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[216.228.112.21]) by smtp.gmail.com with ESMTPSA id r6sm35946836pjb.22.2019.08.04.15.50.08 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 04 Aug 2019 15:50:09 -0700 (PDT) X-Inumbo-ID: 367641e9-b70a-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=46lxAY1z81U+mrrESVpVIrQ+fWJc6iHl4OExj8KwBEA=; b=TnoFvHk+U9GlniOKiXvWmHaHCeiVRyFhspf1Ucco3Opb6Zsra5EKt4aW1VdCEHOoOL B19ZrZSjdl4XOLjhMd/tz/suTkdRby0Q/hj5CJZSGF/pCKAPl5af/u3ds9o4NJugQJUH wah7eFEy+LBD8ieXrf5M4ghNwdqYF47d1zgnqfS2OWPzozoT/nJvTGXUM3ZYObcV1Nod /B+8RZc6MysuCMtgdDFKXIhBZ1vxh5KoYsW/S+ERZyza2fEF3JOhoez0XL3hqg3QsNHf A2vrE2EWhCkc/+2Bi4Qkus+K6o78OOjPZC/JIdc8d4G2oWHuj6EfQ91Jku0EJ0FsNSHa w9qg== 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=46lxAY1z81U+mrrESVpVIrQ+fWJc6iHl4OExj8KwBEA=; b=hweA30hNRLUZsTlyTjs0YKISnkLbRc/+1TC/h8BnnKbvKLP/eZwhuN0W9QUEeI38RW b5PH68Fzs8xExTZI4jULTAwHfjwOYus1hsgGG7g823+5AfxNMsAPi/qYloWY1a+QkByg 5CQzxtN3m8j6xp1Ve59wSqj1NKJ/PWoCooYSr7Ynse47f77VK6kCHIkMnTgSXKCW34Gb 9kjFMuKaCWc0hlgHxMTNJP7SILAzpa0O+Bh6AiTBREiE8xeCEj3139zApv327TMb1vDm fXOXsIuEJyQIVdcSnX5ATBm7Rn4JFsBDmqyc+UryiJN7V7YDF4p0TPClggz0wUq6wTNk l0VA== X-Gm-Message-State: APjAAAXLfcJNi2V1uLiM8uUS3+uKqH7IOy/zrMct/9Gju59hEkhcHi5B jQi0uJra/k4Q/LNCheJWzA4= X-Google-Smtp-Source: APXvYqzB7V+habp3I96Q8m7XMJqRYvky1QL0M1s1kWUjAVtyhhVWp0HvJtmcLDTq9kGGDNeFtLuO/Q== X-Received: by 2002:a17:902:9a84:: with SMTP id w4mr21647219plp.160.1564959010056; Sun, 04 Aug 2019 15:50:10 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Date: Sun, 4 Aug 2019 15:49:13 -0700 Message-Id: <20190804224915.28669-33-jhubbard@nvidia.com> X-Mailer: git-send-email 2.22.0 In-Reply-To: <20190804224915.28669-1-jhubbard@nvidia.com> References: <20190804224915.28669-1-jhubbard@nvidia.com> MIME-Version: 1.0 X-NVConfidentiality: public Subject: [Xen-devel] [PATCH v2 32/34] goldfish_pipe: 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 , Roman Kiryanov , 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?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 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"). Note that this effectively changes the code's behavior in qp_release_pages(): it now ultimately calls set_page_dirty_lock(), instead of set_page_dirty(). This is probably more accurate. As Christoph Hellwig put it, "set_page_dirty() is only safe if we are dealing with a file backed page where we have reference on the inode it hangs off." [1] [1] https://lore.kernel.org/r/20190723153640.GB720@lst.de Cc: Greg Kroah-Hartman Cc: Roman Kiryanov Signed-off-by: John Hubbard --- drivers/platform/goldfish/goldfish_pipe.c | 9 +++------ 1 file changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/platform/goldfish/goldfish_pipe.c b/drivers/platform/g= oldfish/goldfish_pipe.c index cef0133aa47a..2bd21020e288 100644 --- a/drivers/platform/goldfish/goldfish_pipe.c +++ b/drivers/platform/goldfish/goldfish_pipe.c @@ -288,15 +288,12 @@ static int pin_user_pages(unsigned long first_page, static void release_user_pages(struct page **pages, int pages_count, int is_write, s32 consumed_size) { - int i; + bool dirty =3D !is_write && consumed_size > 0; =20 - for (i =3D 0; i < pages_count; i++) { - if (!is_write && consumed_size > 0) - set_page_dirty(pages[i]); - put_page(pages[i]); - } + put_user_pages_dirty_lock(pages, pages_count, dirty); } =20 + /* Populate the call parameters, merging adjacent pages together */ static void populate_rw_params(struct page **pages, int pages_count, --=20 2.22.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel