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GET /api/patches/2215475/?format=api
{ "id": 2215475, "url": "http://patchwork.ozlabs.org/api/patches/2215475/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260324165633.4583-3-ilpo.jarvinen@linux.intel.com/", "project": { "id": 28, "url": "http://patchwork.ozlabs.org/api/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": "<20260324165633.4583-3-ilpo.jarvinen@linux.intel.com>", "list_archive_url": null, "date": "2026-03-24T16:56:25", "name": "[02/10] resource: Pass full extent of empty space to resource_alignf CB", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "22973c3173f209f4306312093ce9076c47b802d0", "submitter": { "id": 83553, "url": "http://patchwork.ozlabs.org/api/people/83553/?format=api", "name": "Ilpo Järvinen", "email": "ilpo.jarvinen@linux.intel.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linux-pci/patch/20260324165633.4583-3-ilpo.jarvinen@linux.intel.com/mbox/", "series": [ { "id": 497318, "url": "http://patchwork.ozlabs.org/api/series/497318/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linux-pci/list/?series=497318", "date": "2026-03-24T16:56:23", "name": "PCI: Improve head free space usage", "version": 1, "mbox": "http://patchwork.ozlabs.org/series/497318/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2215475/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2215475/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linux-pci+bounces-50931-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=intel.com header.i=@intel.com header.a=rsa-sha256\n header.s=Intel header.b=HQQGzlch;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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a=\"86471700\"", "E=Sophos;i=\"6.23,138,1770624000\";\n d=\"scan'208\";a=\"86471700\"", "E=Sophos;i=\"6.23,138,1770624000\";\n d=\"scan'208\";a=\"224666153\"" ], "X-ExtLoop1": "1", "From": "=?utf-8?q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>", "To": "linux-pci@vger.kernel.org,\n\tBjorn Helgaas <bhelgaas@google.com>,\n\tGuenter Roeck <linux@roeck-us.net>,\n\tlinux-alpha@vger.kernel.org,\n\tlinux-arm-kernel@lists.infradead.org,\n\tlinux-m68k@lists.linux-m68k.org,\n\tlinux-mips@vger.kernel.org,\n\tlinux-parisc@vger.kernel.org,\n\tlinuxppc-dev@lists.ozlabs.org,\n\tlinux-s390@vger.kernel.org,\n\tlinux-sh@vger.kernel.org,\n\tRussell King <linux@armlinux.org.uk>,\n\tGeert Uytterhoeven <geert@linux-m68k.org>,\n\tThomas Bogendoerfer <tsbogend@alpha.franken.de>,\n\t\"James E.J. Bottomley\" <James.Bottomley@HansenPartnership.com>,\n\tHelge Deller <deller@gmx.de>,\n\tMichael Ellerman <mpe@ellerman.id.au>,\n\tThomas Gleixner <tglx@kernel.org>,\n\tIngo Molnar <mingo@redhat.com>,\n\tBorislav Petkov <bp@alien8.de>,\n\tDave Hansen <dave.hansen@linux.intel.com>,\n\t\"H. Peter Anvin\" <hpa@zytor.com>,\n\tChris Zankel <chris@zankel.net>,\n\tMax Filippov <jcmvbkbc@gmail.com>,\n\tMadhavan Srinivasan <maddy@linux.ibm.com>,\n\tYoshinori Sato <ysato@users.sourceforge.jp>,\n\tRich Felker <dalias@libc.org>,\n\tJohn Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>,\n\tRichard Henderson <richard.henderson@linaro.org>,\n\tMatt Turner <mattst88@gmail.com>,\n\tMagnus Lindholm <linmag7@gmail.com>,\n\tNicholas Piggin <npiggin@gmail.com>,\n\t\"Christophe Leroy (CS GROUP)\" <chleroy@kernel.org>,\n\tNiklas Schnelle <schnelle@linux.ibm.com>,\n\tGerald Schaefer <gerald.schaefer@linux.ibm.com>,\n\tHeiko Carstens <hca@linux.ibm.com>,\n\tVasily Gorbik <gor@linux.ibm.com>,\n\tAlexander Gordeev <agordeev@linux.ibm.com>,\n\tChristian Borntraeger <borntraeger@linux.ibm.com>,\n\tSven Schnelle <svens@linux.ibm.com>,\n\tx86@kernel.org,\n\tDominik Brodowski <linux@dominikbrodowski.net>,\n\tlinux-kernel@vger.kernel.org", "Cc": "=?utf-8?q?Ilpo_J=C3=A4rvinen?= <ilpo.jarvinen@linux.intel.com>", "Subject": "[PATCH 02/10] resource: Pass full extent of empty space to\n resource_alignf CB", "Date": "Tue, 24 Mar 2026 18:56:25 +0200", "Message-Id": "<20260324165633.4583-3-ilpo.jarvinen@linux.intel.com>", "X-Mailer": "git-send-email 2.39.5", "In-Reply-To": "<20260324165633.4583-1-ilpo.jarvinen@linux.intel.com>", "References": "<20260324165633.4583-1-ilpo.jarvinen@linux.intel.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", "Content-Type": "text/plain; charset=UTF-8", "Content-Transfer-Encoding": "8bit" }, "content": "__find_resource_space() calculates the full extent of empty space but\nonly passes the aligned space to resource_alignf callback. In some\nsituations, the callback may choose take advantage of the free space\nbefore the requested alignment.\n\nPass the full extent of the calculated empty space to resource_alignf\ncallback as an additional parameter.\n\nSigned-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>\n---\n arch/alpha/kernel/pci.c | 1 +\n arch/arm/kernel/bios32.c | 4 +++-\n arch/m68k/kernel/pcibios.c | 4 +++-\n arch/mips/pci/pci-generic.c | 3 ++-\n arch/mips/pci/pci-legacy.c | 1 +\n arch/parisc/kernel/pci.c | 4 +++-\n arch/powerpc/kernel/pci-common.c | 4 +++-\n arch/s390/pci/pci.c | 1 +\n arch/sh/drivers/pci/pci.c | 4 +++-\n arch/x86/pci/i386.c | 3 ++-\n arch/xtensa/kernel/pci.c | 1 +\n drivers/pci/setup-res.c | 3 ++-\n drivers/pcmcia/rsrc_nonstatic.c | 3 ++-\n include/linux/ioport.h | 2 ++\n include/linux/pci.h | 7 ++++---\n kernel/resource.c | 3 ++-\n 16 files changed, 35 insertions(+), 13 deletions(-)", "diff": "diff --git a/arch/alpha/kernel/pci.c b/arch/alpha/kernel/pci.c\nindex 51a8a4c4572a..11df411b1d18 100644\n--- a/arch/alpha/kernel/pci.c\n+++ b/arch/alpha/kernel/pci.c\n@@ -125,6 +125,7 @@ DECLARE_PCI_FIXUP_FINAL(PCI_ANY_ID, PCI_ANY_ID, pcibios_fixup_final);\n \n resource_size_t\n pcibios_align_resource(void *data, const struct resource *res,\n+\t\t const struct resource *empty_res,\n \t\t resource_size_t size, resource_size_t align)\n {\n \tstruct pci_dev *dev = data;\ndiff --git a/arch/arm/kernel/bios32.c b/arch/arm/kernel/bios32.c\nindex b5793e8fbdc1..5b9b4fcd0e54 100644\n--- a/arch/arm/kernel/bios32.c\n+++ b/arch/arm/kernel/bios32.c\n@@ -560,7 +560,9 @@ char * __init pcibios_setup(char *str)\n * which might be mirrored at 0x0100-0x03ff..\n */\n resource_size_t pcibios_align_resource(void *data, const struct resource *res,\n-\t\t\t\tresource_size_t size, resource_size_t align)\n+\t\t\t\t const struct resource *empty_res,\n+\t\t\t\t resource_size_t size,\n+\t\t\t\t resource_size_t align)\n {\n \tstruct pci_dev *dev = data;\n \tresource_size_t start = res->start;\ndiff --git a/arch/m68k/kernel/pcibios.c b/arch/m68k/kernel/pcibios.c\nindex e6ab3f9ff5d8..1415f6e4e5ce 100644\n--- a/arch/m68k/kernel/pcibios.c\n+++ b/arch/m68k/kernel/pcibios.c\n@@ -27,7 +27,9 @@\n * which might be mirrored at 0x0100-0x03ff..\n */\n resource_size_t pcibios_align_resource(void *data, const struct resource *res,\n-\tresource_size_t size, resource_size_t align)\n+\t\t\t\t const struct resource *empty_res,\n+\t\t\t\t resource_size_t size,\n+\t\t\t\t resource_size_t align)\n {\n \tresource_size_t start = res->start;\n \ndiff --git a/arch/mips/pci/pci-generic.c b/arch/mips/pci/pci-generic.c\nindex d2d68bac3d25..f4957c26efc7 100644\n--- a/arch/mips/pci/pci-generic.c\n+++ b/arch/mips/pci/pci-generic.c\n@@ -22,7 +22,8 @@\n * which might have be mirrored at 0x0100-0x03ff..\n */\n resource_size_t pcibios_align_resource(void *data, const struct resource *res,\n-\t\t\t\tresource_size_t size, resource_size_t align)\n+\t\t\t\t const struct resource *empty_res,\n+\t\t\t\t resource_size_t size, resource_size_t align)\n {\n \tstruct pci_dev *dev = data;\n \tresource_size_t start = res->start;\ndiff --git a/arch/mips/pci/pci-legacy.c b/arch/mips/pci/pci-legacy.c\nindex d04b7c1294b6..817e97402afe 100644\n--- a/arch/mips/pci/pci-legacy.c\n+++ b/arch/mips/pci/pci-legacy.c\n@@ -52,6 +52,7 @@ unsigned long pci_address_to_pio(phys_addr_t address)\n */\n resource_size_t\n pcibios_align_resource(void *data, const struct resource *res,\n+\t\t const struct resource *empty_res,\n \t\t resource_size_t size, resource_size_t align)\n {\n \tstruct pci_dev *dev = data;\ndiff --git a/arch/parisc/kernel/pci.c b/arch/parisc/kernel/pci.c\nindex cf285b17a5ae..f99b20795d5a 100644\n--- a/arch/parisc/kernel/pci.c\n+++ b/arch/parisc/kernel/pci.c\n@@ -196,7 +196,9 @@ void __ref pcibios_init_bridge(struct pci_dev *dev)\n * than res->start.\n */\n resource_size_t pcibios_align_resource(void *data, const struct resource *res,\n-\t\t\t\tresource_size_t size, resource_size_t alignment)\n+\t\t\t\t const struct resource *empty_res,\n+\t\t\t\t resource_size_t size,\n+\t\t\t\t resource_size_t alignment)\n {\n \tresource_size_t mask, align, start = res->start;\n \ndiff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c\nindex a7a2fb605971..e7bfa15da043 100644\n--- a/arch/powerpc/kernel/pci-common.c\n+++ b/arch/powerpc/kernel/pci-common.c\n@@ -1132,7 +1132,9 @@ static int skip_isa_ioresource_align(struct pci_dev *dev)\n * which might have be mirrored at 0x0100-0x03ff..\n */\n resource_size_t pcibios_align_resource(void *data, const struct resource *res,\n-\t\t\t\tresource_size_t size, resource_size_t align)\n+\t\t\t\t const struct resource *empty_res,\n+\t\t\t\t resource_size_t size,\n+\t\t\t\t resource_size_t align)\n {\n \tstruct pci_dev *dev = data;\n \tresource_size_t start = res->start;\ndiff --git a/arch/s390/pci/pci.c b/arch/s390/pci/pci.c\nindex 2a430722cbe4..39bd2adfc240 100644\n--- a/arch/s390/pci/pci.c\n+++ b/arch/s390/pci/pci.c\n@@ -266,6 +266,7 @@ static int zpci_cfg_store(struct zpci_dev *zdev, int offset, u32 val, u8 len)\n }\n \n resource_size_t pcibios_align_resource(void *data, const struct resource *res,\n+\t\t\t\t const struct resource *empty_res,\n \t\t\t\t resource_size_t size,\n \t\t\t\t resource_size_t align)\n {\ndiff --git a/arch/sh/drivers/pci/pci.c b/arch/sh/drivers/pci/pci.c\nindex a3903304f33f..7a0522316ee3 100644\n--- a/arch/sh/drivers/pci/pci.c\n+++ b/arch/sh/drivers/pci/pci.c\n@@ -168,7 +168,9 @@ subsys_initcall(pcibios_init);\n * modulo 0x400.\n */\n resource_size_t pcibios_align_resource(void *data, const struct resource *res,\n-\t\t\t\tresource_size_t size, resource_size_t align)\n+\t\t\t\t const struct resource *empty_res,\n+\t\t\t\t resource_size_t size,\n+\t\t\t\t resource_size_t align)\n {\n \tstruct pci_dev *dev = data;\n \tstruct pci_channel *hose = dev->sysdata;\ndiff --git a/arch/x86/pci/i386.c b/arch/x86/pci/i386.c\nindex c4ec39ad276b..6fbd4b34c3f7 100644\n--- a/arch/x86/pci/i386.c\n+++ b/arch/x86/pci/i386.c\n@@ -153,7 +153,8 @@ skip_isa_ioresource_align(struct pci_dev *dev) {\n */\n resource_size_t\n pcibios_align_resource(void *data, const struct resource *res,\n-\t\t\tresource_size_t size, resource_size_t align)\n+\t\t const struct resource *empty_res,\n+\t\t resource_size_t size, resource_size_t align)\n {\n \tstruct pci_dev *dev = data;\n \tresource_size_t start = res->start;\ndiff --git a/arch/xtensa/kernel/pci.c b/arch/xtensa/kernel/pci.c\nindex 62c900e400d6..64ccb7e0d92f 100644\n--- a/arch/xtensa/kernel/pci.c\n+++ b/arch/xtensa/kernel/pci.c\n@@ -39,6 +39,7 @@\n */\n resource_size_t\n pcibios_align_resource(void *data, const struct resource *res,\n+\t\t const struct resource *empty_res,\n \t\t resource_size_t size, resource_size_t align)\n {\n \tstruct pci_dev *dev = data;\ndiff --git a/drivers/pci/setup-res.c b/drivers/pci/setup-res.c\nindex bb2aef373d6f..c375e255c509 100644\n--- a/drivers/pci/setup-res.c\n+++ b/drivers/pci/setup-res.c\n@@ -251,10 +251,11 @@ static int pci_revert_fw_address(struct resource *res, struct pci_dev *dev,\n */\n resource_size_t __weak pcibios_align_resource(void *data,\n \t\t\t\t\t const struct resource *res,\n+\t\t\t\t\t const struct resource *empty_res,\n \t\t\t\t\t resource_size_t size,\n \t\t\t\t\t resource_size_t align)\n {\n- return res->start;\n+\treturn res->start;\n }\n \n static int __pci_assign_resource(struct pci_bus *bus, struct pci_dev *dev,\ndiff --git a/drivers/pcmcia/rsrc_nonstatic.c b/drivers/pcmcia/rsrc_nonstatic.c\nindex 0679dd434719..949e69921fe9 100644\n--- a/drivers/pcmcia/rsrc_nonstatic.c\n+++ b/drivers/pcmcia/rsrc_nonstatic.c\n@@ -602,7 +602,8 @@ static resource_size_t pcmcia_common_align(struct pcmcia_align_data *align_data,\n \n static resource_size_t\n pcmcia_align(void *align_data, const struct resource *res,\n-\tresource_size_t size, resource_size_t align)\n+\t const struct resource *empty_res,\n+\t resource_size_t size, resource_size_t align)\n {\n \tstruct pcmcia_align_data *data = align_data;\n \tstruct resource_map *m;\ndiff --git a/include/linux/ioport.h b/include/linux/ioport.h\nindex 19d5e04564d9..3c73c9c0d4f7 100644\n--- a/include/linux/ioport.h\n+++ b/include/linux/ioport.h\n@@ -202,6 +202,7 @@ enum {\n * typedef resource_alignf - Resource alignment callback\n * @data:\tPrivate data used by the callback\n * @res:\tResource candidate range (an empty resource space)\n+ * @empty_res:\tEmpty resource range without alignment applied\n * @size:\tThe minimum size of the empty space\n * @align:\tAlignment from the constraints\n *\n@@ -212,6 +213,7 @@ enum {\n */\n typedef resource_size_t (*resource_alignf)(void *data,\n \t\t\t\t\t const struct resource *res,\n+\t\t\t\t\t const struct resource *empty_res,\n \t\t\t\t\t resource_size_t size,\n \t\t\t\t\t resource_size_t align);\n \ndiff --git a/include/linux/pci.h b/include/linux/pci.h\nindex 1c270f1d5123..ac332ff9da9f 100644\n--- a/include/linux/pci.h\n+++ b/include/linux/pci.h\n@@ -1206,9 +1206,10 @@ int __must_check pcibios_enable_device(struct pci_dev *, int mask);\n char *pcibios_setup(char *str);\n \n /* Used only when drivers/pci/setup.c is used */\n-resource_size_t pcibios_align_resource(void *, const struct resource *,\n-\t\t\t\tresource_size_t,\n-\t\t\t\tresource_size_t);\n+resource_size_t pcibios_align_resource(void *data, const struct resource *res,\n+\t\t\t\t const struct resource *empty_res,\n+\t\t\t\t resource_size_t size,\n+\t\t\t\t resource_size_t align);\n \n /* Generic PCI functions used internally */\n \ndiff --git a/kernel/resource.c b/kernel/resource.c\nindex 1e2f1dfc0edd..1b8d3101bdc6 100644\n--- a/kernel/resource.c\n+++ b/kernel/resource.c\n@@ -759,7 +759,8 @@ static int __find_resource_space(struct resource *root, struct resource *old,\n \t\t\talloc.flags = avail.flags;\n \t\t\tif (alignf) {\n \t\t\t\talloc.start = alignf(constraint->alignf_data,\n-\t\t\t\t\t\t &avail, size, constraint->align);\n+\t\t\t\t\t\t &avail, &tmp,\n+\t\t\t\t\t\t size, constraint->align);\n \t\t\t} else {\n \t\t\t\talloc.start = avail.start;\n \t\t\t}\n", "prefixes": [ "02/10" ] }