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GET /api/1.1/patches/2226524/?format=api
{ "id": 2226524, "url": "http://patchwork.ozlabs.org/api/1.1/patches/2226524/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/c6bf51eafa3af2392f4f1462c7c2791ca19d13e6.1776868550.git.bblock@linux.ibm.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.1/projects/28/?format=api", "name": "Linux PCI development", "link_name": "linux-pci", "list_id": "linux-pci.vger.kernel.org", "list_email": "linux-pci@vger.kernel.org", "web_url": null, "scm_url": null, "webscm_url": null }, "msgid": "<c6bf51eafa3af2392f4f1462c7c2791ca19d13e6.1776868550.git.bblock@linux.ibm.com>", "date": "2026-04-22T14:37:42", "name": "[v4,1/3] PCI: Move declaration of pci_rescan_remove_lock into public pci.h", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "ab79cfd6b8b601fad1ef9c9386237dac6d5d5ce5", "submitter": { "id": 91674, "url": "http://patchwork.ozlabs.org/api/1.1/people/91674/?format=api", "name": "Benjamin Block", "email": "bblock@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/c6bf51eafa3af2392f4f1462c7c2791ca19d13e6.1776868550.git.bblock@linux.ibm.com/mbox/", "series": [ { "id": 501022, "url": "http://patchwork.ozlabs.org/api/1.1/series/501022/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=501022", "date": "2026-04-22T14:37:42", "name": "PCI: s390/pci: Fix deadlocks on s390 when releasing zPCI-bus or -device objects", "version": 4, "mbox": "http://patchwork.ozlabs.org/series/501022/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226524/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226524/checks/", "tags": {}, "headers": { "Return-Path": "\n <linux-pci+bounces-52979-incoming=patchwork.ozlabs.org@vger.kernel.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linux-pci@vger.kernel.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=ibm.com header.i=@ibm.com header.a=rsa-sha256\n header.s=pp1 header.b=gT8ajzhc;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c15:e001:75::12fc:5321; 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a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116;\n\tt=1776868672; cv=none;\n b=tYqyC7nUO65eLYEy3dfWG/ndYs9ZoteX1/v0+5heO8roAyGKx38W3kBUJFfYSIoE+DfDQRs/WZwmT1rsM2laXb/dW2tyZZAd4eLT9WDnDR6su/7YOCudXSHbkuL0IW2clcGBk721xUtAzHj+oZNjqdq7HkAfQaWDA9wQvZfbAjE=", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=subspace.kernel.org;\n\ts=arc-20240116; t=1776868672; c=relaxed/simple;\n\tbh=AOgrJvt8eAQd3uhRUBWWqieBYQQirzu5sfsd07wnJ0s=;\n\th=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version;\n b=KXBHhwe/5rCvlKdDSrvRdu0LvROz8q059j65a5wMCDc35YPB/ZFKgZx/mESyZs+izbnIByUDa+T9m0RbEPzRvH1iEc+rBmqqL/QCXlOjD+rq0TeLbNS5Q+qpxf+JyGRjDUz1S/xwvZiTsy7e2a5dom0SL1VTvnhA91kOeYtBnTw=", "ARC-Authentication-Results": "i=1; smtp.subspace.kernel.org;\n dmarc=pass (p=none dis=none) header.from=linux.ibm.com;\n spf=pass smtp.mailfrom=linux.ibm.com;\n dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com\n header.b=gT8ajzhc; arc=none smtp.client-ip=148.163.156.1", "DKIM-Signature": "v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc\n\t:content-transfer-encoding:date:from:in-reply-to:message-id\n\t:mime-version:references:sender:subject:to; s=pp1; bh=/B8iiDzQPv\n\tdivl/buJcKUq4lAcbq+Yp2V/5n/G8nloU=; b=gT8ajzhcIXV63I6QId/GAUG7td\n\thcN6veZQJ2w8v+dJGkL8t7REsYA/G20xMbikpX0KtmDNMIkRpiVz44D1nAyC+kcY\n\tfjhEhoc8yaJZWRWjtR3jlOLvVQ4c4ZzHwSg/iMVMNvKhUFc80FYPEZvAWXLW4dlf\n\tEvgbdC0DmbFtITGQ2+hc5oDljNT3vWXiCE8Sx4qWC8wbtFe/u0MJJ8brGsr1j2oN\n\tnCF+WJdegY2IMnZEvVcYlaXs0+KmhS9u23/D1mSxza4ApILsoVN+jbRDmO3t8F54\n\tYUgp0xEQs5PnbKwhHNTDPj2t+Z8/H3TBCbdKMI+w8kN+DLFh2tHY8W+vsaJA==", "From": "Benjamin Block <bblock@linux.ibm.com>", "To": "Bjorn Helgaas <bhelgaas@google.com>", "Cc": "Niklas Schnelle <schnelle@linux.ibm.com>,\n Tobias Schumacher <ts@linux.ibm.com>,\n linux-s390 <linux-s390@vger.kernel.org>,\n Heiko Carstens <hca@linux.ibm.com>,\n Ionut Nechita <ionut_n2001@yahoo.com>,\n Sven Schnelle <svens@linux.ibm.com>,\n Ionut Nechita <ionut.nechita@windriver.com>,\n Farhan Ali <alifm@linux.ibm.com>,\n Alexander Gordeev <agordeev@linux.ibm.com>,\n Julian Ruess <julianr@linux.ibm.com>,\n Andreas Krebbel <krebbel@linux.ibm.com>,\n Gerd Bayer <gbayer@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>,\n linux-pci <linux-pci@vger.kernel.org>,\n linux-kernel <linux-kernel@vger.kernel.org>,\n Christian Borntraeger <borntraeger@linux.ibm.com>,\n Matthew Rosato <mjrosato@linux.ibm.com>,\n Benjamin Block <bblock@linux.ibm.com>", "Subject": "[PATCH v4 1/3] PCI: Move declaration of pci_rescan_remove_lock into\n public pci.h", "Date": "Wed, 22 Apr 2026 16:37:42 +0200", "Message-ID": "\n <c6bf51eafa3af2392f4f1462c7c2791ca19d13e6.1776868550.git.bblock@linux.ibm.com>", "X-Mailer": "git-send-email 2.54.0", "In-Reply-To": "<cover.1776868550.git.bblock@linux.ibm.com>", "References": "<cover.1776868550.git.bblock@linux.ibm.com>", "Precedence": "bulk", "X-Mailing-List": "linux-pci@vger.kernel.org", "List-Id": "<linux-pci.vger.kernel.org>", "List-Subscribe": "<mailto:linux-pci+subscribe@vger.kernel.org>", "List-Unsubscribe": "<mailto:linux-pci+unsubscribe@vger.kernel.org>", "MIME-Version": "1.0", "Organization": "=?unknown-8bit?q?IBM_Deutschland_Research_=26_Development_GmbH?=\n\t=?unknown-8bit?q?=2C_https=3A//www=2Eibm=2Ecom/privacy=2C_Vors=2E_Aufs=2E-R?=\n\t=?unknown-8bit?q?=2E=3A_Wolfgang_Wendt=2C_Gesch=C3=A4ftsf=C3=BChrung=3A_Dav?=\n\t=?unknown-8bit?q?id_Faller=2E_Sitz_der_Ges=2E=3A_Ehningen=2C_Registergerich?=\n\t=?unknown-8bit?q?t=3A_AmtsG_Stuttgart=2C_HRB_243294?=", "Content-Transfer-Encoding": "8bit", "Sender": "Benjamin Block <bblock@linux.ibm.com>", "X-TM-AS-GCONF": "00", "X-Proofpoint-Reinject": "loops=2 maxloops=12", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDIyMDEzOCBTYWx0ZWRfX5qAqdt7TsJbt\n SnthpVsCTErylbLQ3cvko54l0CPQcYrmAj1zagJYQj7m7oChuQQ9WmPZPDaqXTSx7b/zEGYWBOG\n YAwU9vSqGJ7cPhG+Q+0miZOkMOvzXZUStixxjxIN95eXfvET2Nps+3R+rVoRjc+Zm+dWgAQv0/L\n sjrmqsPIkBJmU4nL/krc86vUEmm0kzFIuOjwSDufF1u8329DPpWyFlpQIOeJmrPyREwSdCBejar\n /rxv81sApB6/W2Rv7ByzpT3a1k1LjRzPjezTK3uyeMH473qoV1gxmgpljjQvdOH4coC5yO9jn2X\n 9+NzfCKmGPgE2oD9q0xKfoQ1jl3sURjcghncFMxLonEefWaXrsQXhuUdlhjxCLKEnFtaZXmz/R8\n QPoqyAX2GHYfc1su/OquEZDACbe7mA5xO2yyb5w+XipjJ/EkHCxb4J+WGVsMZRH7EQ5fEd3JSTZ\n /0Ea+Rt1nPUjtVpYc4A==", "X-Proofpoint-ORIG-GUID": "i-apgRMqPvEPmC_aFkQ9NZi3pKgMWL2S", "X-Proofpoint-GUID": "n2fVAIjDJtn3MAwfgLwj3_nZYVdYXHv7", "X-Authority-Analysis": "v=2.4 cv=XMUAjwhE c=1 sm=1 tr=0 ts=69e8dd3e cx=c_pps\n a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=vf2HUNMP9xvVswJDcwYA:9", "X-Proofpoint-Virus-Version": "vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-04-22_01,2026-04-21_02,2025-10-01_01", "X-Proofpoint-Spam-Details": "rule=outbound_notspam policy=outbound score=0\n malwarescore=0 clxscore=1015 priorityscore=1501 impostorscore=0 bulkscore=0\n spamscore=0 lowpriorityscore=0 phishscore=0 adultscore=0 suspectscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2604220138" }, "content": "So far it is possible to use and call the functions\npci_lock_rescan_remove() and pci_unlock_rescan_remove() from any PCI\ncode, including modules and architecture code; but the lock variable\n`pci_rescan_remove_lock` itself is private to objects residing in\n`drivers/pci/` via the header `drivers/pci/pci.h`.\n\nThis makes it possible to use the lock - lock it, unlock it - from\nanywhere, but it is not possible to use lockdep annotations such as\nlockdep_assert_held(), or sparse annotations such as __must_hold() in\nmodules or architecture code for PCI to make the usage more safe.\n\nSince it is useful for `pci_rescan_remove_lock` to have such\nannotations, move the variable declaration into `include/linux/pci.h`.\n\nReviewed-by: Niklas Schnelle <schnelle@linux.ibm.com>\nSigned-off-by: Benjamin Block <bblock@linux.ibm.com>\n---\n drivers/pci/pci.h | 2 --\n drivers/pci/probe.c | 1 +\n include/linux/pci.h | 2 ++\n 3 files changed, 3 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h\nindex 13d998fbacce..6d611523420f 100644\n--- a/drivers/pci/pci.h\n+++ b/drivers/pci/pci.h\n@@ -110,8 +110,6 @@ struct pcie_tlp_log;\n extern const unsigned char pcie_link_speed[];\n extern bool pci_early_dump;\n \n-extern struct mutex pci_rescan_remove_lock;\n-\n bool pcie_cap_has_lnkctl(const struct pci_dev *dev);\n bool pcie_cap_has_lnkctl2(const struct pci_dev *dev);\n bool pcie_cap_has_rtctl(const struct pci_dev *dev);\ndiff --git a/drivers/pci/probe.c b/drivers/pci/probe.c\nindex 850a63c175f0..81a7db71ebc3 100644\n--- a/drivers/pci/probe.c\n+++ b/drivers/pci/probe.c\n@@ -3509,6 +3509,7 @@ EXPORT_SYMBOL_GPL(pci_rescan_bus);\n * routines should always be executed under this mutex.\n */\n DEFINE_MUTEX(pci_rescan_remove_lock);\n+EXPORT_SYMBOL_GPL(pci_rescan_remove_lock);\n static const struct task_struct *pci_rescan_remove_owner;\n static unsigned int pci_rescan_remove_depth;\n \ndiff --git a/include/linux/pci.h b/include/linux/pci.h\nindex 1c270f1d5123..fd7a962a64ef 100644\n--- a/include/linux/pci.h\n+++ b/include/linux/pci.h\n@@ -39,6 +39,7 @@\n #include <linux/io.h>\n #include <linux/resource_ext.h>\n #include <linux/msi_api.h>\n+#include <linux/mutex.h>\n #include <uapi/linux/pci.h>\n \n #include <linux/pci_ids.h>\n@@ -1533,6 +1534,7 @@ void set_pcie_hotplug_bridge(struct pci_dev *pdev);\n \n /* Functions for PCI Hotplug drivers to use */\n unsigned int pci_rescan_bus(struct pci_bus *bus);\n+extern struct mutex pci_rescan_remove_lock;\n void pci_lock_rescan_remove(void);\n void pci_unlock_rescan_remove(void);\n \n", "prefixes": [ "v4", "1/3" ] }