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GET /api/1.2/patches/2221721/?format=api
{ "id": 2221721, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2221721/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260410055040.39233-19-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": "<20260410055040.39233-19-kwilczynski@kernel.org>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260410055040.39233-19-kwilczynski@kernel.org/", "date": "2026-04-10T05:50:38", "name": "[18/20] PCI/sysfs: Add __weak pci_legacy_has_sparse() helper", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "5ed9c7e6b3ace0e80ed6b9ee1dc2d0784e311679", "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/20260410055040.39233-19-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/2221721/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2221721/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19550-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=idNrnZGK;\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=1775800310;\n\tbh=oQgIbc3awQh5fpb2CqNNM9x6RSDapGc3MWBpJJrWA7E=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=idNrnZGKoasnD+B1n6MQ4w55cpcbgnyBAaSbeyxgoqaEf9peMLrM99g7hbTJTahvx\n\t RPGuG1UNYkXbtttYpaE75RjqXuyb2pDPR1VMWk1U1OrtGjHHvKX4EPLinekes/d7vk\n\t bN46bFvKC5+DQQzRpB/ufCE4vD6TRb9VjEiIHPMyQ0z0kq8+2GzVzIDmINommzG9ow\n\t qyNlHpAMWYY4+QqnBUvBglUeE0z2v+iKqL98oyXZYUsDxikE5IemvqgnUbEtwGyJzB\n\t KTh7H61KNCjotmjDPR5DBjp75RYdJ84VeWLcUFJFRMxAwxP2/MrQUIQiKn64YXQvUU\n\t XpMjiHJAGvHlA==", "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 18/20] PCI/sysfs: Add __weak pci_legacy_has_sparse() helper", "Date": "Fri, 10 Apr 2026 05:50:38 +0000", "Message-ID": "<20260410055040.39233-19-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, Alpha's sparse/dense legacy attribute handling is done via\npci_adjust_legacy_attr(), which updates dynamically allocated attributes\nat runtime. The upcoming conversion to static attributes needs a way\nto determine sparse support at visibility check time.\n\nAdd a __weak pci_legacy_has_sparse() that returns false by default.\nAlpha overrides it to check has_sparse() on the bus host controller.\n\nSigned-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>\n---\n arch/alpha/kernel/pci-sysfs.c | 7 +++++++\n drivers/pci/pci-sysfs.c | 6 ++++++\n drivers/pci/pci.h | 4 ++++\n 3 files changed, 17 insertions(+)", "diff": "diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c\nindex 2da95d965e9c..2031a3b6972c 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -190,6 +190,13 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus, struct vm_area_struct *vma,\n \treturn hose_mmap_page_range(hose, vma, mmap_type, sparse);\n }\n \n+bool pci_legacy_has_sparse(struct pci_bus *bus, enum pci_mmap_state type)\n+{\n+\tstruct pci_controller *hose = bus->sysdata;\n+\n+\treturn has_sparse(hose, type);\n+}\n+\n /**\n * pci_adjust_legacy_attr - adjustment of legacy file attributes\n * @bus: bus to create files under\ndiff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c\nindex 40b5e21d77f3..fe079fb31dce 100644\n--- a/drivers/pci/pci-sysfs.c\n+++ b/drivers/pci/pci-sysfs.c\n@@ -1019,6 +1019,12 @@ static int pci_mmap_legacy_io(struct file *filp, struct kobject *kobj,\n \treturn pci_mmap_legacy_page_range(bus, vma, pci_mmap_io);\n }\n \n+bool __weak pci_legacy_has_sparse(struct pci_bus *bus,\n+\t\t\t\t enum pci_mmap_state type)\n+{\n+\treturn false;\n+}\n+\n /**\n * pci_adjust_legacy_attr - adjustment of legacy file attributes\n * @b: bus to create files under\ndiff --git a/drivers/pci/pci.h b/drivers/pci/pci.h\nindex 1bf165595583..f52caf7e4d13 100644\n--- a/drivers/pci/pci.h\n+++ b/drivers/pci/pci.h\n@@ -390,6 +390,10 @@ static inline int pci_no_d1d2(struct pci_dev *dev)\n \n }\n \n+#ifdef HAVE_PCI_LEGACY\n+bool pci_legacy_has_sparse(struct pci_bus *bus, enum pci_mmap_state type);\n+#endif\n+\n #ifdef CONFIG_SYSFS\n extern const struct attribute_group *pci_dev_groups[];\n extern const struct attribute_group *pci_dev_attr_groups[];\n", "prefixes": [ "18/20" ] }