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Peter Anvin" Cc: Yinghai Lu , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, Gerd Bayer X-Mailer: b4 0.14.3 X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: 0RQfFO6kd5Exaa6jtq8QmrD1ArL9TjLK X-Authority-Analysis: v=2.4 cv=Os5/DS/t c=1 sm=1 tr=0 ts=6a072c26 cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=A-J4sBJkw9dRCLvenqkA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: RLHuf12cEa_iVbnPUTeuyx704_HuHZBA X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDE0MyBTYWx0ZWRfX+EkxOtPg5wrF y6D79rBTGioZOtYfV7Vzb8wg4gSXWdFSHE66cMnw5FXXd4CWOwMo1wa4T7dgAdjKsk3ifdHl0/u 3BfpzTFh8GJFOBA00GHRgKoLmMWi3iCLh4txdMyd3E9wHWfJy0QOIaLyySkbhckG+Bt/qUwv85r kHNWXv9msrf1cU72WrlxXaDQoCbHraz8ls7fA2bnjpDa+ZgBXsSMjWz3iQvkX2wnWEVGvZ5rKmp wwtL5iOGCtu+RlKTAEd1CR2g/JjcSziPxAQdb0dLDN9gafYX7kfFUNUd7/fXFGmbBO2oxzdQg5U 7s5LfePraJzqA29jPExj4L+RilK/LyadcF4834TJC5O/+7/FadlTYbOqd7mXHdXG3cErFc0UZjX 5+AEpHssE4CYsFgSEYGfkDZ6YGthHFZKy6iDON38GFZvx+hUbgJ9g+lnjkPceVIuFeQ8qL0hwwH U697D83itNRMRPMw0cg== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-15_03,2026-05-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 impostorscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 malwarescore=0 priorityscore=1501 bulkscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150143 Replace iterating over pci_root_buses with the official pci_find_next_bus() call provided by PCI core. This allows to make pci_root_buses private to PCI core. Signed-off-by: Gerd Bayer --- arch/alpha/kernel/pci.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c index 11df411b1d18..02ec4dbb3ac6 100644 --- a/arch/alpha/kernel/pci.c +++ b/arch/alpha/kernel/pci.c @@ -312,9 +312,9 @@ pcibios_claim_one_bus(struct pci_bus *b) static void __init pcibios_claim_console_setup(void) { - struct pci_bus *b; + struct pci_bus *b =3D NULL; =20 - list_for_each_entry(b, &pci_root_buses, node) + while ((b =3D pci_find_next_bus(b)) !=3D NULL) pcibios_claim_one_bus(b); } =20 --=20 2.54.0 From nobody Mon May 25 08:13:35 2026 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6159A37F015; Fri, 15 May 2026 14:23:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal: i=1; 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Peter Anvin" Cc: Yinghai Lu , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, Gerd Bayer X-Mailer: b4 0.14.3 X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: aFzaU5N9Oxsa1AO5roV0iznLLypVfmcE X-Authority-Analysis: v=2.4 cv=duXrzVg4 c=1 sm=1 tr=0 ts=6a072c27 cx=c_pps a=AfN7/Ok6k8XGzOShvHwTGQ==:117 a=AfN7/Ok6k8XGzOShvHwTGQ==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=iQ6ETzBq9ecOQQE5vZCe:22 a=VnNF1IyMAAAA:8 a=HxxVBxD7FXS1ytRSE9oA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: Vk9kN3RNJI3bq8vbFbT44kmcusmLN0wu X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDE0MyBTYWx0ZWRfX7dDcHAfANlOI GKwpojpJaG7R1bvch3otKbJzIwMp0BiWYn7rHqHR3N9164Ug1+J362q2Fem5JBuahC6NVudBKnc LLC3VjG7QHU2CqVb3hnUmY4HfpmYn/dT+/Ky1s+Yr9BZfEZfWgtdTYF5jLuRUNYt/v7RkiuB0FU y4FIqW1KYb5BlSaehRP+Ni/edGqSaZSLIDHFyOZevqI53BWkXgM2pqJEO0K7Bx3w0gHqPC+YMdz dqwwGhGSECKYNwXWsBxZ4IN+4iA+nemw20T8fMpQN1I2y7XdzS5d62Fki2F5QytcYa5Dr7bYutI 3x4suhzacH5WtZfDYgGF16sQaz9Oi1z9DR7g2g4nQNaEiuUe7qsJkKqwjZx+chY1C76yhNxMvWy 1eKwF+edzqgjeT36CHG5SB8yhBWF4FCjWXuakv5486/oTMfIqCOUWEiMl8gHyfmB+SS4oy+9SBG 4PohG+EbdVb16N2Spaw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-15_03,2026-05-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 clxscore=1015 priorityscore=1501 phishscore=0 bulkscore=0 adultscore=0 impostorscore=0 lowpriorityscore=0 suspectscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150143 Replace iterating over pci_root_buses with the official pci_find_next_bus() call provided by PCI core. This allows to make pci_root_buses private to PCI core. Signed-off-by: Gerd Bayer --- arch/arm/kernel/bios32.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c index ac0e890510da..35642c9ba054 100644 --- a/arch/arm/kernel/bios32.c +++ b/arch/arm/kernel/bios32.c @@ -59,9 +59,9 @@ static void pcibios_bus_report_status(struct pci_bus *bus= , u_int status_mask, in =20 void pcibios_report_status(u_int status_mask, int warn) { - struct pci_bus *bus; + struct pci_bus *bus =3D NULL; =20 - list_for_each_entry(bus, &pci_root_buses, node) + while ((bus =3D pci_find_next_bus(bus)) !=3D NULL) pcibios_bus_report_status(bus, status_mask, warn); } =20 --=20 2.54.0 From nobody Mon May 25 08:13:35 2026 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 837243A7593; Fri, 15 May 2026 14:23:01 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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Peter Anvin" Cc: Yinghai Lu , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, Gerd Bayer X-Mailer: b4 0.14.3 X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-ORIG-GUID: FFfQU0OrTn0zzdD30lRJSC_3o5nA81Sl X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDE0MyBTYWx0ZWRfX0MJB1F+swIDZ cDbREqzjGwweWu9LtDXzqRraaE00hp2HmBvfB4Hdb0TMN5q6RdAnSW4eAjeWA1X9W/H5swreQqp 9L66gh7eZsV+DgyIZf/hOUx1xInEx3cLbpln7ZRsgL8MfywX2Wwq6hdlDJfAZppxDcNFMm30gpC zPDwRlo2T/Gf1oSUQV3Hp7AHmsDlX1Ft0OUUscMuas1Rz83PCQ7yRVGQ82Rg5M0DZkbwW8ybBfb 8IKWlZ5qmxWgzgNOakRqpaQ/mYzWsmEZaq4Myj0x6NzuYeAfD5jKeMHH1oPKAMfwDSqSD9yGJ6C jBQxuEIyLd6LZf1dIfGW1L6mYWivyHAs5kFyht1FrSXycpTyfwdfRn/s7+SqkI68NpBXyTB4+r9 a1agbgMlTSMm0jSzZoMts6TwiGLH4V2/Gr704LRE2nxwtEI3Y2schRKqyJBI23fEm4psOjl9YVa J1XDIe2C9Nm4pboY0Sw== X-Authority-Analysis: v=2.4 cv=ZZEt8MVA c=1 sm=1 tr=0 ts=6a072c28 cx=c_pps a=aDMHemPKRhS1OARIsFnwRA==:117 a=aDMHemPKRhS1OARIsFnwRA==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=uAbxVGIbfxUO_5tXvNgY:22 a=VnNF1IyMAAAA:8 a=Nc3X6MLr1OvL3U8oulEA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-GUID: wCwM_yqRW6cn_hXtPnpJTdbPYVQduWPs X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-15_03,2026-05-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 malwarescore=0 bulkscore=0 impostorscore=0 phishscore=0 spamscore=0 lowpriorityscore=0 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150143 Replace iterating over pci_root_buses with the official pci_find_next_bus() call provided by PCI core. This allows to make pci_root_buses private to PCI core. Signed-off-by: Gerd Bayer --- arch/powerpc/kernel/pci-common.c | 7 ++++--- arch/powerpc/kernel/pci_64.c | 4 ++-- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-com= mon.c index 8efe95a0c4ff..1e0be7bcaa56 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -1417,10 +1417,10 @@ static void __init pcibios_reserve_legacy_regions(s= truct pci_bus *bus) =20 void __init pcibios_resource_survey(void) { - struct pci_bus *b; + struct pci_bus *b =3D NULL; =20 /* Allocate and assign resources */ - list_for_each_entry(b, &pci_root_buses, node) + while ((b =3D pci_find_next_bus(b)) !=3D NULL) pcibios_allocate_bus_resources(b); if (!pci_has_flag(PCI_REASSIGN_ALL_RSRC)) { pcibios_allocate_resources(0); @@ -1432,7 +1432,8 @@ void __init pcibios_resource_survey(void) * bus available resources to avoid allocating things on top of them */ if (!pci_has_flag(PCI_PROBE_ONLY)) { - list_for_each_entry(b, &pci_root_buses, node) + b =3D NULL; /* Start all over */ + while ((b =3D pci_find_next_bus(b)) !=3D NULL) pcibios_reserve_legacy_regions(b); } =20 diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index e27342ef128b..f816d063b984 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -227,7 +227,7 @@ SYSCALL_DEFINE3(pciconfig_iobase, long, which, unsigned= long, in_bus, unsigned long, in_devfn) { struct pci_controller* hose; - struct pci_bus *tmp_bus, *bus =3D NULL; + struct pci_bus *tmp_bus =3D NULL, *bus =3D NULL; struct device_node *hose_node; =20 /* Argh ! Please forgive me for that hack, but that's the @@ -248,7 +248,7 @@ SYSCALL_DEFINE3(pciconfig_iobase, long, which, unsigned= long, in_bus, * used on pre-domains setup. We return the first match */ =20 - list_for_each_entry(tmp_bus, &pci_root_buses, node) { + while ((tmp_bus =3D pci_find_next_bus(tmp_bus)) !=3D NULL) { if (in_bus >=3D tmp_bus->number && in_bus <=3D tmp_bus->busn_res.end) { bus =3D tmp_bus; --=20 2.54.0 From nobody Mon May 25 08:13:35 2026 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EFF5A3B19DB; Fri, 15 May 2026 14:23:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778854990; cv=none; b=TautddhYmE2gyKkCttUcI5TVDjVqACXJsVn7suLJP1l2kU7rp+u0wxUv1IQ1O9hud5caJuj1rZMEWhhUIj2uh7gRPpNz6qpbJwnLCovyTwUs/7WxYr4GyL7r/wt7Ibwq52zSMEyxk1CcnuRAwFo1TLYxlYRiQFmr4r33E6wvPuA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778854990; c=relaxed/simple; bh=6WBKg3Z6d6bDxwbEE57rV0gZXpgH4cYTHFISRN8uP/4=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=maiXLQvLlRV88ccxQDLKb0Mg0GtqzapDxAt+Pgmtj5jn4Op0NQ/hZFiPS8laDktVCxCVyiPYa+KD00oTt9opNRYQ43cJ2TScTHW26GkETwfmafeJR/JnJIFLKrVhz9dF+a1Z7Bxr5/sYpJxJzafZWC4/nq89LOFAqvlHwi3ZNbw= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com; spf=pass smtp.mailfrom=linux.ibm.com; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b=DQyfFv7h; arc=none smtp.client-ip=148.163.156.1 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.ibm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=ibm.com header.i=@ibm.com header.b="DQyfFv7h" Received: from pps.filterd (m0356517.ppops.net [127.0.0.1]) by mx0a-001b2d01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 64FAWWhF3950751; Fri, 15 May 2026 14:22:34 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=pp1; bh=sSrBZL pLsG21cYV5sFRehKkQIMmaXEBuOlBtNeue/K0=; b=DQyfFv7hqyMqDY11+8o6y2 Gb8giGVwPZ25I3udbDcpgZX8ubOe6/CS+Oh2WAGQQ4QO4NGF7Z6QH+82qkC2uDxu QEA7br6P123CEF/PgSu12dmD/Zf1Gx+EAgApa0HRteFFkN+F79C7Q38mQzm2zv18 +9sOHLEKAn6yio/1+xTNAbxStGxNvCqx/dHMZJVaUI/e8gLGt8+zIraYFYrBtovd /4+Ale/7IfWRAiLfvYAhWOCvWygF65fkaTfDWvRkdo7VkHXJSVCt703YjzKBjBCl nSrT+0QpCNKO/uoXYcdMMrP/xevd9XGOIKsK4s+vYhfn9wYA835pr/Fb/LY8I+0A == Received: from ppma23.wdc07v.mail.ibm.com (5d.69.3da9.ip4.static.sl-reverse.com [169.61.105.93]) by mx0a-001b2d01.pphosted.com (PPS) with ESMTPS id 4e5m8ybkfb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 May 2026 14:22:33 +0000 (GMT) Received: from pps.filterd (ppma23.wdc07v.mail.ibm.com [127.0.0.1]) by ppma23.wdc07v.mail.ibm.com (8.18.1.7/8.18.1.7) with ESMTP id 64FE9Dxo026631; Fri, 15 May 2026 14:22:32 GMT Received: from smtprelay07.fra02v.mail.ibm.com ([9.218.2.229]) by ppma23.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4e5kvckvdu-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 May 2026 14:22:32 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay07.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 64FEMS1545089222 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 15 May 2026 14:22:28 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 445612004D; Fri, 15 May 2026 14:22:28 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 309FA20043; Fri, 15 May 2026 14:22:27 +0000 (GMT) Received: from [192.168.178.55] (unknown [9.87.148.246]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 15 May 2026 14:22:27 +0000 (GMT) From: Gerd Bayer Date: Fri, 15 May 2026 16:22:06 +0200 Subject: [PATCH 4/5] x86/pci: Use official API to iterate over PCI buses Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260515-priv_root_buses-v1-4-f8e393c57390@linux.ibm.com> References: <20260515-priv_root_buses-v1-0-f8e393c57390@linux.ibm.com> In-Reply-To: <20260515-priv_root_buses-v1-0-f8e393c57390@linux.ibm.com> To: Richard Henderson , Matt Turner , Magnus Lindholm , Russell King , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Bjorn Helgaas , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" Cc: Yinghai Lu , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, Gerd Bayer X-Mailer: b4 0.14.3 X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: 9Fn6JSOYn5leHLgBxi1ZPSEXCI3IZ1Fr X-Authority-Analysis: v=2.4 cv=Os5/DS/t c=1 sm=1 tr=0 ts=6a072c2a cx=c_pps a=3Bg1Hr4SwmMryq2xdFQyZA==:117 a=3Bg1Hr4SwmMryq2xdFQyZA==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=OS3CRczKEtLnDcx_Za4A:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: Hovlul_bhRsIek30WEVnGj5qQFZaeLIw X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDE0MyBTYWx0ZWRfX8fTqgyx8V9Rj 7PIPlXLIF2L+55hDHOOLgFHrNMNvc+E9B/YgLccoZ9JbpahswH+v0GcPtNUy1Fj/4YbDFMmjpN5 dsOAzBtjiTJGzessVoH9tOvhsmvQqkhRJYcrYG4+sPegQbIJZrtixlITfUPJUTFb+b8jrwPmd89 xzvZcmH0VHM0f9gFbct8PjAQfk/vjPi9eVEyl2gTNvoonUq3wIEvqxS1yQ7vPgwHle4FiApuoLw lEOE9WqGAblLXwLwbBGJwjUi63SlvtDBcXrNMK0MnmgPskxcksDNPcdzhHif80L4SQjmEHID0lH WVpnEqFSmDr2BJVq1aCE1we6mrvOrz14mU99t6i0yH5u3MS1pGOSD5+2ojbUXsIfqat+2BNPngS ZNds6u3CUxixk0LLa9V5IyiZvcIlKW666DsSaV8LZXI+t1aQFLBxNxT/c9fr0dJ8Ch0oqjZU8+s T9qrTeS+f9x7LA7dKfA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-15_03,2026-05-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 impostorscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 malwarescore=0 priorityscore=1501 bulkscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150143 Replace iterating over pci_root_buses with the official pci_find_next_bus() call provided by PCI core. This allows to make pci_root_buses private to PCI core. Signed-off-by: Gerd Bayer --- arch/x86/pci/i386.c | 14 ++++++++------ 1 file changed, 8 insertions(+), 6 deletions(-) diff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c index e2de26b82940..194d0fa3cec8 100644 --- a/arch/x86/pci/i386.c +++ b/arch/x86/pci/i386.c @@ -357,10 +357,10 @@ static void pcibios_allocate_rom_resources(struct pci= _bus *bus) =20 static int __init pcibios_assign_resources(void) { - struct pci_bus *bus; + struct pci_bus *bus =3D NULL; =20 if (!(pci_probe & PCI_ASSIGN_ROMS)) - list_for_each_entry(bus, &pci_root_buses, node) + while ((bus =3D pci_find_next_bus(bus)) !=3D NULL) pcibios_allocate_rom_resources(bus); =20 pci_assign_unassigned_resources(); @@ -390,16 +390,18 @@ void pcibios_resource_survey_bus(struct pci_bus *bus) =20 void __init pcibios_resource_survey(void) { - struct pci_bus *bus; + struct pci_bus *bus =3D NULL; =20 DBG("PCI: Allocating resources\n"); =20 - list_for_each_entry(bus, &pci_root_buses, node) + while ((bus =3D pci_find_next_bus(bus)) !=3D NULL) pcibios_allocate_bus_resources(bus); =20 - list_for_each_entry(bus, &pci_root_buses, node) + bus =3D NULL; /* start all over */ + while ((bus =3D pci_find_next_bus(bus)) !=3D NULL) pcibios_allocate_resources(bus, 0); - list_for_each_entry(bus, &pci_root_buses, node) + bus =3D NULL; /* start all over */ + while ((bus =3D pci_find_next_bus(bus)) !=3D NULL) pcibios_allocate_resources(bus, 1); =20 e820__reserve_resources_late(); --=20 2.54.0 From nobody Mon May 25 08:13:35 2026 Received: from mx0a-001b2d01.pphosted.com (mx0a-001b2d01.pphosted.com [148.163.156.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB90C3A7F4A; Fri, 15 May 2026 14:23:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.163.156.1 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778854991; cv=none; b=fMV4LzXNKjXgqllxkB3FHAJGZgpMiJyEEXjbRVgd0ELlzQW/3t0xU6MgvGMk6wWbSMXlV6PRBpHtvCj2xY4u1adN1IjeXQsNKNla3c4vS1AMaCAeKO6sIQ0dxyHMPT02y8B6B7SbRxbfG5cRMUbd16+JC+ZkchD58aJABHHDNA0= ARC-Message-Signature: i=1; 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Fri, 15 May 2026 14:22:33 GMT Received: from smtprelay03.fra02v.mail.ibm.com ([9.218.2.224]) by ppma21.wdc07v.mail.ibm.com (PPS) with ESMTPS id 4e5kvcuvay-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 15 May 2026 14:22:33 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (smtpav04.fra02v.mail.ibm.com [10.20.54.103]) by smtprelay03.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 64FEMTTB53412222 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 15 May 2026 14:22:29 GMT Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 844BD20040; Fri, 15 May 2026 14:22:29 +0000 (GMT) Received: from smtpav04.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 59E7420043; Fri, 15 May 2026 14:22:28 +0000 (GMT) Received: from [192.168.178.55] (unknown [9.87.148.246]) by smtpav04.fra02v.mail.ibm.com (Postfix) with ESMTP; Fri, 15 May 2026 14:22:28 +0000 (GMT) From: Gerd Bayer Date: Fri, 15 May 2026 16:22:07 +0200 Subject: [PATCH 5/5] PCI: Make pci_root_buses private to PCI core Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20260515-priv_root_buses-v1-5-f8e393c57390@linux.ibm.com> References: <20260515-priv_root_buses-v1-0-f8e393c57390@linux.ibm.com> In-Reply-To: <20260515-priv_root_buses-v1-0-f8e393c57390@linux.ibm.com> To: Richard Henderson , Matt Turner , Magnus Lindholm , Russell King , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , "Christophe Leroy (CS GROUP)" , Bjorn Helgaas , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" Cc: Yinghai Lu , linux-alpha@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, Gerd Bayer X-Mailer: b4 0.14.3 X-TM-AS-GCONF: 00 X-Proofpoint-Reinject: loops=2 maxloops=12 X-Proofpoint-GUID: 2_E4E5fQqGK_gdgWkz3XVFqX2Y64d0U- X-Authority-Analysis: v=2.4 cv=Os5/DS/t c=1 sm=1 tr=0 ts=6a072c2a cx=c_pps a=GFwsV6G8L6GxiO2Y/PsHdQ==:117 a=GFwsV6G8L6GxiO2Y/PsHdQ==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=VkNPw1HP01LnGYTKEx00:22 a=RnoormkPH1_aCDwRdu11:22 a=U7nrCbtTmkRpXpFmAIza:22 a=VnNF1IyMAAAA:8 a=28hvmymbyGcFHlkD5P8A:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: gbZhqh0AjV2r8Vc2qnzG8viGM-BWhP2c X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDE0MyBTYWx0ZWRfX8z4Tzbj1mY3i OEcTYAqVviT097HtrxKeQs5QgPSSPoxwMDRWUARFq9HWbqoZOmAO3g/f2FiP4CHxWVz+kvd9yyI fdlfRR+Ij9IyF52PMHC3ST7BN9J7msYmDV+CBuCut9r4jshOtyh52Q4gMy5Cxh2QBay1MC6JWny SMVEgbAiFwzafkGzqPBBkIcToihe3YzCW0yAcq2hevlIfDOeWt7qHJZcsZbvVvZ0JEZQBqBeQTm MxWdTKx3rMRXOWoBQSz6I7xJY4nOrvnLx7i9Ojl9IGga3ItD9V2gGjkAoJczV6Kq0tOIyQFH99u Ge+o32YtYT7Wgp1zKUvHYBZu3P3hI41t6EFW1lDD4JWY+4i8xdvvyzf6z0bXRtD4blf/Whzr0Sk ogX/QCjpchV5L71bBnKKutAPOnuPlng/sh5Y6E9GCCRy6dxMggiXe5ocOFOQ1vbopuFIIloL/Zq WuNcajT4UphwmTXDVcQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-15_03,2026-05-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 impostorscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 malwarescore=0 priorityscore=1501 bulkscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150143 After all users of pci_root_buses external to PCI core have been converted to using pci_find_next_bus(), move its declaration to the PCI core code and stop exporting the symbol. Signed-off-by: Gerd Bayer --- drivers/pci/pci.h | 3 +++ drivers/pci/probe.c | 2 -- include/linux/pci.h | 4 ---- 3 files changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 4a14f88e543a..1f36d400c9e0 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -366,6 +366,9 @@ static inline void pci_create_legacy_files(struct pci_b= us *bus) { } static inline void pci_remove_legacy_files(struct pci_bus *bus) { } #endif =20 +/* List of all known PCI buses */ +extern struct list_head pci_root_buses; + /* Lock for read/write access to pci device and bus lists */ extern struct rw_semaphore pci_bus_sem; extern struct mutex pci_slot_mutex; diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c index b63cd0c310bc..2e97ab125ead 100644 --- a/drivers/pci/probe.c +++ b/drivers/pci/probe.c @@ -33,9 +33,7 @@ static struct resource busn_resource =3D { .flags =3D IORESOURCE_BUS, }; =20 -/* Ugh. Need to stop exporting this to modules. */ LIST_HEAD(pci_root_buses); -EXPORT_SYMBOL(pci_root_buses); =20 static LIST_HEAD(pci_domain_busn_res_list); =20 diff --git a/include/linux/pci.h b/include/linux/pci.h index 2c4454583c11..1c4610848b5c 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -1192,10 +1192,6 @@ extern enum pcie_bus_config_types pcie_bus_config; =20 extern const struct bus_type pci_bus_type; =20 -/* Do NOT directly access these two variables, unless you are arch-specifi= c PCI - * code, or PCI core code. */ -extern struct list_head pci_root_buses; /* List of all known PCI buses */ - void pcibios_resource_survey_bus(struct pci_bus *bus); void pcibios_bus_add_device(struct pci_dev *pdev); void pcibios_add_bus(struct pci_bus *bus); --=20 2.54.0