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[216.228.112.21]) by smtp.gmail.com with ESMTPSA id r6sm35946836pjb.22.2019.08.04.15.49.44 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Sun, 04 Aug 2019 15:49:45 -0700 (PDT) X-Inumbo-ID: 2860419b-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=1X33MY8P1PVcaLkCZcp6PkXiHV9wvPThIXgNE9TFbj4=; b=L35X2QFh0M4JIQvOmPagjixwdLqggClkiY/ITRED3vd5cYmML5rpnhsQYVeJG55L7X lfpM/Rw8+9+KW1xLlbUjjd2pEukAuHL9FPW2brNIFLNAAe+xFNLiBhvXwHgfebwSPh6b PQimMsMZnxgRdBC8pyrRMZ9Xs902qjGDWwSRlQpLzHZkXMK6vYaJ7jNHAlwygvXZxKWD HRNszvS/yLW3PMoeuHrejzjB7JHf9PJVVvjCC1Gi8OYeSyaj8QqsLJjtyVPXxwKbhU1l 56SfAsWTx6H5Myy0JvyaDz6KAPklX1grAzJq4JD5PKOSOMwKa+X4MP3JYOJahIqu806a 4oGw== 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=1X33MY8P1PVcaLkCZcp6PkXiHV9wvPThIXgNE9TFbj4=; b=G5/lWsD4EI3VaPbv3an4zrtcQ28cycZtJzBXcRWHLp/Kdu6DYrSr040xgY6xsm792K sgPzXxjluaFmY0H4+aiGXlQYNkcf8tairtZiTTsrw4jdUO61je7EsGG3Hdv+puC5s7iX rE3rVLFatnx+lohSJ8OA/xhQCezFeSYs3UdKDXidXXLlmxkDxLftcY5YpAmXwDmtEkgc G+chG5byvzrw4dV7Kk7rfS2rOCJX6IKlmYooX/plsWQfIwZHEYZXLSkz5J7phULb+wVb REVh4PhQeWRuKdOys39IzCihVGUWkzxh4lhp1+w/SjKooBNBqz/0FvnO8nrfu5R+ELNh gAhQ== X-Gm-Message-State: APjAAAX2yzg9+9wjYPhe7HV09AKy7srWa7UqHykM/MTtDjknr7UuDEGP LlTY+WItVQpQ4QHhwjPFrKE= X-Google-Smtp-Source: APXvYqzQPIYoNRubdZIOtSxTDDzyPgcMaQ5zki3KNapO18w6JwMFrcpCjaVO/4MzoXfe6L31Al4dig== X-Received: by 2002:a65:6859:: with SMTP id q25mr22221333pgt.181.1564958986332; Sun, 04 Aug 2019 15:49:46 -0700 (PDT) From: john.hubbard@gmail.com X-Google-Original-From: jhubbard@nvidia.com To: Andrew Morton Date: Sun, 4 Aug 2019 15:48:58 -0700 Message-Id: <20190804224915.28669-18-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 17/34] vfio: 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, Alex Williamson , 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, 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, 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: Alex Williamson Cc: kvm@vger.kernel.org Signed-off-by: John Hubbard --- drivers/vfio/vfio_iommu_type1.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/vfio/vfio_iommu_type1.c b/drivers/vfio/vfio_iommu_type= 1.c index 054391f30fa8..5a5461a14299 100644 --- a/drivers/vfio/vfio_iommu_type1.c +++ b/drivers/vfio/vfio_iommu_type1.c @@ -320,9 +320,9 @@ static int put_pfn(unsigned long pfn, int prot) { if (!is_invalid_reserved_pfn(pfn)) { struct page *page =3D pfn_to_page(pfn); - if (prot & IOMMU_WRITE) - SetPageDirty(page); - put_page(page); + bool dirty =3D prot & IOMMU_WRITE; + + put_user_pages_dirty_lock(&page, 1, dirty); return 1; } return 0; @@ -356,7 +356,7 @@ static int vaddr_get_pfn(struct mm_struct *mm, unsigned= long vaddr, */ if (ret > 0 && vma_is_fsdax(vmas[0])) { ret =3D -EOPNOTSUPP; - put_page(page[0]); + put_user_page(page[0]); } } up_read(&mm->mmap_sem); --=20 2.22.0 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel