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GET /api/1.2/patches/2234825/?format=api
{ "id": 2234825, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2234825/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260508043543.217179-22-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": "<20260508043543.217179-22-kwilczynski@kernel.org>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260508043543.217179-22-kwilczynski@kernel.org/", "date": "2026-05-08T04:35:40", "name": "[v7,21/24] PCI/sysfs: Add __weak pci_legacy_has_sparse() helper", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "52a3dc2f5995f083ef026d4e471564dc3553239a", "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/20260508043543.217179-22-kwilczynski@kernel.org/mbox/", "series": [ { "id": 503322, "url": "http://patchwork.ozlabs.org/api/1.2/series/503322/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=503322", "date": "2026-05-08T04:35:20", "name": "PCI: Convert all dynamic sysfs attributes to static", "version": 7, "mbox": "http://patchwork.ozlabs.org/series/503322/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2234825/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2234825/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-20605-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=gojkxWSs;\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=1778215025;\n\tbh=dvrWWiezWy8a25eOYZ7kT3ZuDPygnOIs6x7THQzp8XQ=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=gojkxWSsjs4HHq9Sz1NSR2O576qHSQJY9wjQgo3bfowHdAoHZaa2OE4OAIT5iyLuP\n\t 1VpquJbvclXBjRHzxZVoiaJSQm2KwI5VPFtECPmugIzmuvpF01L1CdZ1Yjr+cEJVC3\n\t Ak226U0ylzCooHHs2Q9NZp3EfiQYOOGqhd63jMVXMSq71IBWsjMVr+Wq9sjwozh97L\n\t QxTwsxqawiRzUVwLTbNnwDEOqzjD2/st35DFOcvcz+br+7wpfW5xaoSw4uBOuLmCxM\n\t BqUa22aGeF+PkSv+tOokpEGR+dM9F5rxgNRml1vbS7Jb+3HweCOElZNafhXQPdmZh+\n\t Iuvqb+63kgpMQ==", "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 Alex Williamson <alex@shazbot.org>, Magnus Lindholm <linmag7@gmail.com>,\n 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 v7 21/24] PCI/sysfs: Add __weak pci_legacy_has_sparse() helper", "Date": "Fri, 8 May 2026 04:35:40 +0000", "Message-ID": "<20260508043543.217179-22-kwilczynski@kernel.org>", "X-Mailer": "git-send-email 2.54.0", "In-Reply-To": "<20260508043543.217179-1-kwilczynski@kernel.org>", "References": "<20260508043543.217179-1-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=-0.6 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\nTested-by: Shivaprasad G Bhat <sbhat@linux.ibm.com>\nSigned-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>\n---\n arch/alpha/include/asm/pci.h | 2 ++\n arch/alpha/kernel/pci-sysfs.c | 7 +++++++\n drivers/pci/pci-sysfs.c | 6 ++++++\n drivers/pci/pci.h | 4 ++++\n 4 files changed, 19 insertions(+)", "diff": "diff --git a/arch/alpha/include/asm/pci.h b/arch/alpha/include/asm/pci.h\nindex ef19295f2e33..95de7ffd59e8 100644\n--- a/arch/alpha/include/asm/pci.h\n+++ b/arch/alpha/include/asm/pci.h\n@@ -86,6 +86,8 @@ extern int pci_mmap_legacy_page_range(struct pci_bus *bus,\n \t\t\t\t enum pci_mmap_state mmap_state);\n extern void pci_adjust_legacy_attr(struct pci_bus *bus,\n \t\t\t\t enum pci_mmap_state mmap_type);\n+extern bool pci_legacy_has_sparse(struct pci_bus *bus,\n+\t\t\t\t enum pci_mmap_state type);\n #define HAVE_PCI_LEGACY\t1\n \n extern const struct attribute_group pci_dev_resource_attr_group;\ndiff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c\nindex 89329910b890..2d46502ba09b 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -185,6 +185,13 @@ 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 7ba12b2abe48..1e6786463e4e 100644\n--- a/drivers/pci/pci-sysfs.c\n+++ b/drivers/pci/pci-sysfs.c\n@@ -983,6 +983,12 @@ 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 71a1fde1e505..c64c7f5f0bcf 100644\n--- a/drivers/pci/pci.h\n+++ b/drivers/pci/pci.h\n@@ -392,6 +392,10 @@ 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": [ "v7", "21/24" ] }