{"id":2218966,"url":"http://patchwork.ozlabs.org/api/patches/2218966/?format=json","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=json","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=json","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=json","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 ","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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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 ","To":", , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, , ,\n\t, ,\n\t, , ,\n\t, ,\n\t, ,\n\t, ,\n\t, ,\n\t","CC":"","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":"","List-Help":"","List-Owner":"","List-Post":"","List-Archive":",\n ","List-Subscribe":",\n ,\n ","List-Unsubscribe":"","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 \nCc: WANG Xuerui \nReviewed-by: Sourabh Jain \nAcked-by: Baoquan He \nAcked-by: Mike Rapoport (Microsoft) \nSigned-off-by: Jinjie Ruan \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"]}