linux-kernel - [PATCH v2 01/15] mm: add setup_initial_init

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Message-ID: <20210604070633.32363-2-wangkefeng.wang@huawei.com>
Date:   Fri, 4 Jun 2021 15:06:19 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        <linux-kernel@...r.kernel.org>
CC:     <linux-mm@...ck.org>, Kefeng Wang <wangkefeng.wang@...wei.com>,
        <linux-snps-arc@...ts.infradead.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-csky@...r.kernel.org>,
        <uclinux-h8-devel@...ts.sourceforge.jp>,
        <linux-m68k@...ts.linux-m68k.org>, <openrisc@...ts.librecores.org>,
        <linuxppc-dev@...ts.ozlabs.org>, <linux-riscv@...ts.infradead.org>,
        <linux-sh@...r.kernel.org>, <linux-s390@...r.kernel.org>,
        <x86@...nel.org>
Subject: [PATCH v2 01/15] mm: add setup_initial_init_mm() helper

Add setup_initial_init_mm() helper to setup kernel text,
data and brk.

Cc: linux-snps-arc@...ts.infradead.org
Cc: linux-arm-kernel@...ts.infradead.org
Cc: linux-csky@...r.kernel.org
Cc: uclinux-h8-devel@...ts.sourceforge.jp
Cc: linux-m68k@...ts.linux-m68k.org
Cc: openrisc@...ts.librecores.org
Cc: linuxppc-dev@...ts.ozlabs.org
Cc: linux-riscv@...ts.infradead.org
Cc: linux-sh@...r.kernel.org
Cc: linux-s390@...r.kernel.org
Cc: x86@...nel.org
Signed-off-by: Kefeng Wang <wangkefeng.wang@...wei.com>
---
 include/linux/mm_types.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 5aacc1c10a45..e1d2429089a4 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -572,6 +572,14 @@ struct mm_struct {
 };
 
 extern struct mm_struct init_mm;
+static inline 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;
+}
 
 /* Pointer magic because the dynamic array size confuses some compilers. */
 static inline void mm_init_cpumask(struct mm_struct *mm)
-- 
2.26.2