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GET /api/1.2/patches/2221720/?format=api
{ "id": 2221720, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2221720/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410055040.39233-18-kwilczynski@kernel.org/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/1.2/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260410055040.39233-18-kwilczynski@kernel.org>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260410055040.39233-18-kwilczynski@kernel.org/", "date": "2026-04-10T05:50:37", "name": "[17/20] alpha/PCI: Compute legacy size in pci_mmap_legacy_page_range()", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "8beb55edb48bc5648b1dedd871063e1b2f28af02", "submitter": { "id": 86709, "url": "http://patchwork.ozlabs.org/api/1.2/people/86709/?format=api", "name": "Krzysztof Wilczyński", "email": "kwilczynski@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410055040.39233-18-kwilczynski@kernel.org/mbox/", "series": [ { "id": 499413, "url": "http://patchwork.ozlabs.org/api/1.2/series/499413/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=499413", "date": "2026-04-10T05:50:20", "name": "PCI: Convert all dynamic sysfs attributes to static", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/499413/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2221720/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221720/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19549-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=L9KhOCvw;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1775800306;\n\tbh=RaLaicXdVd13BfmiGv2VaH4swf8eCOhEtaGCnbo0iIg=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=L9KhOCvwhQBtoVpNr6HLSFDBoXOpjGQuwTz5mSKRMKHFJpTYUVqBAQbaySh5U/2c6\n\t SN44v4MFI2F7H8mEXNOvh7jTGhAh50/IkSeVwCDEPIPKv20uDiusCSdfc/BSpG9QHP\n\t YBGH0h4FMkgUZxvnpLFjQSMJHnYmJyVLRfptvRgl1MvTA0xUpcLDWOQffjysbKv2uF\n\t w+8TwLGglwIBY8Us/Km9F1tr4EGd0DKquEmHy9UcAzhCSt66wVtWFKYS/0/3m59ISp\n\t AfIgqbwJDk9Wo0Aiv4q36+2MA0J24+dk5j22Lj+MFY2PXNYq/fVP/AoUdu/hVm1lCu\n\t 8bWvlMrIwMmpQ==", "From": "=?utf-8?q?Krzysztof_Wilczy=C5=84ski?= <kwilczynski@kernel.org>", "To": "Bjorn Helgaas <bhelgaas@google.com>", "Cc": "Bjorn Helgaas <helgaas@kernel.org>,\n Manivannan Sadhasivam <mani@kernel.org>,\n Lorenzo Pieralisi <lpieralisi@kernel.org>,\n Magnus Lindholm <linmag7@gmail.com>, Matt Turner <mattst88@gmail.com>,\n Richard Henderson <richard.henderson@linaro.org>,\n Christophe Leroy <chleroy@kernel.org>,\n Madhavan Srinivasan <maddy@linux.ibm.com>,\n Michael Ellerman <mpe@ellerman.id.au>, Nicholas Piggin <npiggin@gmail.com>,\n Dexuan Cui <decui@microsoft.com>,\n =?utf-8?q?Krzysztof_Ha=C5=82asa?= <khalasa@piap.pl>,\n Lukas Wunner <lukas@wunner.de>, \"Oliver O'Halloran\" <oohall@gmail.com>,\n Saurabh Singh Sengar <ssengar@microsoft.com>,\n Shuan He <heshuan@bytedance.com>, Srivatsa Bhat <srivatsabhat@microsoft.com>,\n\t=?utf-8?q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>,\n linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org,\n linuxppc-dev@lists.ozlabs.org", "Subject": "[PATCH 17/20] alpha/PCI: Compute legacy size in\n pci_mmap_legacy_page_range()", "Date": "Fri, 10 Apr 2026 05:50:37 +0000", "Message-ID": "<20260410055040.39233-18-kwilczynski@kernel.org>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260410055040.39233-1-kwilczynski@kernel.org>", "References": "<20260410055040.39233-1-kwilczynski@kernel.org>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED,\n\tDKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS\n\tautolearn=disabled version=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Currently, pci_mmap_legacy_page_range() reads the legacy resource\nsize from bus->legacy_mem->size or bus->legacy_io->size. This\ncouples the mmap bounds check to the struct pci_bus fields that\nwill be removed when legacy attributes are converted to static\ndefinitions.\n\nCompute the size directly from the known constants (0x100000 for\nmemory, 0xffff for I/O) and shift by 5 bits for sparse systems.\n\nSigned-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>\n---\n arch/alpha/kernel/pci-sysfs.c | 6 ++++--\n 1 file changed, 4 insertions(+), 2 deletions(-)", "diff": "diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c\nindex 27adfe6dbd5e..2da95d965e9c 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -180,8 +180,10 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma,\n \tint sparse = has_sparse(hose, mmap_type);\n \tunsigned long res_size;\n \n-\tres_size = (mmap_type == pci_mmap_mem) ? bus->legacy_mem->size :\n-\t\t\t\t\t\t bus->legacy_io->size;\n+\tres_size = (mmap_type == pci_mmap_mem) ? 0x100000 : 0xffff;\n+\tif (sparse)\n+\t\tres_size <<= 5;\n+\n \tif (!__legacy_mmap_fits(hose, vma, res_size, sparse))\n \t\treturn -EINVAL;\n \n", "prefixes": [ "17/20" ] }