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GET /api/patches/2224072/?format=api
{ "id": 2224072, "url": "http://patchwork.ozlabs.org/api/patches/2224072/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260416180107.777065-13-kwilczynski@kernel.org/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/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": "<20260416180107.777065-13-kwilczynski@kernel.org>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260416180107.777065-13-kwilczynski@kernel.org/", "date": "2026-04-16T18:00:56", "name": "[v5,12/23] alpha/PCI: Use BAR index in sysfs attr->private instead of resource pointer", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "77620b44cfe2a7851f97f1972d3a4c3e65ba0c64", "submitter": { "id": 86709, "url": "http://patchwork.ozlabs.org/api/people/86709/?format=api", "name": "Krzysztof Wilczyński", "email": "kwilczynski@kernel.org" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260416180107.777065-13-kwilczynski@kernel.org/mbox/", "series": [ { "id": 500194, "url": "http://patchwork.ozlabs.org/api/series/500194/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=500194", "date": "2026-04-16T18:00:44", "name": "PCI: Convert all dynamic sysfs attributes to static", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/500194/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2224072/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2224072/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19803-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=OiGTWIqp;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=112.213.38.117; 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a=rsa-sha256; c=relaxed/simple; d=kernel.org;\n\ts=k20201202; t=1776362514;\n\tbh=LSXfSjgBz15fSxwbvqqVboBWJc4CbgupbkaWY3yx6kA=;\n\th=From:To:Cc:Subject:Date:In-Reply-To:References:From;\n\tb=OiGTWIqpmv4YGnWuufZIAg9U6Mv3LXjBtSjahu2SURo0/CKF7KTFO1fzqBRV1muaM\n\t WEm/ZZZDlGzSivb66L9p0h/cU4SVd/le0juBJhskNSGPxhe7yLWQTdweFqSuajcIl1\n\t HDwLhSOXK2CJsAyMYvb+X9CJ5yzMLkUt7dPmhE9um67LS2KOffaArsYp+cFLt1t0h6\n\t Sn26D9YUYUOpOfxmuQp4YoobCYPeJIl6Iq3LUvUVy8cwVk4NHSFpgbWLU6PnCwfHcX\n\t qsW6tiii16rqzpUz8zXPbxC73G7J56SDc76vcM3JK/loOeeD5qgpMTl7ixb7PjcUSr\n\t d36CWK6ktDTKg==", "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 v5 12/23] alpha/PCI: Use BAR index in sysfs attr->private\n instead of resource pointer", "Date": "Thu, 16 Apr 2026 18:00:56 +0000", "Message-ID": "<20260416180107.777065-13-kwilczynski@kernel.org>", "X-Mailer": "git-send-email 2.53.0", "In-Reply-To": "<20260416180107.777065-1-kwilczynski@kernel.org>", "References": "<20260416180107.777065-1-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 pci_create_one_attr() stores a resource pointer in\nattr->private, and pci_mmap_resource() loops through all BARs to find\nthe matching index.\n\nThus, store the BAR index directly in attr->private and retrieve the\nresource via pci_resource_n(). This eliminates the loop and aligns\nwith the convention used by the generic PCI sysfs code.\n\nThe PCI core change was first added in the commit dca40b186b75 (\"PCI:\nUse BAR index in sysfs attr->private instead of resource pointer\").\n\nTested-by: Magnus Lindholm <linmag7@gmail.com>\nReviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>\nAcked-by: Magnus Lindholm <linmag7@gmail.com>\nSigned-off-by: Krzysztof Wilczyński <kwilczynski@kernel.org>\n---\n arch/alpha/kernel/pci-sysfs.c | 15 +++++----------\n 1 file changed, 5 insertions(+), 10 deletions(-)", "diff": "diff --git a/arch/alpha/kernel/pci-sysfs.c b/arch/alpha/kernel/pci-sysfs.c\nindex 2324720c3e83..2330ab84d59c 100644\n--- a/arch/alpha/kernel/pci-sysfs.c\n+++ b/arch/alpha/kernel/pci-sysfs.c\n@@ -69,25 +69,20 @@ static int pci_mmap_resource(struct kobject *kobj,\n \t\t\t struct vm_area_struct *vma, int sparse)\n {\n \tstruct pci_dev *pdev = to_pci_dev(kobj_to_dev(kobj));\n-\tstruct resource *res = attr->private;\n+\tint barno = (unsigned long)attr->private;\n+\tstruct resource *res = pci_resource_n(pdev, barno);\n \tenum pci_mmap_state mmap_type;\n \tstruct pci_bus_region bar;\n-\tint i, ret;\n+\tint ret;\n \n \tret = security_locked_down(LOCKDOWN_PCI_ACCESS);\n \tif (ret)\n \t\treturn ret;\n \n-\tfor (i = 0; i < PCI_STD_NUM_BARS; i++)\n-\t\tif (res == &pdev->resource[i])\n-\t\t\tbreak;\n-\tif (i >= PCI_STD_NUM_BARS)\n-\t\treturn -ENODEV;\n-\n \tif (res->flags & IORESOURCE_MEM && iomem_is_exclusive(res->start))\n \t\treturn -EINVAL;\n \n-\tif (!__pci_mmap_fits(pdev, i, vma, sparse))\n+\tif (!__pci_mmap_fits(pdev, barno, vma, sparse))\n \t\treturn -EINVAL;\n \n \tpcibios_resource_to_bus(pdev->bus, &bar, res);\n@@ -170,7 +165,7 @@ static int pci_create_one_attr(struct pci_dev *pdev, int num, char *name,\n \tres_attr->attr.name = name;\n \tres_attr->attr.mode = S_IRUSR | S_IWUSR;\n \tres_attr->size = sparse ? size << 5 : size;\n-\tres_attr->private = &pdev->resource[num];\n+\tres_attr->private = (void *)(unsigned long)num;\n \treturn sysfs_create_bin_file(&pdev->dev.kobj, res_attr);\n }\n \n", "prefixes": [ "v5", "12/23" ] }