#ifndef _LINUX_COMPAT_H_
  #define _LINUX_COMPAT_H_
  
  #include <malloc.h>
  #include <linux/types.h>
  #include <linux/err.h>
  
  struct unused {};
  typedef struct unused unused_t;
  
  struct p_current{
         int pid;
  };
  
  extern struct p_current *current;
  
  #define ndelay(x)	udelay(1)
  
  #define dev_dbg(dev, fmt, args...)		\
  	debug(fmt, ##args)
  #define dev_vdbg(dev, fmt, args...)		\
  	debug(fmt, ##args)
  #define dev_info(dev, fmt, args...)		\
  	printf(fmt, ##args)
  #define dev_err(dev, fmt, args...)		\
  	printf(fmt, ##args)
  #define printk	printf
  #define printk_once	printf
  
  #define KERN_EMERG
  #define KERN_ALERT
  #define KERN_CRIT
  #define KERN_ERR
  #define KERN_WARNING
  #define KERN_NOTICE
  #define KERN_INFO
  #define KERN_DEBUG
  
  void *kmalloc(size_t size, int flags);
  void *kzalloc(size_t size, int flags);
  #define vmalloc(size)	kmalloc(size, 0)
  #define __vmalloc(size, flags, pgsz)	kmalloc(size, flags)
  #define kfree(ptr)	free(ptr)
  #define vfree(ptr)	free(ptr)
  
  struct kmem_cache { int sz; };
  
  struct kmem_cache *get_mem(int element_sz);
  #define kmem_cache_create(a, sz, c, d, e)	get_mem(sz)
  void *kmem_cache_alloc(struct kmem_cache *obj, int flag);
  #define kmem_cache_free(obj, size)	free(size)
  #define kmem_cache_destroy(obj)		free(obj)
  
  #define DECLARE_WAITQUEUE(...)	do { } while (0)
  #define add_wait_queue(...)	do { } while (0)
  #define remove_wait_queue(...)	do { } while (0)
  
  #define KERNEL_VERSION(a,b,c)	(((a) << 16) + ((b) << 8) + (c))
  
  #ifndef BUG
  #define BUG() do { \
  	printf("U-Boot BUG at %s:%d!
  ", __FILE__, __LINE__); \
  } while (0)
  
  #define BUG_ON(condition) do { if (condition) BUG(); } while(0)
  #endif /* BUG */
  
  #define WARN_ON(x) if (x) {printf("WARNING in %s line %d
  " \
  				  , __FILE__, __LINE__); }
  
  #define PAGE_SIZE	4096
  
  /* drivers/char/random.c */
  #define get_random_bytes(...)
  
  /* idr.c */
  #define GFP_ATOMIC ((gfp_t) 0)
  #define GFP_KERNEL ((gfp_t) 0)
  #define GFP_NOFS ((gfp_t) 0)
  #define GFP_USER ((gfp_t) 0)
  #define __GFP_NOWARN ((gfp_t) 0)
  
  /* include/linux/leds.h */
  struct led_trigger {};
  
  #define DEFINE_LED_TRIGGER(x)		static struct led_trigger *x;
  enum led_brightness {
  	LED_OFF		= 0,
  	LED_HALF	= 127,
  	LED_FULL	= 255,
  };
  
  static inline void led_trigger_register_simple(const char *name,
  					struct led_trigger **trigger) {}
  static inline void led_trigger_unregister_simple(struct led_trigger *trigger) {}
  static inline void led_trigger_event(struct led_trigger *trigger,
  					enum led_brightness event) {}
  
  /* include/linux/log2.h */
  static inline int is_power_of_2(unsigned long n)
  {
  	return (n != 0 && ((n & (n - 1)) == 0));
  }
  
  /* uapi/linux/limits.h */
  #define XATTR_LIST_MAX 65536	/* size of extended attribute namelist (64k) */
  
  /**
   * The type used for indexing onto a disc or disc partition.
   *
   * Linux always considers sectors to be 512 bytes long independently
   * of the devices real block size.
   *
   * blkcnt_t is the type of the inode's block count.
   */
  #ifdef CONFIG_LBDAF
  typedef u64 sector_t;
  typedef u64 blkcnt_t;
  #else
  typedef unsigned long sector_t;
  typedef unsigned long blkcnt_t;
  #endif
  
  #define ENOTSUPP	524	/* Operation is not supported */
  
  /* module */
  #define THIS_MODULE		0
  #define try_module_get(...)	1
  #define module_put(...)		do { } while (0)
  #define module_init(...)
  #define module_exit(...)
  #define EXPORT_SYMBOL(...)
  #define EXPORT_SYMBOL_GPL(...)
  #define module_param(...)
  #define module_param_call(...)
  #define MODULE_PARM_DESC(...)
  #define MODULE_VERSION(...)
  #define MODULE_DESCRIPTION(...)
  #define MODULE_AUTHOR(...)
  #define MODULE_LICENSE(...)
  #define MODULE_ALIAS(...)
  #define __module_get(...)
  
  /* character device */
  #define MKDEV(...)			0
  #define MAJOR(dev)			0
  #define MINOR(dev)			0
  
  #define alloc_chrdev_region(...)	0
  #define unregister_chrdev_region(...)
  
  #define class_create(...)		__builtin_return_address(0)
  #define class_create_file(...)		0
  #define class_remove_file(...)
  #define class_destroy(...)
  #define misc_register(...)		0
  #define misc_deregister(...)
  
  #define blocking_notifier_call_chain(...) 0
  
  #define __initdata
  #define late_initcall(...)
  
  #define dev_set_name(...)		do { } while (0)
  #define device_register(...)		0
  #define volume_sysfs_init(...)		0
  #define volume_sysfs_close(...)		do { } while (0)
  
  #define init_waitqueue_head(...)	do { } while (0)
  #define wait_event_interruptible(...)	0
  #define wake_up_interruptible(...)	do { } while (0)
  #define print_hex_dump(...)		do { } while (0)
  #define dump_stack(...)			do { } while (0)
  
  #define task_pid_nr(x)			0
  #define set_freezable(...)		do { } while (0)
  #define try_to_freeze(...)		0
  #define set_current_state(...)		do { } while (0)
  #define kthread_should_stop(...)	0
  #define schedule()			do { } while (0)
  
  #define setup_timer(timer, func, data) do {} while (0)
  #define del_timer_sync(timer) do {} while (0)
  #define schedule_work(work) do {} while (0)
  #define INIT_WORK(work, fun) do {} while (0)
  
  struct work_struct {};
  
  unsigned long copy_from_user(void *dest, const void *src,
  			     unsigned long count);
  
  void *vzalloc(unsigned long size);
  
  typedef unused_t spinlock_t;
  typedef int	wait_queue_head_t;
  
  #define spin_lock_init(lock) do {} while (0)
  #define spin_lock(lock) do {} while (0)
  #define spin_unlock(lock) do {} while (0)
  #define spin_lock_irqsave(lock, flags) do { debug("%lu
  ", flags); } while (0)
  #define spin_unlock_irqrestore(lock, flags) do { flags = 0; } while (0)
  
  #define DEFINE_MUTEX(...)
  #define mutex_init(...)
  #define mutex_lock(...)
  #define mutex_unlock(...)
  
  #define init_rwsem(...)			do { } while (0)
  #define down_read(...)			do { } while (0)
  #define down_write(...)			do { } while (0)
  #define down_write_trylock(...)		1
  #define up_read(...)			do { } while (0)
  #define up_write(...)			do { } while (0)
  
  #define cond_resched()			do { } while (0)
  #define yield()				do { } while (0)
  
  #define __init
  #define __exit
  #define __devinit
  #define __devinitdata
  #define __devinitconst
  
  #define kthread_create(...)	__builtin_return_address(0)
  #define kthread_stop(...)	do { } while (0)
  #define wake_up_process(...)	do { } while (0)
  
  struct rw_semaphore { int i; };
  #define down_write(...)			do { } while (0)
  #define up_write(...)			do { } while (0)
  #define down_read(...)			do { } while (0)
  #define up_read(...)			do { } while (0)
  struct device {
  	struct device		*parent;
  	struct class		*class;
  	dev_t			devt;	/* dev_t, creates the sysfs "dev" */
  	void	(*release)(struct device *dev);
  	/* This is used from drivers/usb/musb-new subsystem only */
  	void		*driver_data;	/* data private to the driver */
  	void            *device_data;   /* data private to the device */
  };
  struct mutex { int i; };
  struct kernel_param { int i; };
  
  struct cdev {
  	int owner;
  	dev_t dev;
  };
  #define cdev_init(...)		do { } while (0)
  #define cdev_add(...)		0
  #define cdev_del(...)		do { } while (0)
  
  #define prandom_u32(...)	0
  
  typedef struct {
  	uid_t val;
  } kuid_t;
  
  typedef struct {
  	gid_t val;
  } kgid_t;
  
  /* from include/linux/types.h */
  
  /**
   * struct callback_head - callback structure for use with RCU and task_work
   * @next: next update requests in a list
   * @func: actual update function to call after the grace period.
   */
  struct callback_head {
  	struct callback_head *next;
  	void (*func)(struct callback_head *head);
  };
  #define rcu_head callback_head
  enum writeback_sync_modes {
  	WB_SYNC_NONE,	/* Don't wait on anything */
  	WB_SYNC_ALL,	/* Wait on every mapping */
  };
  
  /* from include/linux/writeback.h */
  /*
   * A control structure which tells the writeback code what to do.  These are
   * always on the stack, and hence need no locking.  They are always initialised
   * in a manner such that unspecified fields are set to zero.
   */
  struct writeback_control {
  	long nr_to_write;		/* Write this many pages, and decrement
  					   this for each page written */
  	long pages_skipped;		/* Pages which were not written */
  
  	/*
  	 * For a_ops->writepages(): if start or end are non-zero then this is
  	 * a hint that the filesystem need only write out the pages inside that
  	 * byterange.  The byte at `end' is included in the writeout request.
  	 */
  	loff_t range_start;
  	loff_t range_end;
  
  	enum writeback_sync_modes sync_mode;
  
  	unsigned for_kupdate:1;		/* A kupdate writeback */
  	unsigned for_background:1;	/* A background writeback */
  	unsigned tagged_writepages:1;	/* tag-and-write to avoid livelock */
  	unsigned for_reclaim:1;		/* Invoked from the page allocator */
  	unsigned range_cyclic:1;	/* range_start is cyclic */
  	unsigned for_sync:1;		/* sync(2) WB_SYNC_ALL writeback */
  };
  
  void *kmemdup(const void *src, size_t len, gfp_t gfp);
  
  typedef int irqreturn_t;
  
  struct timer_list {};
  struct notifier_block {};
  
  typedef unsigned long dmaaddr_t;
  
  #define cpu_relax() do {} while (0)
  
  #define pm_runtime_get_sync(dev) do {} while (0)
  #define pm_runtime_put(dev) do {} while (0)
  #define pm_runtime_put_sync(dev) do {} while (0)
  #define pm_runtime_use_autosuspend(dev) do {} while (0)
  #define pm_runtime_set_autosuspend_delay(dev, delay) do {} while (0)
  #define pm_runtime_enable(dev) do {} while (0)
  
  #define IRQ_NONE 0
  #define IRQ_HANDLED 1
  
  #define dev_set_drvdata(dev, data) do {} while (0)
  
  #define enable_irq(...)
  #define disable_irq(...)
  #define disable_irq_wake(irq) do {} while (0)
  #define enable_irq_wake(irq) -EINVAL
  #define free_irq(irq, data) do {} while (0)
  #define request_irq(nr, f, flags, nm, data) 0
  
  #endif