init/noinitramfs.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * init/noinitramfs.c
   4  *
   5  * Copyright (C) 2006, NXP Semiconductors, All Rights Reserved
   6  * Author: Jean-Paul Saman <jean-paul.saman@nxp.com>
   7  */
   8 #include <linux/init.h>
   9 #include <linux/stat.h>
  10 #include <linux/kdev_t.h>
  11 #include <linux/syscalls.h>
  12 #include <linux/init_syscalls.h>
  13 #include <linux/umh.h>
  14
  15 /*
  16  * Create a simple rootfs that is similar to the default initramfs
  17  */
  18 static int __init default_rootfs(void)
  19 {
  20         int err;
  21
  22         usermodehelper_enable();
  23         err = init_mkdir("/dev", 0755);
  24         if (err < 0)
  25                 goto out;
  26
  27         err = init_mknod("/dev/console", S_IFCHR | S_IRUSR | S_IWUSR,
  28                         new_encode_dev(MKDEV(5, 1)));
  29         if (err < 0)
  30                 goto out;
  31
  32         err = init_mkdir("/root", 0700);
  33         if (err < 0)
  34                 goto out;
  35
  36         return 0;
  37
  38 out:
  39         printk(KERN_WARNING "Failed to create a rootfs\n");
  40         return err;
  41 }
  42 rootfs_initcall(default_rootfs);