pages = (err >= 0) ? err : 0; - dprintk(1, "get_user_pages: err=%d [%d]\n", err, + dprintk(1, "pin_longterm_pages: err=%d [%d]\n", err, dma->nr_pages); return err < 0 ? err : -EINVAL; } @@ -349,11 +349,8 @@ int videobuf_dma_free(struct videobuf_dmabuf *dma) BUG_ON(dma->sglen); if (dma->pages) { - for (i = 0; i < dma->nr_pages; i++) { - if (dma->direction == DMA_FROM_DEVICE) - set_page_dirty_lock(dma->pages[i]); - put_page(dma->pages[i]); - } + put_user_pages_dirty_lock(dma->pages, dma->nr_pages, + dma->direction == DMA_FROM_DEVICE); kfree(dma->pages); dma->pages = NULL; }