Root/init/noinitramfs.c

1/*
2 * init/noinitramfs.c
3 *
4 * Copyright (C) 2006, NXP Semiconductors, All Rights Reserved
5 * Author: Jean-Paul Saman <jean-paul.saman@nxp.com>
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; version 2 of the License.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19 */
20#include <linux/init.h>
21#include <linux/stat.h>
22#include <linux/kdev_t.h>
23#include <linux/syscalls.h>
24
25/*
26 * Create a simple rootfs that is similar to the default initramfs
27 */
28static int __init default_rootfs(void)
29{
30    int err;
31
32    err = sys_mkdir("/dev", 0755);
33    if (err < 0)
34        goto out;
35
36    err = sys_mknod((const char __user *) "/dev/console",
37            S_IFCHR | S_IRUSR | S_IWUSR,
38            new_encode_dev(MKDEV(5, 1)));
39    if (err < 0)
40        goto out;
41
42    err = sys_mkdir("/root", 0700);
43    if (err < 0)
44        goto out;
45
46    return 0;
47
48out:
49    printk(KERN_WARNING "Failed to create a rootfs\n");
50    return err;
51}
52rootfs_initcall(default_rootfs);
53

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