{"id":2226503,"url":"http://patchwork.ozlabs.org/api/1.2/patches/2226503/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/patch/a20d6541e72625a3e244a737a7c94e59a7193859.1776866921.git.bblock@linux.ibm.com/","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.2/projects/28/?format=json","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":"","list_archive_url":null,"date":"2026-04-22T14:22:12","name":"[v3,2/3] PCI: Provide lock guard for pci_rescan_remove_lock","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"b9d059fcd4a371e1c21b4909c8c713a9d0327488","submitter":{"id":91674,"url":"http://patchwork.ozlabs.org/api/1.2/people/91674/?format=json","name":"Benjamin Block","email":"bblock@linux.ibm.com"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pci/patch/a20d6541e72625a3e244a737a7c94e59a7193859.1776866921.git.bblock@linux.ibm.com/mbox/","series":[{"id":501019,"url":"http://patchwork.ozlabs.org/api/1.2/series/501019/?format=json","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/2226503/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2226503/checks/","tags":{},"related":[],"headers":{"Return-Path":"\n ","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=CETo7I6k;\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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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=U7PquSzLk0\n\t46oRsJNtAhBNjD2BGpHFpbkUiQcZTx0Ng=; b=CETo7I6knvkCXhV02KOYyPlPL5\n\tOISZ3x6WJErR8YmaK53E6R4tn0IPHeF7NKrgUlS0hWDzGkqIVPK2H3SUOLx6ZiRV\n\t5NAs8gfWi8eQ7H/6+BLMP7Z0JbbTOTLll7k17x/qOWT4ciK7NsA6E1cuN3zRsiGi\n\tlg7w3VLbCmTL/DIHrW8WoYYOkgQ17WhcrOXheQ5aANkZUWVDh8qsGH+k59oklAQ3\n\taWzhBw11m0xJ0MZuDA48ilVPLfdyGNWq6IBcrsAq9VksTK3GpWiVlCg7SigEwcTf\n\tcotl8alUCqjG7jc1nmcgB68AsJJLklSMkHiVdzXBKgCzzD1leeocstK7PaNA==","From":"Benjamin Block ","To":"Bjorn Helgaas ","Cc":"Ionut Nechita ,\n Tobias Schumacher ,\n linux-pci ,\n Gerd Bayer , Vasily Gorbik ,\n Christian Borntraeger ,\n Niklas Schnelle ,\n Sven Schnelle ,\n linux-kernel ,\n Ionut Nechita ,\n Heiko Carstens , Farhan Ali ,\n linux-s390 ,\n Alexander Gordeev ,\n Andreas Krebbel ,\n Matthew Rosato ,\n Julian Ruess ,\n Benjamin Block ","Subject":"[PATCH v3 2/3] PCI: Provide lock guard for pci_rescan_remove_lock","Date":"Wed, 22 Apr 2026 16:22:12 +0200","Message-ID":"\n ","X-Mailer":"git-send-email 2.54.0","In-Reply-To":"","References":"","Precedence":"bulk","X-Mailing-List":"linux-pci@vger.kernel.org","List-Id":"","List-Subscribe":"","List-Unsubscribe":"","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 ","X-TM-AS-GCONF":"00","X-Proofpoint-Reinject":"loops=2 maxloops=12","X-Proofpoint-Spam-Details-Enc":"AW1haW4tMjYwNDIyMDEzOCBTYWx0ZWRfX1dho74nZVb5+\n 0bKnBhzO2PiQKaCe9g02REXc6wLVEzpEL/g2tV00Owaq2uQMViOa9Gw38fm8rF95g6d7TDX7Fjy\n TziXqmQPu7MmqsYw+3BgLgv7DY59hLT9ngPXs5m2XZDRXy+5ksUyzgPttoPdnUVAaxE7Q3W2eKs\n hnzqARONizbPNFpQkPGXbpOLFFCWu3DqiH61WbhD7VV6LrW+cYCC2B8r9GEwd2dDYzRTIkQawoV\n A+JTBwtgCD3ou7GR9yyaJ8TUQ4pmBDX85l/jSG2e+P9J0HNki1bvGPvwa44uuF4GNNUKf/e6S8M\n Iz1Oja2ETgtEbbCeMEwVcuga9zqhIGLt1b2uFZ3YUAHnKvoI+LvwCdKP0YT+TzkJXtIzfm9GeJ0\n 2ZKWxMbmAswAWH6jKZ5W6AI103scTi7X16CTCLzFde+hfI4Aqu3Fvd5xZ68pB+opnUv6Swy+zm+\n ZhN3p6w86HdFRYyeBPA==","X-Proofpoint-ORIG-GUID":"kyxKZNpbTLuGkc8Vq0XRm2DUdcC-dJ1f","X-Proofpoint-GUID":"ZshJOuVGDdKPQJBPIJu-98Le92IiQCEv","X-Authority-Analysis":"v=2.4 cv=BYfoFLt2 c=1 sm=1 tr=0 ts=69e8d99a cx=c_pps\n a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17\n a=A5OVakUREuEA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22\n a=RzCfie-kr_QcCd8fBx8p:22 a=VnNF1IyMAAAA:8 a=qAR2Z3AMSIpdRBh0OscA: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 priorityscore=1501 impostorscore=0 malwarescore=0 suspectscore=0\n lowpriorityscore=0 adultscore=0 spamscore=0 clxscore=1015 bulkscore=0\n phishscore=0 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":"Make it possible to use guard() or scoped_guard() to lock, and\nautomatically unlock `pci_rescan_remove_lock`.\n\nSince the actual mutex `pci_rescan_remove_lock` is always supposed to be\ntaken and released using the functions pci_lock_rescan_remove() and\npci_unlock_rescan_remove() it is not possible to simply use the already\nexisting guards for `struct mutex`. Instead define a new guard\n`pci_rescan_remove` that will also call the functions in question, but\nis usable via guard() or scoped_guard().\n\nReviewed-by: Niklas Schnelle \nSigned-off-by: Benjamin Block \n---\n include/linux/pci.h | 3 +++\n 1 file changed, 3 insertions(+)","diff":"diff --git a/include/linux/pci.h b/include/linux/pci.h\nindex fd7a962a64ef..4c41b5a2c90a 100644\n--- a/include/linux/pci.h\n+++ b/include/linux/pci.h\n@@ -41,6 +41,7 @@\n #include \n #include \n #include \n+#include \n \n #include \n \n@@ -1537,6 +1538,8 @@ 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+DEFINE_LOCK_GUARD_0(pci_rescan_remove, pci_lock_rescan_remove(),\n+\t\t pci_unlock_rescan_remove());\n \n /* Vital Product Data routines */\n ssize_t pci_read_vpd(struct pci_dev *dev, loff_t pos, size_t count, void *buf);\n","prefixes":["v3","2/3"]}