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GET /api/patches/2218966/?format=api
{ "id": 2218966, "url": "http://patchwork.ozlabs.org/api/patches/2218966/?format=api", "web_url": "http://patchwork.ozlabs.org/project/linuxppc-dev/patch/20260402072701.628293-13-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": "<20260402072701.628293-13-ruanjinjie@huawei.com>", "list_archive_url": "https://lore.kernel.org/linuxppc-dev/20260402072701.628293-13-ruanjinjie@huawei.com/", "date": "2026-04-02T07:26:58", "name": "[v12,12/15] LoongArch: kexec: Use crash_prepare_headers() helper to simplify code", "commit_ref": null, "pull_url": null, "state": "handled-elsewhere", "archived": false, "hash": "a1101d273eceb4d96787abf23345bd707b00f5db", "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/20260402072701.628293-13-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/2218966/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2218966/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "\n <linuxppc-dev+bounces-19203-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=EiEbnqQU;\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 15:26:18 +0800" ], "ARC-Seal": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707; t=1775114785;\n\tcv=none;\n b=JubZTKB0v0nHSNEF3ycZXA0TCLowSsreTy9sHSWgajpIMs1nn13JmPliWYVYEHiDYWZQeeJEEgNIRQhWadERq8k8h/U6Dbwv6iBdIZZX8QzaGGk0cttadCyXEOWD8j2Whji7bLyK8bEkPm7fzYTBIN9ojWTYlSpsfZh2WfCCU+bZskHOfP3NlhZKt5RBpOePtHjl4n1UyETkjQT6tppNSXdYKTCH/gEA99Xz6WF98LPusE0q+f8ukaQ710IotMkAvhl7XuTPQsyjNdIQ3udQeTNzEHJh4svLq0QxsUxDcjJ+TkodPe924vjVCBZyBwr+S36x9ahGcI52NDHhDmfBAA==", "ARC-Message-Signature": "i=1; a=rsa-sha256; d=lists.ozlabs.org; s=201707;\n\tt=1775114785; c=relaxed/relaxed;\n\tbh=arGtLSYVMJnA8Jj6p3DzGt8cbJyT3GiVPFMXgPgtn5c=;\n\th=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References:\n\t MIME-Version:Content-Type;\n b=QtdC64wGTS2vN6uyUVzQWZMrOHMJoLx0DPS1zaoJV8lzIwtqfSaSlK3PKTed/FEEE79iwU6AqmUUxmQXEPrTkqLKfqPukt0Zy8co+8/LBB4/ms7hCZJBDF+3hJzxugBeH2Iw9faf4xez9jUn00HmA6NJEzWEUKCvQwZ3VERBtUaBjpFoNkp19YX82OzZM6ApB7htKC2nOgnChsBVBAGAdldgxACiaYCkK4R4/soQEk4rNiPacrSiwJ+0scvP15yZlsAjaQc84GBKQ/PjE9ZzkbCmaRk1ywsBeQxlJYMpBUdVciD+UPukWN/wbxNFGI1BwlxF1uLOkYoYgss99Y0JZQ==", "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=EiEbnqQU; dkim-atps=neutral;\n spf=pass (client-ip=113.46.200.221; helo=canpmsgout06.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=arGtLSYVMJnA8Jj6p3DzGt8cbJyT3GiVPFMXgPgtn5c=;\n\tb=EiEbnqQUhIhamDHQUhbfbnTNWxE7tuEb0TXsVY6BiKUtF9bK/ziaPVhV0yi9BgVoDuooO5TpA\n\tsJWye9fu1EO362BcR9zRzuw28HbNbKyUJ2/ByF0rEj/mkWP3IV/syNKgdWS2Pf0ik0JI4sE6Eqp\n\tAZhHgjpzPaop/12xLxrOwnY=", "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 12/15] LoongArch: kexec: Use crash_prepare_headers()\n helper to simplify code", "Date": "Thu, 2 Apr 2026 15:26:58 +0800", "Message-ID": "<20260402072701.628293-13-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 kernel\nmemory 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\nCc: Huacai Chen <chenhuacai@kernel.org>\nCc: WANG Xuerui <kernel@xen0n.name>\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/loongarch/kernel/machine_kexec_file.c | 46 +++++++---------------\n 1 file changed, 14 insertions(+), 32 deletions(-)", "diff": "diff --git a/arch/loongarch/kernel/machine_kexec_file.c b/arch/loongarch/kernel/machine_kexec_file.c\nindex 167392c1da33..3d0386ee18ef 100644\n--- a/arch/loongarch/kernel/machine_kexec_file.c\n+++ b/arch/loongarch/kernel/machine_kexec_file.c\n@@ -56,51 +56,33 @@ static void cmdline_add_initrd(struct kimage *image, unsigned long *cmdline_tmpl\n }\n \n #ifdef CONFIG_CRASH_DUMP\n-\n-static int prepare_elf_headers(void **addr, unsigned long *sz)\n+unsigned int arch_get_system_nr_ranges(void)\n {\n-\tint ret, nr_ranges;\n-\tuint64_t i;\n+\tint nr_ranges = 2; /* for exclusion of crashkernel region */\n \tphys_addr_t start, end;\n-\tstruct crash_mem *cmem;\n+\tuint64_t 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+\tuint64_t 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 < 0)\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 < 0)\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 \n /*\n@@ -168,7 +150,7 @@ int load_other_segments(struct kimage *image,\n \t\tvoid *headers;\n \t\tunsigned long headers_sz;\n \n-\t\tret = prepare_elf_headers(&headers, &headers_sz);\n+\t\tret = crash_prepare_headers(true, &headers, &headers_sz, NULL);\n \t\tif (ret < 0) {\n \t\t\tpr_err(\"Preparing elf core header failed\\n\");\n \t\t\tgoto out_err;\n", "prefixes": [ "v12", "12/15" ] }