diff --git a/include/linux/compat.h b/include/linux/compat.h
new file mode 100644
index 0000000..b58b7d6
--- /dev/null
+++ b/include/linux/compat.h
@@ -0,0 +1,162 @@
+#ifndef _LINUX_COMPAT_H
+#define _LINUX_COMPAT_H
+/*
+ * These are the type definitions for the architecture specific
+ * syscall compatibility layer.
+ */
+#include <linux/config.h>
+
+#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>
+
+#define compat_jiffies_to_clock_t(x)	\
+		(((unsigned long)(x) * COMPAT_USER_HZ) / HZ)
+
+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;
+};
+
+#define _COMPAT_NSIG_WORDS	(_COMPAT_NSIG / _COMPAT_NSIG_BPW)
+
+typedef struct {
+	compat_sigset_word	sig[_COMPAT_NSIG_WORDS];
+} compat_sigset_t;
+
+extern int cp_compat_stat(struct kstat *, struct compat_stat __user *);
+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;
+
+
+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);
+
+#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, 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);
+
+#endif /* CONFIG_COMPAT */
+#endif /* _LINUX_COMPAT_H */