#ifndef _LINUX_COMPAT_H
  #define _LINUX_COMPAT_H
  /*
   * These are the type definitions for the architecture specific
   * syscall compatibility layer.
   */

  
  #ifdef CONFIG_COMPAT
  
  #include <linux/stat.h>
  #include <linux/param.h>	/* for HZ */
  #include <linux/sem.h>
  
  #include <asm/compat.h>
  #include <asm/siginfo.h>

  #include <asm/signal.h>

  
  #define compat_jiffies_to_clock_t(x)	\
  		(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)

  typedef __compat_uid32_t	compat_uid_t;
  typedef __compat_gid32_t	compat_gid_t;

  struct rusage;
  
  struct compat_itimerspec { 
  	struct compat_timespec it_interval;
  	struct compat_timespec it_value;
  };
  
  struct compat_utimbuf {
  	compat_time_t		actime;
  	compat_time_t		modtime;
  };
  
  struct compat_itimerval {
  	struct compat_timeval	it_interval;
  	struct compat_timeval	it_value;
  };
  
  struct compat_tms {
  	compat_clock_t		tms_utime;
  	compat_clock_t		tms_stime;
  	compat_clock_t		tms_cutime;
  	compat_clock_t		tms_cstime;
  };

  struct compat_timex {
  	compat_uint_t modes;
  	compat_long_t offset;
  	compat_long_t freq;
  	compat_long_t maxerror;
  	compat_long_t esterror;
  	compat_int_t status;
  	compat_long_t constant;
  	compat_long_t precision;
  	compat_long_t tolerance;
  	struct compat_timeval time;
  	compat_long_t tick;
  	compat_long_t ppsfreq;
  	compat_long_t jitter;
  	compat_int_t shift;
  	compat_long_t stabil;
  	compat_long_t jitcnt;
  	compat_long_t calcnt;
  	compat_long_t errcnt;
  	compat_long_t stbcnt;

  	compat_int_t tai;

  
  	compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;
  	compat_int_t :32; compat_int_t :32; compat_int_t :32; compat_int_t :32;

  	compat_int_t :32; compat_int_t :32; compat_int_t :32;

  };

  #define _COMPAT_NSIG_WORDS	(_COMPAT_NSIG / _COMPAT_NSIG_BPW)
  
  typedef struct {
  	compat_sigset_word	sig[_COMPAT_NSIG_WORDS];
  } compat_sigset_t;

  extern int get_compat_timespec(struct timespec *, const struct compat_timespec __user *);
  extern int put_compat_timespec(const struct timespec *, struct compat_timespec __user *);
  
  struct compat_iovec {
  	compat_uptr_t	iov_base;
  	compat_size_t	iov_len;
  };
  
  struct compat_rlimit {
  	compat_ulong_t	rlim_cur;
  	compat_ulong_t	rlim_max;
  };
  
  struct compat_rusage {
  	struct compat_timeval ru_utime;
  	struct compat_timeval ru_stime;
  	compat_long_t	ru_maxrss;
  	compat_long_t	ru_ixrss;
  	compat_long_t	ru_idrss;
  	compat_long_t	ru_isrss;
  	compat_long_t	ru_minflt;
  	compat_long_t	ru_majflt;
  	compat_long_t	ru_nswap;
  	compat_long_t	ru_inblock;
  	compat_long_t	ru_oublock;
  	compat_long_t	ru_msgsnd;
  	compat_long_t	ru_msgrcv;
  	compat_long_t	ru_nsignals;
  	compat_long_t	ru_nvcsw;
  	compat_long_t	ru_nivcsw;
  };
  
  extern int put_compat_rusage(const struct rusage *, struct compat_rusage __user *);
  
  struct compat_siginfo;
  
  extern asmlinkage long compat_sys_waitid(int, compat_pid_t,
  		struct compat_siginfo __user *, int,
  		struct compat_rusage __user *);
  
  struct compat_dirent {
  	u32		d_ino;
  	compat_off_t	d_off;
  	u16		d_reclen;
  	char		d_name[256];
  };
  
  typedef union compat_sigval {
  	compat_int_t	sival_int;
  	compat_uptr_t	sival_ptr;
  } compat_sigval_t;
  
  #define COMPAT_SIGEV_PAD_SIZE	((SIGEV_MAX_SIZE/sizeof(int)) - 3)
  
  typedef struct compat_sigevent {
  	compat_sigval_t sigev_value;
  	compat_int_t sigev_signo;
  	compat_int_t sigev_notify;
  	union {
  		compat_int_t _pad[COMPAT_SIGEV_PAD_SIZE];
  		compat_int_t _tid;
  
  		struct {
  			compat_uptr_t _function;
  			compat_uptr_t _attribute;
  		} _sigev_thread;
  	} _sigev_un;
  } compat_sigevent_t;

  struct compat_robust_list {
  	compat_uptr_t			next;
  };
  
  struct compat_robust_list_head {
  	struct compat_robust_list	list;
  	compat_long_t			futex_offset;
  	compat_uptr_t			list_op_pending;
  };
  
  extern void compat_exit_robust_list(struct task_struct *curr);
  
  asmlinkage long
  compat_sys_set_robust_list(struct compat_robust_list_head __user *head,
  			   compat_size_t len);
  asmlinkage long

  compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,

  			   compat_size_t __user *len_ptr);

  
  long compat_sys_semctl(int first, int second, int third, void __user *uptr);
  long compat_sys_msgsnd(int first, int second, int third, void __user *uptr);
  long compat_sys_msgrcv(int first, int second, int msgtyp, int third,
  		int version, void __user *uptr);
  long compat_sys_msgctl(int first, int second, void __user *uptr);
  long compat_sys_shmat(int first, int second, compat_uptr_t third, int version,
  		void __user *uptr);
  long compat_sys_shmctl(int first, int second, void __user *uptr);
  long compat_sys_semtimedop(int semid, struct sembuf __user *tsems,
  		unsigned nsems, const struct compat_timespec __user *timeout);
  asmlinkage long compat_sys_keyctl(u32 option,
  			      u32 arg2, u32 arg3, u32 arg4, u32 arg5);
  
  asmlinkage ssize_t compat_sys_readv(unsigned long fd,
  		const struct compat_iovec __user *vec, unsigned long vlen);
  asmlinkage ssize_t compat_sys_writev(unsigned long fd,
  		const struct compat_iovec __user *vec, unsigned long vlen);
  
  int compat_do_execve(char * filename, compat_uptr_t __user *argv,
  	        compat_uptr_t __user *envp, struct pt_regs * regs);
  
  asmlinkage long compat_sys_select(int n, compat_ulong_t __user *inp,
  		compat_ulong_t __user *outp, compat_ulong_t __user *exp,
  		struct compat_timeval __user *tvp);

  asmlinkage long compat_sys_wait4(compat_pid_t pid,

  				 compat_uint_t __user *stat_addr, int options,
  				 struct compat_rusage __user *ru);

  #define BITS_PER_COMPAT_LONG    (8*sizeof(compat_long_t))
  
  #define BITS_TO_COMPAT_LONGS(bits) \
  	(((bits)+BITS_PER_COMPAT_LONG-1)/BITS_PER_COMPAT_LONG)

  long compat_get_bitmap(unsigned long *mask, const compat_ulong_t __user *umask,

  		       unsigned long bitmap_size);
  long compat_put_bitmap(compat_ulong_t __user *umask, unsigned long *mask,
  		       unsigned long bitmap_size);
  int copy_siginfo_from_user32(siginfo_t *to, struct compat_siginfo __user *from);
  int copy_siginfo_to_user32(struct compat_siginfo __user *to, siginfo_t *from);
  int get_compat_sigevent(struct sigevent *event,
  		const struct compat_sigevent __user *u_event);

  static inline int compat_timeval_compare(struct compat_timeval *lhs,
  					struct compat_timeval *rhs)
  {
  	if (lhs->tv_sec < rhs->tv_sec)
  		return -1;
  	if (lhs->tv_sec > rhs->tv_sec)
  		return 1;
  	return lhs->tv_usec - rhs->tv_usec;
  }
  
  static inline int compat_timespec_compare(struct compat_timespec *lhs,
  					struct compat_timespec *rhs)
  {
  	if (lhs->tv_sec < rhs->tv_sec)
  		return -1;
  	if (lhs->tv_sec > rhs->tv_sec)
  		return 1;
  	return lhs->tv_nsec - rhs->tv_nsec;
  }

  extern int get_compat_itimerspec(struct itimerspec *dst,
  				 const struct compat_itimerspec __user *src);
  extern int put_compat_itimerspec(struct compat_itimerspec __user *dst,
  				 const struct itimerspec *src);

  asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
  		struct timezone __user *tz);
  asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
  		struct timezone __user *tz);

  asmlinkage long compat_sys_adjtimex(struct compat_timex __user *utp);

  extern int compat_printk(const char *fmt, ...);

  extern void sigset_from_compat(sigset_t *set, compat_sigset_t *compat);

  asmlinkage long compat_sys_migrate_pages(compat_pid_t pid,
  		compat_ulong_t maxnode, const compat_ulong_t __user *old_nodes,
  		const compat_ulong_t __user *new_nodes);

  extern int compat_ptrace_request(struct task_struct *child,
  				 compat_long_t request,
  				 compat_ulong_t addr, compat_ulong_t data);

  #ifdef __ARCH_WANT_COMPAT_SYS_PTRACE
  extern long compat_arch_ptrace(struct task_struct *child, compat_long_t request,
  			       compat_ulong_t addr, compat_ulong_t data);
  asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
  				  compat_long_t addr, compat_long_t data);
  #endif	/* __ARCH_WANT_COMPAT_SYS_PTRACE */

  /*
   * epoll (fs/eventpoll.c) compat bits follow ...
   */

  struct epoll_event;
  #define compat_epoll_event	epoll_event

  asmlinkage long compat_sys_epoll_pwait(int epfd,
  			struct compat_epoll_event __user *events,
  			int maxevents, int timeout,
  			const compat_sigset_t __user *sigmask,
  			compat_size_t sigsetsize);

  asmlinkage long compat_sys_utimensat(unsigned int dfd, char __user *filename,
  				struct compat_timespec __user *t, int flags);

  asmlinkage long compat_sys_signalfd(int ufd,
  				const compat_sigset_t __user *sigmask,
                                  compat_size_t sigsetsize);

  asmlinkage long compat_sys_timerfd_settime(int ufd, int flags,
  				   const struct compat_itimerspec __user *utmr,
  				   struct compat_itimerspec __user *otmr);
  asmlinkage long compat_sys_timerfd_gettime(int ufd,
  				   struct compat_itimerspec __user *otmr);

  #endif /* CONFIG_COMPAT */
  #endif /* _LINUX_COMPAT_H */