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
  13 /*
  14  * Create a simple rootfs that is similar to the default initramfs
  15  */
  16 static int __init default_rootfs(void)
  17 {
  18         int err;
  19
  20         err = ksys_mkdir((const char __user __force *) "/dev", 0755);
  21         if (err < 0)
  22                 goto out;
  23
  24         err = ksys_mknod((const char __user __force *) "/dev/console",
  25                         S_IFCHR | S_IRUSR | S_IWUSR,
  26                         new_encode_dev(MKDEV(5, 1)));
  27         if (err < 0)
  28                 goto out;
  29
  30         err = ksys_mkdir((const char __user __force *) "/root", 0700);
  31         if (err < 0)
  32                 goto out;
  33
  34         return 0;
  35
  36 out:
  37         printk(KERN_WARNING "Failed to create a rootfs\n");
  38         return err;
  39 }
  40 rootfs_initcall(default_rootfs);