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[216.228.112.21]) by smtp.gmail.com with ESMTPSA id u69sm111740800pgu.77.2019.08.06.18.34.02 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Tue, 06 Aug 2019 18:34:03 -0700 (PDT) X-Inumbo-ID: 709a1501-b8b3-11e9-8980-bc764e045a96 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=wKnEf1dGeTf0vHOLp5WCTJvqak8NT8hcLNnzrVdQpMI=; b=K8d7XfBVJ8I/mb7D/So0s6zKV29K6nxqxOt+bscjBjWDfj0QC4+NZ8AYd4oczxdsUX 7wYPGKgQnoRkCSwDEzT5rYkfZH7JJhJa6zaR/ydsa7uoMZJ2HjI2/BwiodCRxy0cgQ7K XR5LIHl94MzAJMcKyHWewTAlNkEf03nHhilsBgX1FcYreTK5la4X960fbNds2SN0gwIm bKXQLrcvXV5StThdICG212KTTY6r0QHSstMpGRVtwfJea1D8uaBa/9MN3hrGQMnPOq1P vjikEXBKeoKeYn0bHuTZu93yS1xwpaeL4dzZeJbSwqGj8iWMWHA9ZukGsRqP3BMDHZZx L72g== 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=wKnEf1dGeTf0vHOLp5WCTJvqak8NT8hcLNnzrVdQpMI=; b=e4HqFJXOoNT8r030lO+EDa7AleZt0c9u4+8uEniKYdvbTXiH29FfWSRozOikoj4Uxz 5Lcf2Ows3dbi3ClpJggR2eTfhqH/0EQajbAsVP0HPczGUGVmGVWj4muCTp2WoSNk6PL/ toQHm4/mfAff+9vyUaCYvtvBVSK5Deut9cBVLYAH3HccWv0wOMD4U52RtzOGMVQfeifP wHJviHxUeOHQGTQbWK6PVRQsN8uoGtYw33I5tmB0R7pmSr5asLwDSV25iJIMqLbgA+4q P+tBSvlf/3NF4fMzRL8UpFRshUz3k5myGnm4DKSWmSNnuWjzww0SwlVYhckQpSwfyX35 6ifg== X-Gm-Message-State: APjAAAVSD+VNXOaI+uXlA5oFlu19lRRgLStYVqtBcvArV2rd0cKGlqbU StO0fkaVIAa6Ny/5jSfOXhM= X-Google-Smtp-Source: APXvYqyq3BsS9DZUg5HbsH/cxAQFP71mzzuud27zN7KWsFT/18m4ES12yBRl2dAxm3nkOU3YhT47jw== X-Received: by 2002:a17:902:e30b:: with SMTP id cg11mr5920567plb.335.1565141643695; Tue, 06 Aug 2019 18:34:03 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Date: Tue, 6 Aug 2019 18:33:11 -0700 Message-Id: <20190807013340.9706-13-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190807013340.9706-1-jhubbard@nvidia.com> References: <20190807013340.9706-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Subject: [Xen-devel] [PATCH v3 12/41] genwqe: convert put_page() to put_user_page*() X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , 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, Arnd Bergmann , "Guilherme G . Piccoli" , John Hubbard , intel-gfx@lists.freedesktop.org, linux-block@vger.kernel.org, =?UTF-8?q?J=C3=A9r=C3=B4me=20Glisse?= , 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, Greg Kroah-Hartman , linux-fsdevel@vger.kernel.org, Frank Haverkamp Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) 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"). This changes the release code slightly, because each page slot in the page_list[] array is no longer checked for NULL. However, that check was wrong anyway, because the get_user_pages() pattern of usage here never allowed for NULL entries within a range of pinned pages. Acked-by: Greg Kroah-Hartman Cc: Frank Haverkamp Cc: Guilherme G. Piccoli Cc: Arnd Bergmann Cc: Greg Kroah-Hartman Signed-off-by: John Hubbard --- drivers/misc/genwqe/card_utils.c | 17 +++-------------- 1 file changed, 3 insertions(+), 14 deletions(-) diff --git a/drivers/misc/genwqe/card_utils.c b/drivers/misc/genwqe/card_ut= ils.c index 2e1c4d2905e8..2a888f31d2c5 100644 --- a/drivers/misc/genwqe/card_utils.c +++ b/drivers/misc/genwqe/card_utils.c @@ -517,24 +517,13 @@ int genwqe_free_sync_sgl(struct genwqe_dev *cd, struc= t genwqe_sgl *sgl) /** * genwqe_free_user_pages() - Give pinned pages back * - * Documentation of get_user_pages is in mm/gup.c: - * - * If the page is written to, set_page_dirty (or set_page_dirty_lock, - * as appropriate) must be called after the page is finished with, and - * before put_page is called. + * The pages may have been written to, so we call put_user_pages_dirty_loc= k(), + * rather than put_user_pages(). */ static int genwqe_free_user_pages(struct page **page_list, unsigned int nr_pages, int dirty) { - unsigned int i; - - for (i =3D 0; i < nr_pages; i++) { - if (page_list[i] !=3D NULL) { - if (dirty) - set_page_dirty_lock(page_list[i]); - put_page(page_list[i]); - } - } + put_user_pages_dirty_lock(page_list, nr_pages, dirty); return 0; } =20 --=20 2.22.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel