From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-12.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 38FB6C43461 for ; Mon, 7 Sep 2020 17:21:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 07B1720658 for ; Mon, 7 Sep 2020 17:21:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730797AbgIGRUg (ORCPT ); Mon, 7 Sep 2020 13:20:36 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:11236 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1729673AbgIGNri (ORCPT ); Mon, 7 Sep 2020 09:47:38 -0400 Received: from DGGEMS404-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id DFEB22355186AC059AD1; Mon, 7 Sep 2020 21:46:58 +0800 (CST) Received: from localhost.localdomain.localdomain (10.175.113.25) by DGGEMS404-HUB.china.huawei.com (10.3.19.204) with Microsoft SMTP Server id 14.3.487.0; Mon, 7 Sep 2020 21:46:49 +0800 From: Chen Zhou To: , , , , , , , , , , CC: , , , , , , , , , , , , Subject: [PATCH v12 3/9] x86: kdump: use macro CRASH_ADDR_LOW_MAX in functions reserve_crashkernel[_low]() Date: Mon, 7 Sep 2020 21:47:39 +0800 Message-ID: <20200907134745.25732-4-chenzhou10@huawei.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200907134745.25732-1-chenzhou10@huawei.com> References: <20200907134745.25732-1-chenzhou10@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.113.25] X-CFilter-Loop: Reflected Sender: linux-doc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-doc@vger.kernel.org To make the functions reserve_crashkernel[_low]() as generic, replace some hard-coded numbers with macro CRASH_ADDR_LOW_MAX. Signed-off-by: Chen Zhou --- arch/x86/kernel/setup.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index d7fd90c52dae..71a6a6e7ca5b 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -430,7 +430,7 @@ static int __init reserve_crashkernel_low(void) unsigned long total_low_mem; int ret; - total_low_mem = memblock_mem_size(1UL << (32 - PAGE_SHIFT)); + total_low_mem = memblock_mem_size(CRASH_ADDR_LOW_MAX >> PAGE_SHIFT); /* crashkernel=Y,low */ ret = parse_crashkernel_low(boot_command_line, total_low_mem, &low_size, &base); @@ -451,7 +451,7 @@ static int __init reserve_crashkernel_low(void) return 0; } - low_base = memblock_find_in_range(CRASH_ALIGN, 1ULL << 32, low_size, CRASH_ALIGN); + low_base = memblock_find_in_range(CRASH_ALIGN, CRASH_ADDR_LOW_MAX, low_size, CRASH_ALIGN); if (!low_base) { pr_err("Cannot reserve %ldMB crashkernel low memory, please try smaller size.\n", (unsigned long)(low_size >> 20)); @@ -504,8 +504,9 @@ static void __init reserve_crashkernel(void) if (!crash_base) { /* * Set CRASH_ADDR_LOW_MAX upper bound for crash memory, - * crashkernel=x,high reserves memory over 4G, also allocates - * 256M extra low memory for DMA buffers and swiotlb. + * crashkernel=x,high reserves memory over CRASH_ADDR_LOW_MAX, + * also allocates 256M extra low memory for DMA buffers + * and swiotlb. * But the extra memory is not required for all machines. * So try low memory first and fall back to high memory * unless "crashkernel=size[KMG],high" is specified. @@ -539,7 +540,7 @@ static void __init reserve_crashkernel(void) return; } - if (crash_base >= (1ULL << 32) && reserve_crashkernel_low()) { + if (crash_base >= CRASH_ADDR_LOW_MAX && reserve_crashkernel_low()) { memblock_free(crash_base, crash_size); return; } -- 2.20.1