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GET /api/patches/2218963/?format=api
{ "id": 2218963, "url": "http://patchwork.ozlabs.org/api/patches/2218963/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260402072701.628293-10-ruanjinjie@huawei.com/", "project": { "id": 2, "url": "http://patchwork.ozlabs.org/api/projects/2/?format=api", "name": "Linux PPC development", "link_name": "linuxppc-dev", "list_id": "linuxppc-dev.lists.ozlabs.org", "list_email": "linuxppc-dev@lists.ozlabs.org", "web_url": "https://github.com/linuxppc/wiki/wiki", "scm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git", "webscm_url": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/", "list_archive_url_format": "https://lore.kernel.org/linuxppc-dev/{}/", "commit_url_format": "https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git/commit/?id={}" }, "msgid": "<20260402072701.628293-10-ruanjinjie@huawei.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260402072701.628293-10-ruanjinjie@huawei.com/", "date": "2026-04-02T07:26:55", "name": "[v12,09/15] arm64: kexec_file: Use crash_prepare_headers() helper to simplify code", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "bf2e2f0a45208b8cb8b5769d4e2ca4218c13e285", "submitter": { "id": 84791, "url": "http://patchwork.ozlabs.org/api/people/84791/?format=api", "name": "Jinjie Ruan", "email": "ruanjinjie@huawei.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260402072701.628293-10-ruanjinjie@huawei.com/mbox/", "series": [ { "id": 498443, "url": "http://patchwork.ozlabs.org/api/series/498443/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/list/?series=498443", "date": "2026-04-02T07:26:46", "name": "arm64/riscv: Add support for crashkernel CMA reservation", "version": 12, "mbox": "http://patchwork.ozlabs.org/series/498443/mbox/" } ], "comments": "http://patchwork.ozlabs.org/api/patches/2218963/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218963/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19200-incoming=patchwork.ozlabs.org@lists.ozlabs.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "linuxppc-dev@lists.ozlabs.org" ], "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=huawei.com header.i=@huawei.com header.a=rsa-sha256\n header.s=dkim header.b=s9WFOKlU;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=lists.ozlabs.org\n (client-ip=2404:9400:21b9:f100::1; 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Thu, 2 Apr\n 2026 15:26:08 +0800" ], "ARC-Seal": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1775114776;\n\tcv=none;\n b=YUtK0+Nbl1tWfDyU37Mvok5oDrtWARzAr2dhLAerDRDrR7FtY7Zt7/AXdAmPnE0PsXaDEFTlf2Ktq00pvAzmV+0hhGQdLx0pXKaj9xyRbBqK/s2rBNkZn26p5frC7Ajp9fbTbLvteSI8vOkUb8TkK1VOstMWoYGa8xFX1Ra74aDM5oKnEGIN/9rK6prp3udEzkuipRAe/QN1kkSeVxmb6YPEApCkJlO44q8T0hUxk0z4goP1FtIUofciofPmT2awPznMoNKlFNwGE43aRl/FcwJFBJyQXpxPf9j6mXrrkLjKE99MtpFVfKRnKBCDIBknJpPrdGvONTkSRu+6d4yM2w==", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707;\n\tt=1775114776; c=relaxed/relaxed;\n\tbh=xwMy+mSr5VfOZyHR78JJCh6UmVUbtVAVou+qQ4E0OEo=;\n\th=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=lNPDlNpjm6Vigr17YnpNezdi5HqcKYDnXGehc1qcGb6flBKKNA7NNrWWjHpniHf1SLuI1JiLuGuzWJxydQLOUFuUrqYqr3Qbb3qS4/eFmRicng5hSdVbU33Py0a2hc7kGmN/Gj1iMU76j5yCxX0LE5NrfW24yuvuGydvbBZzA2qNgkCQXYQ99KnwgYfVJCTtP7SSjwFmeSAmzNIe0qodS8DtD9Epr2xUx8J5M69rw+vZSdaibHJCAsyOlcTjbi6SFTox5DjiAUNtVkmNDd6mX4bxjJoyTlgnXLj6XxHdVrQZEIQ8fRCwBk6LVHO7GQCBHeHHAiCbrHbLzMeY5e3Dzw==", "ARC-Authentication-Results": "i=1; lists.ozlabs.org;\n dmarc=pass (p=quarantine dis=none) header.from=huawei.com;\n dkim=pass (1024-bit key;\n unprotected) header.d=huawei.com header.i=@huawei.com header.a=rsa-sha256\n header.s=dkim header.b=s9WFOKlU; dkim-atps=neutral;\n spf=pass (client-ip=113.46.200.226; helo=canpmsgout11.his.huawei.com;\n envelope-from=ruanjinjie@huawei.com;\n receiver=lists.ozlabs.org) smtp.mailfrom=huawei.com", "dkim-signature": "v=1; a=rsa-sha256; d=huawei.com; s=dkim;\n\tc=relaxed/relaxed; q=dns/txt;\n\th=From;\n\tbh=xwMy+mSr5VfOZyHR78JJCh6UmVUbtVAVou+qQ4E0OEo=;\n\tb=s9WFOKlUk3hQRJYOxtcvBqPFLOVRW3MhJ000OnHC5lfCmIorgaYIq9Yo7EmXvpkQKW9S+jjNd\n\tQNA4E8Sm+8bZyaRP68efOFMjhCzZujdd6CgBYFOiODPB3EW/BECi4OGprZCSJUWGpm0DCgTOdbO\n\tWOLa0JCkxELbxjhTGS3BtnA=", "From": "Jinjie Ruan <ruanjinjie@huawei.com>", "To": "<corbet@lwn.net>, <skhan@linuxfoundation.org>, <catalin.marinas@arm.com>,\n\t<will@kernel.org>, <chenhuacai@kernel.org>, <kernel@xen0n.name>,\n\t<maddy@linux.ibm.com>, <mpe@ellerman.id.au>, <npiggin@gmail.com>,\n\t<chleroy@kernel.org>, <pjw@kernel.org>, <palmer@dabbelt.com>,\n\t<aou@eecs.berkeley.edu>, <alex@ghiti.fr>, <tglx@kernel.org>,\n\t<mingo@redhat.com>, <bp@alien8.de>, <dave.hansen@linux.intel.com>,\n\t<hpa@zytor.com>, <robh@kernel.org>, <saravanak@kernel.org>,\n\t<akpm@linux-foundation.org>, <bhe@redhat.com>, <vgoyal@redhat.com>,\n\t<dyoung@redhat.com>, <rdunlap@infradead.org>, <peterz@infradead.org>,\n\t<pawan.kumar.gupta@linux.intel.com>, <feng.tang@linux.alibaba.com>,\n\t<dapeng1.mi@linux.intel.com>, <kees@kernel.org>, <elver@google.com>,\n\t<paulmck@kernel.org>, <lirongqing@baidu.com>, <rppt@kernel.org>,\n\t<leitao@debian.org>, <ardb@kernel.org>, <jbohac@suse.cz>,\n\t<cfsworks@gmail.com>, <tangyouling@kylinos.cn>, <sourabhjain@linux.ibm.com>,\n\t<ritesh.list@gmail.com>, <hbathini@linux.ibm.com>, <eajames@linux.ibm.com>,\n\t<guoren@kernel.org>, <songshuaishuai@tinylab.org>, <kevin.brodsky@arm.com>,\n\t<vishal.moola@gmail.com>, <junhui.liu@pigmoral.tech>, <coxu@redhat.com>,\n\t<fuqiang.wang@easystack.cn>, <liaoyuanhong@vivo.com>,\n\t<takahiro.akashi@linaro.org>, <james.morse@arm.com>, <lizhengyu3@huawei.com>,\n\t<x86@kernel.org>, <linux-doc@vger.kernel.org>,\n\t<linux-kernel@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>,\n\t<loongarch@lists.linux.dev>, <linuxppc-dev@lists.ozlabs.org>,\n\t<linux-riscv@lists.infradead.org>, <devicetree@vger.kernel.org>,\n\t<kexec@lists.infradead.org>", "CC": "<ruanjinjie@huawei.com>", "Subject": "[PATCH v12 09/15] arm64: kexec_file: Use crash_prepare_headers()\n helper to simplify code", "Date": "Thu, 2 Apr 2026 15:26:55 +0800", "Message-ID": "<20260402072701.628293-10-ruanjinjie@huawei.com>", "X-Mailer": "git-send-email 2.34.1", "In-Reply-To": "<20260402072701.628293-1-ruanjinjie@huawei.com>", "References": "<20260402072701.628293-1-ruanjinjie@huawei.com>", "X-Mailing-List": "linuxppc-dev@lists.ozlabs.org", "List-Id": "<linuxppc-dev.lists.ozlabs.org>", "List-Help": "<mailto:linuxppc-dev+help@lists.ozlabs.org>", "List-Owner": "<mailto:linuxppc-dev+owner@lists.ozlabs.org>", "List-Post": "<mailto:linuxppc-dev@lists.ozlabs.org>", "List-Archive": "<https://lore.kernel.org/linuxppc-dev/>,\n <https://lists.ozlabs.org/pipermail/linuxppc-dev/>", "List-Subscribe": "<mailto:linuxppc-dev+subscribe@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-digest@lists.ozlabs.org>,\n <mailto:linuxppc-dev+subscribe-nomail@lists.ozlabs.org>", "List-Unsubscribe": "<mailto:linuxppc-dev+unsubscribe@lists.ozlabs.org>", "Precedence": "list", "MIME-Version": "1.0", "Content-Transfer-Encoding": "8bit", "Content-Type": "text/plain", "X-Originating-IP": "[10.90.53.73]", "X-ClientProxiedBy": "kwepems100002.china.huawei.com (7.221.188.206) To\n dggpemf500011.china.huawei.com (7.185.36.131)", "X-Spam-Status": "No, score=-0.2 required=3.0 tests=DKIM_SIGNED,DKIM_VALID,\n\tDKIM_VALID_AU,DKIM_VALID_EF,SPF_HELO_NONE,SPF_PASS autolearn=disabled\n\tversion=4.0.1 OzLabs 8", "X-Spam-Checker-Version": "SpamAssassin 4.0.1 (2024-03-25) on lists.ozlabs.org" }, "content": "Use the newly introduced crash_prepare_headers() function to replace\nthe existing prepare_elf_headers(), allocate cmem and exclude crash\nkernel memory in the crash core, which reduce code duplication.\n\nOnly the following two architecture functions need to be implemented:\n- arch_get_system_nr_ranges(). Use for_each_mem_range() to traverse\n and pre-count the max number of memory ranges.\n\n- arch_crash_populate_cmem(). Use for_each_mem_range to traverse\n and collect the memory ranges and fills them into cmem.\n\nAcked-by: Catalin Marinas <catalin.marinas@arm.com>\nReviewed-by: Sourabh Jain <sourabhjain@linux.ibm.com>\nAcked-by: Baoquan He <bhe@redhat.com>\nAcked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>\nSigned-off-by: Jinjie Ruan <ruanjinjie@huawei.com>\n---\n arch/arm64/kernel/machine_kexec_file.c | 46 ++++++++------------------\n 1 file changed, 14 insertions(+), 32 deletions(-)", "diff": "diff --git a/arch/arm64/kernel/machine_kexec_file.c b/arch/arm64/kernel/machine_kexec_file.c\nindex df52ac4474c9..558408f403b5 100644\n--- a/arch/arm64/kernel/machine_kexec_file.c\n+++ b/arch/arm64/kernel/machine_kexec_file.c\n@@ -40,51 +40,33 @@ int arch_kimage_file_post_load_cleanup(struct kimage *image)\n }\n \n #ifdef CONFIG_CRASH_DUMP\n-static int prepare_elf_headers(void **addr, unsigned long *sz)\n+unsigned int arch_get_system_nr_ranges(void)\n {\n-\tstruct crash_mem *cmem;\n-\tunsigned int nr_ranges;\n-\tint ret;\n-\tu64 i;\n+\tunsigned int nr_ranges = 2; /* for exclusion of crashkernel region */\n \tphys_addr_t start, end;\n+\tu64 i;\n \n-\tnr_ranges = 2; /* for exclusion of crashkernel region */\n \tfor_each_mem_range(i, &start, &end)\n \t\tnr_ranges++;\n \n-\tcmem = kmalloc_flex(*cmem, ranges, nr_ranges);\n-\tif (!cmem)\n-\t\treturn -ENOMEM;\n+\treturn nr_ranges;\n+}\n+\n+int arch_crash_populate_cmem(struct crash_mem *cmem)\n+{\n+\tphys_addr_t start, end;\n+\tu64 i;\n \n-\tcmem->max_nr_ranges = nr_ranges;\n-\tcmem->nr_ranges = 0;\n \tfor_each_mem_range(i, &start, &end) {\n-\t\tif (cmem->nr_ranges >= cmem->max_nr_ranges) {\n-\t\t\tret = -ENOMEM;\n-\t\t\tgoto out;\n-\t\t}\n+\t\tif (cmem->nr_ranges >= cmem->max_nr_ranges)\n+\t\t\treturn -ENOMEM;\n \n \t\tcmem->ranges[cmem->nr_ranges].start = start;\n \t\tcmem->ranges[cmem->nr_ranges].end = end - 1;\n \t\tcmem->nr_ranges++;\n \t}\n \n-\t/* Exclude crashkernel region */\n-\tret = crash_exclude_mem_range(cmem, crashk_res.start, crashk_res.end);\n-\tif (ret)\n-\t\tgoto out;\n-\n-\tif (crashk_low_res.end) {\n-\t\tret = crash_exclude_mem_range(cmem, crashk_low_res.start, crashk_low_res.end);\n-\t\tif (ret)\n-\t\t\tgoto out;\n-\t}\n-\n-\tret = crash_prepare_elf64_headers(cmem, true, addr, sz);\n-\n-out:\n-\tkfree(cmem);\n-\treturn ret;\n+\treturn 0;\n }\n #endif\n \n@@ -114,7 +96,7 @@ int load_other_segments(struct kimage *image,\n \tvoid *headers;\n \tunsigned long headers_sz;\n \tif (image->type == KEXEC_TYPE_CRASH) {\n-\t\tret = prepare_elf_headers(&headers, &headers_sz);\n+\t\tret = crash_prepare_headers(true, &headers, &headers_sz, NULL);\n \t\tif (ret) {\n \t\t\tpr_err(\"Preparing elf core header failed\\n\");\n \t\t\tgoto out_err;\n", "prefixes": [ "v12", "09/15" ] }