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 #include <linux/kconfig.h>
  25 #include <linux/initramfs.h>
  26
  27 /*
  28  * Create a simple rootfs that is similar to the default initramfs
  29  */
  30 #if !IS_BUILTIN(CONFIG_BLK_DEV_INITRD)
  31 static
  32 #endif
  33 int __init default_rootfs(void)
  34 {
  35         int err;
  36
  37         err = sys_mkdir((const char __user __force *) "/dev", 0755);
  38         if (err < 0)
  39                 goto out;
  40
  41         err = sys_mknod((const char __user __force *) "/dev/console",
  42                         S_IFCHR | S_IRUSR | S_IWUSR,
  43                         new_encode_dev(MKDEV(5, 1)));
  44         if (err < 0)
  45                 goto out;
  46
  47         err = sys_mkdir((const char __user __force *) "/root", 0700);
  48         if (err < 0)
  49                 goto out;
  50
  51         return 0;
  52
  53 out:
  54         printk(KERN_WARNING "Failed to create a rootfs\n");
  55         return err;
  56 }
  57 #if !IS_BUILTIN(CONFIG_BLK_DEV_INITRD)
  58 rootfs_initcall(default_rootfs);
  59 #endif