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GET /api/1.2/patches/2226502/?format=api
{ "id": 2226502, "url": "http://patchwork.ozlabs.org/api/1.2/patches/2226502/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/3686615aaecef10c38f6a91f39742412d05bb0f6.1776866921.git.bblock@linux.ibm.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/1.2/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, "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<3686615aaecef10c38f6a91f39742412d05bb0f6.1776866921.git.bblock@linux.ibm.com>", "list_archive_url": null, "date": "2026-04-22T14:22:11", "name": "[v3,1/3] 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/1.2/people/91674/?format=api", "name": "Benjamin Block", "email": "bblock@linux.ibm.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/3686615aaecef10c38f6a91f39742412d05bb0f6.1776866921.git.bblock@linux.ibm.com/mbox/", "series": [ { "id": 501019, "url": "http://patchwork.ozlabs.org/api/1.2/series/501019/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=501019", "date": "2026-04-22T14:22:11", "name": "PCI: s390/pci: Fix deadlocks on s390 when releasing zPCI-bus or -device objects", "version": 3, "mbox": "http://patchwork.ozlabs.org/series/501019/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2226502/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2226502/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-52973-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=eECP0Bj4;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.105.105.114; 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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=eECP0Bj4e0Euk5POsppJ3fMUXA\n\ty8RFQSStie2S/3LD8b05lcugWAKFFpi0C67u8a5x5qwwa4vWH/hjXauyMyHz4hdI\n\tEHE+4kHy8wQQaV68gGE40475PjA2Xko5WFZ8OGLx44Dph+J6M3y5g3iNOdPABVA5\n\tTd/UC2lx3aSNlDQMVP42i/rFYs/FuaKpftXz6Hd+ZO1en9vdRQO3ONX95JA7/Off\n\tiDbENrJSxtVcHGZRuJvtfVlcQ/9PeYUpCywuwP2ij6oQkwT6O5wHN8V/boIRVOQ0\n\t/NydH+5R4e1MG7B/hNhcV8mxX0Qdb83Jda8/z9PsVsSK1/jxl4tR86ZCIL5w==", "From": "Benjamin Block <bblock@linux.ibm.com>", "To": "Bjorn Helgaas <bhelgaas@google.com>", "Cc": "Ionut Nechita <ionut.nechita@windriver.com>,\n Tobias Schumacher <ts@linux.ibm.com>,\n linux-pci <linux-pci@vger.kernel.org>,\n Gerd Bayer <gbayer@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>,\n Christian Borntraeger <borntraeger@linux.ibm.com>,\n Niklas Schnelle <schnelle@linux.ibm.com>,\n Sven Schnelle <svens@linux.ibm.com>,\n linux-kernel <linux-kernel@vger.kernel.org>,\n Ionut Nechita <ionut_n2001@yahoo.com>,\n Heiko Carstens <hca@linux.ibm.com>, Farhan Ali <alifm@linux.ibm.com>,\n linux-s390 <linux-s390@vger.kernel.org>,\n Alexander Gordeev <agordeev@linux.ibm.com>,\n Andreas Krebbel <krebbel@linux.ibm.com>,\n Matthew Rosato <mjrosato@linux.ibm.com>,\n Julian Ruess <julianr@linux.ibm.com>,\n Benjamin Block <bblock@linux.ibm.com>", "Subject": "[PATCH v3 1/3] PCI: Move declaration of pci_rescan_remove_lock into\n public pci.h", "Date": "Wed, 22 Apr 2026 16:22:11 +0200", "Message-ID": "\n <3686615aaecef10c38f6a91f39742412d05bb0f6.1776866921.git.bblock@linux.ibm.com>", "X-Mailer": "git-send-email 2.54.0", "In-Reply-To": "<cover.1776866921.git.bblock@linux.ibm.com>", "References": "<cover.1776866921.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-GUID": "g8VGT8nT7JX1-CuTkSOq4kTXeOGBwLF3", "X-Proofpoint-Spam-Details-Enc": "AW1haW4tMjYwNDIyMDEzOCBTYWx0ZWRfX6AGCsAzBkvnn\n bXOglQ7IwtbVBSe/v6Wcq1JPb+vyY6fgQdWnPq5nMccutO9C8QE8sQC8Qc9LanyepwgGhugSa+o\n YybfxEamerwDBJ0S4veCaEIac79fu/F5XQVqhKOkwzeSMMLBhOzytNjZTqbEuF+zqBt6zQOSLh+\n TQtwtGSc6P/fp/aHuX/fKHLvSzzGvTUAuqohrRYhaDh6RHX+oU52oBtqGiskI02Li2E7iZ93Suz\n T6f9+4VzDFxVZylUKozPQ4IUmVsxyfw2LXwe/yVLpQf53RiN8cMq5/LCx4+3htdjw8vA9KnvnBF\n TkCiPS68dc2lPDVdkgz/auyBId7LlaFm95PtW315tKYGH87o40e6n8fMNdKB6tcAdS3jWuFkLo3\n D5VuOlbWMw1XPEd9gpsLQByI5IF68mB1ZUTph6xlLI+fJ46bBKi3EqyUidGp49Ac0GVHeiVmpwh\n fI7yeMlAMWp315OjCoA==", "X-Authority-Analysis": "v=2.4 cv=a6kAM0SF c=1 sm=1 tr=0 ts=69e8d99a cx=c_pps\n a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=V8glGbnc2Ofi9Qvn3v5h:22 a=VnNF1IyMAAAA:8 a=vf2HUNMP9xvVswJDcwYA:9", "X-Proofpoint-ORIG-GUID": "2ueOtlWB3NuzUbPeaYjju9Pay1TykOVH", "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 suspectscore=0 spamscore=0 adultscore=0 bulkscore=0\n lowpriorityscore=0 impostorscore=0 clxscore=1015 phishscore=0\n priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc=\n route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000\n 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": [ "v3", "1/3" ] }