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  */
  28 static int __init default_rootfs(void)
  29 {
  30         int err;
  31
  32         err = sys_mkdir((const char __user __force *) "/dev", 0755);
  33         if (err < 0)
  34                 goto out;
  35
  36         err = sys_mknod((const char __user __force *) "/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((const char __user __force *) "/root", 0700);
  43         if (err < 0)
  44                 goto out;
  45
  46         return 0;
  47
  48 out:
  49         printk(KERN_WARNING "Failed to create a rootfs\n");
  50         return err;
  51 }
  52 rootfs_initcall(default_rootfs);