From patchwork Mon Jun 7 02:36:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kefeng Wang X-Patchwork-Id: 12302413 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=-14.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, 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 822CFC48BC2 for ; Mon, 7 Jun 2021 02:27:18 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 600AA611CE for ; Mon, 7 Jun 2021 02:27:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230198AbhFGC3I (ORCPT ); Sun, 6 Jun 2021 22:29:08 -0400 Received: from szxga02-in.huawei.com ([45.249.212.188]:4490 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230178AbhFGC3H (ORCPT ); Sun, 6 Jun 2021 22:29:07 -0400 Received: from dggemv703-chm.china.huawei.com (unknown [172.30.72.57]) by szxga02-in.huawei.com (SkyGuard) with ESMTP id 4Fyxyf67zXzZdPf; Mon, 7 Jun 2021 10:24:26 +0800 (CST) Received: from dggpemm500001.china.huawei.com (7.185.36.107) by dggemv703-chm.china.huawei.com (10.3.19.46) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Mon, 7 Jun 2021 10:27:15 +0800 Received: from localhost.localdomain.localdomain (10.175.113.25) by dggpemm500001.china.huawei.com (7.185.36.107) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2176.2; Mon, 7 Jun 2021 10:27:14 +0800 From: Kefeng Wang To: Andrew Morton , CC: , Kefeng Wang , , , , , , , , , , , Subject: [PATCH v3] mm: add setup_initial_init_mm() helper Date: Mon, 7 Jun 2021 10:36:11 +0800 Message-ID: <20210607023611.159804-1-wangkefeng.wang@huawei.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [10.175.113.25] X-ClientProxiedBy: dggems703-chm.china.huawei.com (10.3.19.180) To dggpemm500001.china.huawei.com (7.185.36.107) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org Add setup_initial_init_mm() helper to setup kernel text, data and brk. Cc: linux-snps-arc@lists.infradead.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-csky@vger.kernel.org Cc: uclinux-h8-devel@lists.sourceforge.jp Cc: linux-m68k@lists.linux-m68k.org Cc: openrisc@lists.librecores.org Cc: linuxppc-dev@lists.ozlabs.org Cc: linux-riscv@lists.infradead.org Cc: linux-sh@vger.kernel.org Cc: linux-s390@vger.kernel.org Cc: x86@kernel.org Signed-off-by: Kefeng Wang --- v3: declaration in mm.h, implemention in init-mm.c include/linux/mm.h | 3 +++ mm/init-mm.c | 9 +++++++++ 2 files changed, 12 insertions(+) diff --git a/include/linux/mm.h b/include/linux/mm.h index c274f75efcf9..02aa057540b7 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -244,6 +244,9 @@ int __add_to_page_cache_locked(struct page *page, struct address_space *mapping, #define lru_to_page(head) (list_entry((head)->prev, struct page, lru)) +void setup_initial_init_mm(void *start_code, void *end_code, + void *end_data, void *brk); + /* * Linux kernel virtual memory manager primitives. * The idea being to have a "virtual" mm in the same way diff --git a/mm/init-mm.c b/mm/init-mm.c index 153162669f80..b4a6f38fb51d 100644 --- a/mm/init-mm.c +++ b/mm/init-mm.c @@ -40,3 +40,12 @@ struct mm_struct init_mm = { .cpu_bitmap = CPU_BITS_NONE, INIT_MM_CONTEXT(init_mm) }; + +void setup_initial_init_mm(void *start_code, void *end_code, + void *end_data, void *brk) +{ + init_mm.start_code = (unsigned long)start_code; + init_mm.end_code = (unsigned long)end_code; + init_mm.end_data = (unsigned long)end_data; + init_mm.brk = (unsigned long)brk; +}