From patchwork Fri Aug 2 02:16:20 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: john.hubbard@gmail.com X-Patchwork-Id: 11072951 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5594C13A4 for ; Fri, 2 Aug 2019 08:21:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 455C92875C for ; Fri, 2 Aug 2019 08:21:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3902C287BE; Fri, 2 Aug 2019 08:21:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 893F22875C for ; Fri, 2 Aug 2019 08:21:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 608206ED31; Fri, 2 Aug 2019 08:19:46 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pg1-x543.google.com (mail-pg1-x543.google.com [IPv6:2607:f8b0:4864:20::543]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4991F6E85E; Fri, 2 Aug 2019 02:17:00 +0000 (UTC) Received: by mail-pg1-x543.google.com with SMTP id o13so35214858pgp.12; Thu, 01 Aug 2019 19:17:00 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=qVOEtC+FJUT8up8TCOoMm5YvZPMSmdk5e2B42ED2yyM=; b=kQGEAG3T+m8fOMUzKBHhCfIn0V/+m2MLWbDtXtFxERBv0Vo14TxGWQH0g6BYMAXnGU ozxModCTmcSwonAaRzo29YWp4A6HlJ2QBQcYMKd7wKpXiOhsDN43SLeN8yvlCLAdsIJ3 4pjYo10DL+4FJYRvJy9UDCygxhqhSxZzYkSAnXreEko8C3inbn6bYi3FtkFvLD5SzAQU 76zdZFeGX7aEo09bVeUUeKOxXiexpkl9ceb5Ba0gD7URDv3rvoNoIrzxduuMBTg9Udxy VDu/Vt+O88mmdhJrLzB7W7eFzm/HwgTiIdypwUYRzJUR9cKPTtnUYM1C1rlu9ibFri5I K42g== X-Gm-Message-State: APjAAAXHdVecl/Y2hWvgdBG+n/8CVzlN1ZqRSWxqBXEBJVwlMNbHfU4d M3HEsvDJbR7TQyM57UHd4iE= X-Google-Smtp-Source: APXvYqw2S5JdGupbqvZdIIqjMukPwNC3gLPKrMG21trP7y7Ol04k+QnkewfeqIGmjfDk06lFiTCaHg== X-Received: by 2002:aa7:90d4:: with SMTP id k20mr12633478pfk.78.1564712219893; Thu, 01 Aug 2019 19:16:59 -0700 (PDT) Received: from blueforge.nvidia.com (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id p187sm118200292pfg.89.2019.08.01.19.16.58 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 01 Aug 2019 19:16:59 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Subject: [PATCH 01/34] mm/gup: add make_dirty arg to put_user_pages_dirty_lock() Date: Thu, 1 Aug 2019 19:16:20 -0700 Message-Id: <20190802021653.4882-2-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190802021653.4882-1-jhubbard@nvidia.com> References: <20190802021653.4882-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public X-Mailman-Approved-At: Fri, 02 Aug 2019 08:19:03 +0000 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=qVOEtC+FJUT8up8TCOoMm5YvZPMSmdk5e2B42ED2yyM=; b=ukzb5bY0dD46KGXV7CH7yz04BRNR061FKYR9hNz7rbtA4m3PeuF0KKl8eqWWySHPYx qHTCJ+DrmOmw/+xikP17jl7twdln0u0SFZpk1B09q/bQ6IEd1+91SkWVISKDmwJ5R6GK 4WWyhsPvTSwbTlkNgQnhHFgrn3+x9+K64k+sI36/9jpXOmtjH/jmUA/Sj4SYmn10jDnE r7TYPK4sSlnEUUDApSOXFQUX5rQcwET4H+VN6Xe+iN1m2f84OQcRvPADB5Aml4BXycR/ T5z1ogXjUH/b2fTUcxAlW+xo8tStjNqQXkZJM1EXcCk/zT8JQ66XBoqwU6t+J0iFbLQP +KbA== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Jan Kara , kvm@vger.kernel.org, Dave Hansen , Dave Chinner , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, Matthew Wilcox , sparclinux@vger.kernel.org, Ira Weiny , ceph-devel@vger.kernel.org, devel@driverdev.osuosl.org, rds-devel@oss.oracle.com, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, Christoph Hellwig , Christoph Hellwig , Jason Gunthorpe , xen-devel@lists.xenproject.org, devel@lists.orangefs.org, linux-media@vger.kernel.org, John Hubbard , intel-gfx@lists.freedesktop.org, linux-block@vger.kernel.org, =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , linux-rpi-kernel@lists.infradead.org, Dan Williams , linux-arm-kernel@lists.infradead.org, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, LKML , linux-xfs@vger.kernel.org, linux-crypto@vger.kernel.org, linux-fsdevel@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: John Hubbard Provide more capable variation of put_user_pages_dirty_lock(), and delete put_user_pages_dirty(). This is based on the following: 1. Lots of call sites become simpler if a bool is passed into put_user_page*(), instead of making the call site choose which put_user_page*() variant to call. 2. Christoph Hellwig's observation that set_page_dirty_lock() is usually correct, and set_page_dirty() is usually a bug, or at least questionable, within a put_user_page*() calling chain. This leads to the following API choices: * put_user_pages_dirty_lock(page, npages, make_dirty) * There is no put_user_pages_dirty(). You have to hand code that, in the rare case that it's required. Cc: Matthew Wilcox Cc: Jan Kara Cc: Christoph Hellwig Cc: Ira Weiny Cc: Jason Gunthorpe Signed-off-by: John Hubbard --- drivers/infiniband/core/umem.c | 5 +- drivers/infiniband/hw/hfi1/user_pages.c | 5 +- drivers/infiniband/hw/qib/qib_user_pages.c | 5 +- drivers/infiniband/hw/usnic/usnic_uiom.c | 5 +- drivers/infiniband/sw/siw/siw_mem.c | 10 +- include/linux/mm.h | 5 +- mm/gup.c | 115 +++++++++------------ 7 files changed, 58 insertions(+), 92 deletions(-) diff --git a/drivers/infiniband/core/umem.c b/drivers/infiniband/core/umem.c index 08da840ed7ee..965cf9dea71a 100644 --- a/drivers/infiniband/core/umem.c +++ b/drivers/infiniband/core/umem.c @@ -54,10 +54,7 @@ static void __ib_umem_release(struct ib_device *dev, struct ib_umem *umem, int d for_each_sg_page(umem->sg_head.sgl, &sg_iter, umem->sg_nents, 0) { page = sg_page_iter_page(&sg_iter); - if (umem->writable && dirty) - put_user_pages_dirty_lock(&page, 1); - else - put_user_page(page); + put_user_pages_dirty_lock(&page, 1, umem->writable && dirty); } sg_free_table(&umem->sg_head); diff --git a/drivers/infiniband/hw/hfi1/user_pages.c b/drivers/infiniband/hw/hfi1/user_pages.c index b89a9b9aef7a..469acb961fbd 100644 --- a/drivers/infiniband/hw/hfi1/user_pages.c +++ b/drivers/infiniband/hw/hfi1/user_pages.c @@ -118,10 +118,7 @@ int hfi1_acquire_user_pages(struct mm_struct *mm, unsigned long vaddr, size_t np void hfi1_release_user_pages(struct mm_struct *mm, struct page **p, size_t npages, bool dirty) { - if (dirty) - put_user_pages_dirty_lock(p, npages); - else - put_user_pages(p, npages); + put_user_pages_dirty_lock(p, npages, dirty); if (mm) { /* during close after signal, mm can be NULL */ atomic64_sub(npages, &mm->pinned_vm); diff --git a/drivers/infiniband/hw/qib/qib_user_pages.c b/drivers/infiniband/hw/qib/qib_user_pages.c index bfbfbb7e0ff4..6bf764e41891 100644 --- a/drivers/infiniband/hw/qib/qib_user_pages.c +++ b/drivers/infiniband/hw/qib/qib_user_pages.c @@ -40,10 +40,7 @@ static void __qib_release_user_pages(struct page **p, size_t num_pages, int dirty) { - if (dirty) - put_user_pages_dirty_lock(p, num_pages); - else - put_user_pages(p, num_pages); + put_user_pages_dirty_lock(p, num_pages, dirty); } /** diff --git a/drivers/infiniband/hw/usnic/usnic_uiom.c b/drivers/infiniband/hw/usnic/usnic_uiom.c index 0b0237d41613..62e6ffa9ad78 100644 --- a/drivers/infiniband/hw/usnic/usnic_uiom.c +++ b/drivers/infiniband/hw/usnic/usnic_uiom.c @@ -75,10 +75,7 @@ static void usnic_uiom_put_pages(struct list_head *chunk_list, int dirty) for_each_sg(chunk->page_list, sg, chunk->nents, i) { page = sg_page(sg); pa = sg_phys(sg); - if (dirty) - put_user_pages_dirty_lock(&page, 1); - else - put_user_page(page); + put_user_pages_dirty_lock(&page, 1, dirty); usnic_dbg("pa: %pa\n", &pa); } kfree(chunk); diff --git a/drivers/infiniband/sw/siw/siw_mem.c b/drivers/infiniband/sw/siw/siw_mem.c index 67171c82b0c4..ab83a9cec562 100644 --- a/drivers/infiniband/sw/siw/siw_mem.c +++ b/drivers/infiniband/sw/siw/siw_mem.c @@ -63,15 +63,7 @@ struct siw_mem *siw_mem_id2obj(struct siw_device *sdev, int stag_index) static void siw_free_plist(struct siw_page_chunk *chunk, int num_pages, bool dirty) { - struct page **p = chunk->plist; - - while (num_pages--) { - if (!PageDirty(*p) && dirty) - put_user_pages_dirty_lock(p, 1); - else - put_user_page(*p); - p++; - } + put_user_pages_dirty_lock(chunk->plist, num_pages, dirty); } void siw_umem_release(struct siw_umem *umem, bool dirty) diff --git a/include/linux/mm.h b/include/linux/mm.h index 0334ca97c584..9759b6a24420 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1057,8 +1057,9 @@ static inline void put_user_page(struct page *page) put_page(page); } -void put_user_pages_dirty(struct page **pages, unsigned long npages); -void put_user_pages_dirty_lock(struct page **pages, unsigned long npages); +void put_user_pages_dirty_lock(struct page **pages, unsigned long npages, + bool make_dirty); + void put_user_pages(struct page **pages, unsigned long npages); #if defined(CONFIG_SPARSEMEM) && !defined(CONFIG_SPARSEMEM_VMEMMAP) diff --git a/mm/gup.c b/mm/gup.c index 98f13ab37bac..7fefd7ab02c4 100644 --- a/mm/gup.c +++ b/mm/gup.c @@ -29,85 +29,70 @@ struct follow_page_context { unsigned int page_mask; }; -typedef int (*set_dirty_func_t)(struct page *page); - -static void __put_user_pages_dirty(struct page **pages, - unsigned long npages, - set_dirty_func_t sdf) -{ - unsigned long index; - - for (index = 0; index < npages; index++) { - struct page *page = compound_head(pages[index]); - - /* - * Checking PageDirty at this point may race with - * clear_page_dirty_for_io(), but that's OK. Two key cases: - * - * 1) This code sees the page as already dirty, so it skips - * the call to sdf(). That could happen because - * clear_page_dirty_for_io() called page_mkclean(), - * followed by set_page_dirty(). However, now the page is - * going to get written back, which meets the original - * intention of setting it dirty, so all is well: - * clear_page_dirty_for_io() goes on to call - * TestClearPageDirty(), and write the page back. - * - * 2) This code sees the page as clean, so it calls sdf(). - * The page stays dirty, despite being written back, so it - * gets written back again in the next writeback cycle. - * This is harmless. - */ - if (!PageDirty(page)) - sdf(page); - - put_user_page(page); - } -} - /** - * put_user_pages_dirty() - release and dirty an array of gup-pinned pages - * @pages: array of pages to be marked dirty and released. + * put_user_pages_dirty_lock() - release and optionally dirty gup-pinned pages + * @pages: array of pages to be maybe marked dirty, and definitely released. * @npages: number of pages in the @pages array. + * @make_dirty: whether to mark the pages dirty * * "gup-pinned page" refers to a page that has had one of the get_user_pages() * variants called on that page. * * For each page in the @pages array, make that page (or its head page, if a - * compound page) dirty, if it was previously listed as clean. Then, release - * the page using put_user_page(). + * compound page) dirty, if @make_dirty is true, and if the page was previously + * listed as clean. In any case, releases all pages using put_user_page(), + * possibly via put_user_pages(), for the non-dirty case. * * Please see the put_user_page() documentation for details. * - * set_page_dirty(), which does not lock the page, is used here. - * Therefore, it is the caller's responsibility to ensure that this is - * safe. If not, then put_user_pages_dirty_lock() should be called instead. + * set_page_dirty_lock() is used internally. If instead, set_page_dirty() is + * required, then the caller should a) verify that this is really correct, + * because _lock() is usually required, and b) hand code it: + * set_page_dirty_lock(), put_user_page(). * */ -void put_user_pages_dirty(struct page **pages, unsigned long npages) +void put_user_pages_dirty_lock(struct page **pages, unsigned long npages, + bool make_dirty) { - __put_user_pages_dirty(pages, npages, set_page_dirty); -} -EXPORT_SYMBOL(put_user_pages_dirty); + unsigned long index; -/** - * put_user_pages_dirty_lock() - release and dirty an array of gup-pinned pages - * @pages: array of pages to be marked dirty and released. - * @npages: number of pages in the @pages array. - * - * For each page in the @pages array, make that page (or its head page, if a - * compound page) dirty, if it was previously listed as clean. Then, release - * the page using put_user_page(). - * - * Please see the put_user_page() documentation for details. - * - * This is just like put_user_pages_dirty(), except that it invokes - * set_page_dirty_lock(), instead of set_page_dirty(). - * - */ -void put_user_pages_dirty_lock(struct page **pages, unsigned long npages) -{ - __put_user_pages_dirty(pages, npages, set_page_dirty_lock); + /* + * TODO: this can be optimized for huge pages: if a series of pages is + * physically contiguous and part of the same compound page, then a + * single operation to the head page should suffice. + */ + + if (!make_dirty) { + put_user_pages(pages, npages); + return; + } + + for (index = 0; index < npages; index++) { + struct page *page = compound_head(pages[index]); + /* + * Checking PageDirty at this point may race with + * clear_page_dirty_for_io(), but that's OK. Two key + * cases: + * + * 1) This code sees the page as already dirty, so it + * skips the call to set_page_dirty(). That could happen + * because clear_page_dirty_for_io() called + * page_mkclean(), followed by set_page_dirty(). + * However, now the page is going to get written back, + * which meets the original intention of setting it + * dirty, so all is well: clear_page_dirty_for_io() goes + * on to call TestClearPageDirty(), and write the page + * back. + * + * 2) This code sees the page as clean, so it calls + * set_page_dirty(). The page stays dirty, despite being + * written back, so it gets written back again in the + * next writeback cycle. This is harmless. + */ + if (!PageDirty(page)) + set_page_dirty_lock(page); + put_user_page(page); + } } EXPORT_SYMBOL(put_user_pages_dirty_lock); From patchwork Fri Aug 2 02:16:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: john.hubbard@gmail.com X-Patchwork-Id: 11072957 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 54C5D13A4 for ; Fri, 2 Aug 2019 08:21:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 42B0F2875E for ; Fri, 2 Aug 2019 08:21:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 359C9287D4; Fri, 2 Aug 2019 08:21:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_ADSP_CUSTOM_MED, FREEMAIL_FROM,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=unavailable version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D6E082875E for ; Fri, 2 Aug 2019 08:21:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0672C6ED3C; Fri, 2 Aug 2019 08:19:47 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail-pg1-x544.google.com (mail-pg1-x544.google.com [IPv6:2607:f8b0:4864:20::544]) by gabe.freedesktop.org (Postfix) with ESMTPS id DBF1A6E85E; Fri, 2 Aug 2019 02:17:01 +0000 (UTC) Received: by mail-pg1-x544.google.com with SMTP id d1so2414608pgp.4; Thu, 01 Aug 2019 19:17:01 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=qSYlns3rxzw4u/DyjG2ivKH4pSlvpz3tTvNpv+Vzl0A=; b=NP0ZfUSoQXiJCspNDbztyS86gyCdcGnGRbllhU7zRoVDJU4KKMY7SWMYgCxQSHvEQf JWYkyK6MsQqIo48QipnWmhmxUX8+SgYNPYkRKigvtXQzC5QSWtZW9JV0X8K3LWcovSMF Id7SEvTCZU8WwVvUREpREbSci6rJkKvLYwHYXLwYConMHWzGV6l2BbBxvR4ZU0NI71Z3 s0P62vN+ocDc78fC5GD0n87XBvGqI3JL2j2D9a0nDL1OmHXm5nS0hfV/QQqWoDHfEb9O KV3Y+MLY+ntuu5iGrLYnvkSXRwHiDdHJQz+dWRUqpitEgMB0XCUT6RabiUitOieJeb4z Zk7Q== X-Gm-Message-State: APjAAAXDJOC4WS5iTCudREcoXbVZ5nxGboj/nV20kHqMtx3reMGMBVrH DAwU83KbEJLOceExFAO0S3Q= X-Google-Smtp-Source: APXvYqzbu0fqyx1S9wHk9TZWdOKFNLR8W4aJ20JQpVBVWnaUPwqEe+RFqTrVv58Rvjaf0s5gNM1HPA== X-Received: by 2002:a17:90a:ba93:: with SMTP id t19mr1809345pjr.139.1564712221494; Thu, 01 Aug 2019 19:17:01 -0700 (PDT) Received: from blueforge.nvidia.com (searspoint.nvidia.com. [216.228.112.21]) by smtp.gmail.com with ESMTPSA id p187sm118200292pfg.89.2019.08.01.19.16.59 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 01 Aug 2019 19:17:00 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Subject: [PATCH 02/34] net/rds: convert put_page() to put_user_page*() Date: Thu, 1 Aug 2019 19:16:21 -0700 Message-Id: <20190802021653.4882-3-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190802021653.4882-1-jhubbard@nvidia.com> References: <20190802021653.4882-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public X-Mailman-Approved-At: Fri, 02 Aug 2019 08:19:03 +0000 X-Mailman-Original-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=qSYlns3rxzw4u/DyjG2ivKH4pSlvpz3tTvNpv+Vzl0A=; b=ri/g8fH5EMbaRGeRCBUMa0gqvf5sZKxxRTcoGNlKvndtobuEMarAmuyiWR0Or0yt3d ZgeLr0P+kW4cqW28KQH/rOYsII5pR9Pk0M0WFYUApB7SKz6vEgjXY+F34hxONagLYY9L Py6Blyj3NR1ZdTatlTm5llaJcajjxdcYrAkl23WVqTVg9XAD+0Qg+cC1rauwop+vVeNx bVVFBfM1nAEvoH8ncIKlerRWnqRBlhjzlfCDLJ981KoDXyQRyzFGpLUw/iRcSWFkJ5xl t+5zV5laKnX+3Bq/BiZ3lREDjIqp5Q8qRulPXvOqGHi7pfUVWIrfUbywjbnDPsqYnoHP +z/w== X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-fbdev@vger.kernel.org, Jan Kara , kvm@vger.kernel.org, Dave Hansen , Dave Chinner , dri-devel@lists.freedesktop.org, linux-mm@kvack.org, sparclinux@vger.kernel.org, Ira Weiny , ceph-devel@vger.kernel.org, devel@driverdev.osuosl.org, rds-devel@oss.oracle.com, linux-rdma@vger.kernel.org, x86@kernel.org, amd-gfx@lists.freedesktop.org, Christoph Hellwig , Jason Gunthorpe , xen-devel@lists.xenproject.org, devel@lists.orangefs.org, linux-media@vger.kernel.org, John Hubbard , intel-gfx@lists.freedesktop.org, Santosh Shilimkar , linux-block@vger.kernel.org, =?utf-8?b?SsOpcsO0bWUgR2xpc3Nl?= , linux-rpi-kernel@lists.infradead.org, Dan Williams , linux-arm-kernel@lists.infradead.org, linux-nfs@vger.kernel.org, netdev@vger.kernel.org, LKML , linux-xfs@vger.kernel.org, linux-crypto@vger.kernel.org, linux-fsdevel@vger.kernel.org, "David S . Miller" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: John Hubbard For pages that were retained via get_user_pages*(), release those pages via the new put_user_page*() routines, instead of via put_page() or release_pages(). This is part a tree-wide conversion, as described in commit fc1d8e7cca2d ("mm: introduce put_user_page*(), placeholder versions"). Cc: Santosh Shilimkar Cc: David S. Miller Cc: netdev@vger.kernel.org Cc: linux-rdma@vger.kernel.org Cc: rds-devel@oss.oracle.com Signed-off-by: John Hubbard --- net/rds/info.c | 5 ++--- net/rds/message.c | 2 +- net/rds/rdma.c | 15 +++++++-------- 3 files changed, 10 insertions(+), 12 deletions(-) diff --git a/net/rds/info.c b/net/rds/info.c index 03f6fd56d237..ca6af2889adf 100644 --- a/net/rds/info.c +++ b/net/rds/info.c @@ -162,7 +162,6 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval, struct rds_info_lengths lens; unsigned long nr_pages = 0; unsigned long start; - unsigned long i; rds_info_func func; struct page **pages = NULL; int ret; @@ -235,8 +234,8 @@ int rds_info_getsockopt(struct socket *sock, int optname, char __user *optval, ret = -EFAULT; out: - for (i = 0; pages && i < nr_pages; i++) - put_page(pages[i]); + if (pages) + put_user_pages(pages, nr_pages); kfree(pages); return ret; diff --git a/net/rds/message.c b/net/rds/message.c index 50f13f1d4ae0..d7b0d266c437 100644 --- a/net/rds/message.c +++ b/net/rds/message.c @@ -404,7 +404,7 @@ static int rds_message_zcopy_from_user(struct rds_message *rm, struct iov_iter * int i; for (i = 0; i < rm->data.op_nents; i++) - put_page(sg_page(&rm->data.op_sg[i])); + put_user_page(sg_page(&rm->data.op_sg[i])); mmp = &rm->data.op_mmp_znotifier->z_mmp; mm_unaccount_pinned_pages(mmp); ret = -EFAULT; diff --git a/net/rds/rdma.c b/net/rds/rdma.c index 916f5ec373d8..6762e8696b99 100644 --- a/net/rds/rdma.c +++ b/net/rds/rdma.c @@ -162,8 +162,7 @@ static int rds_pin_pages(unsigned long user_addr, unsigned int nr_pages, pages); if (ret >= 0 && ret < nr_pages) { - while (ret--) - put_page(pages[ret]); + put_user_pages(pages, ret); ret = -EFAULT; } @@ -276,7 +275,7 @@ static int __rds_rdma_map(struct rds_sock *rs, struct rds_get_mr_args *args, if (IS_ERR(trans_private)) { for (i = 0 ; i < nents; i++) - put_page(sg_page(&sg[i])); + put_user_page(sg_page(&sg[i])); kfree(sg); ret = PTR_ERR(trans_private); goto out; @@ -464,9 +463,10 @@ void rds_rdma_free_op(struct rm_rdma_op *ro) * to local memory */ if (!ro->op_write) { WARN_ON(!page->mapping && irqs_disabled()); - set_page_dirty(page); + put_user_pages_dirty_lock(&page, 1, true); + } else { + put_user_page(page); } - put_page(page); } kfree(ro->op_notifier); @@ -481,8 +481,7 @@ void rds_atomic_free_op(struct rm_atomic_op *ao) /* Mark page dirty if it was possibly modified, which * is the case for a RDMA_READ which copies from remote * to local memory */ - set_page_dirty(page); - put_page(page); + put_user_pages_dirty_lock(&page, 1, true); kfree(ao->op_notifier); ao->op_notifier = NULL; @@ -867,7 +866,7 @@ int rds_cmsg_atomic(struct rds_sock *rs, struct rds_message *rm, return ret; err: if (page) - put_page(page); + put_user_page(page); rm->atomic.op_active = 0; kfree(rm->atomic.op_notifier);