diff -ur src/sys/amd64/linux32/linux32_machdep.c /home/suleiman/freebsd/src/sys/amd64/linux32/linux32_machdep.c
--- src/sys/amd64/linux32/linux32_machdep.c	Mon Mar 20 13:16:39 2006
+++ /home/suleiman/freebsd/src/sys/amd64/linux32/linux32_machdep.c	Thu Jul 27 16:58:00 2006
@@ -614,7 +614,6 @@
 		int prot;
 		int flags;
 		int fd;
-		long pad;
 		off_t pos;
 	} */ bsd_args;
 	int error;
@@ -712,7 +711,6 @@
 	else
 		bsd_args.fd = linux_args->fd;
 	bsd_args.pos = (off_t)linux_args->pgoff * PAGE_SIZE;
-	bsd_args.pad = 0;
 
 #ifdef DEBUG
 	if (ldebug(mmap))
@@ -908,7 +906,6 @@
 #endif
 
 	sa.fd = args->fd;
-	sa.pad = 0;
 	sa.length = args->length;
 	return ftruncate(td, &sa);
 }
Only in src/sys/arm/conf: GENERIC.hints
diff -ur src/sys/compat/linux/linux_file.c /home/suleiman/freebsd/src/sys/compat/linux/linux_file.c
--- src/sys/compat/linux/linux_file.c	Thu Jul 27 15:19:44 2006
+++ /home/suleiman/freebsd/src/sys/compat/linux/linux_file.c	Thu Jul 27 16:59:26 2006
@@ -155,7 +155,6 @@
 
     struct lseek_args /* {
 	int fd;
-	int pad;
 	off_t offset;
 	int whence;
     } */ tmp_args;
@@ -666,12 +665,10 @@
 {
 	struct ftruncate_args /* {
 		int fd;
-		int pad;
 		off_t length;
 		} */ nuap;
 	   
 	nuap.fd = args->fd;
-	nuap.pad = 0;
 	nuap.length = args->length;
 	return (ftruncate(td, &nuap));
 }
diff -ur src/sys/kern/sys_generic.c /home/suleiman/freebsd/src/sys/kern/sys_generic.c
--- src/sys/kern/sys_generic.c	Thu Jul 27 15:21:21 2006
+++ /home/suleiman/freebsd/src/sys/kern/sys_generic.c	Thu Jul 27 17:05:15 2006
@@ -125,7 +125,6 @@
 	int	fd;
 	void	*buf;
 	size_t	nbyte;
-	int	pad;
 	off_t	offset;
 };
 #endif
@@ -153,6 +152,30 @@
 	return(error);
 }
 
+#ifdef COMPAT_FREEBSD4
+#ifndef _SYS_SYSPROTO_H_
+struct freebsd4_pread_args {
+	int	fd;
+	void	*buf;
+	size_t	nbyte;
+	int	pad;
+	off_t	offset;
+};
+#endif
+int
+freebsd4_pread(struct thread *td, struct freebsd4_pread_args *uap)
+{
+	struct pread_args nuap;
+
+	nuap.fd = uap->fd;
+	nuap.buf = uap->buf;
+	nuap.nbyte = uap->nbyte;
+	nuap.offset = uap->offset;
+
+	return (pread(td, &nuap));
+}
+#endif /* COMPAT_FREEBSD4 */
+
 /*
  * Scatter read system call.
  */
@@ -335,7 +358,6 @@
 	int	fd;
 	const void *buf;
 	size_t	nbyte;
-	int	pad;
 	off_t	offset;
 };
 #endif
@@ -362,6 +384,30 @@
 	error = kern_pwritev(td, uap->fd, &auio, uap->offset);
 	return(error);
 }
+
+#ifdef COMPAT_FREEBSD4
+#ifndef _SYS_SYSPROTO_H_
+struct freebsd4_pwrite_args {
+	int	fd;
+	const void *buf;
+	size_t	nbyte;
+	int	pad;
+	off_t	offset;
+};
+#endif
+int
+freebsd4_pwrite(struct thread *td, struct freebsd4_pwrite_args *uap)
+{
+	struct pwrite_args nuap;
+
+	nuap.fd = uap->fd;
+	nuap.buf = uap->buf;
+	nuap.nbyte = uap->nbyte;
+	nuap.offset = uap->offset;
+
+	return (pwrite(td, &nuap));
+}
+#endif /* COMPAT_FREEBSD4 */
 
 /*
  * Gather write system call
diff -ur src/sys/kern/syscalls.master /home/suleiman/freebsd/src/sys/kern/syscalls.master
--- src/sys/kern/syscalls.master	Thu Jul 27 15:21:21 2006
+++ /home/suleiman/freebsd/src/sys/kern/syscalls.master	Thu Jul 27 16:48:02 2006
@@ -338,10 +338,11 @@
 				    int a4); }
 ; XXX should be	{ int shmsys(int which, ...); }
 172	AUE_NULL	UNIMPL	nosys
-173	AUE_PREAD	MSTD	{ ssize_t pread(int fd, void *buf, \
-				    size_t nbyte, int pad, off_t offset); }
-174	AUE_PWRITE	MSTD	{ ssize_t pwrite(int fd, const void *buf, \
+173	AUE_PREAD	MCOMPAT4	{ ssize_t pread(int fd, void *buf, \
 				    size_t nbyte, int pad, off_t offset); }
+174	AUE_PWRITE	MCOMPAT4	{ ssize_t pwrite(int fd, \
+				    const void *buf, size_t nbyte, int pad, \
+				    off_t offset); }
 175	AUE_NULL	UNIMPL	nosys
 176	AUE_ADJTIME	MSTD	{ int ntp_adjtime(struct timex *tp); }
 177	AUE_NULL	UNIMPL	sfork (BSD/OS 2.x)
@@ -371,16 +372,16 @@
 				    __setrlimit_args int
 196	AUE_GETDIRENTRIES	MSTD	{ int getdirentries(int fd, char *buf, \
 				    u_int count, long *basep); }
-197	AUE_MMAP	MSTD	{ caddr_t mmap(caddr_t addr, size_t len, \
-				    int prot, int flags, int fd, int pad, \
-				    off_t pos); }
+197	AUE_MMAP	MCOMPAT4	{ caddr_t mmap(caddr_t addr, \
+				    size_t len, int prot, int flags, int fd, \
+				    int pad, off_t pos); }
 198	AUE_NULL	MSTD	{ int nosys(void); } __syscall \
 				    __syscall_args int
-199	AUE_LSEEK	MSTD	{ off_t lseek(int fd, int pad, off_t offset, \
-				    int whence); }
-200	AUE_TRUNCATE	MSTD	{ int truncate(char *path, int pad, \
+199	AUE_LSEEK	MCOMPAT4	{ off_t lseek(int fd, int pad, \
+				    off_t offset, int whence); }
+200	AUE_TRUNCATE	MCOMPAT4	{ int truncate(char *path, int pad, \
 				    off_t length); }
-201	AUE_FTRUNCATE	MSTD	{ int ftruncate(int fd, int pad, \
+201	AUE_FTRUNCATE	MCOMPAT4	{ int ftruncate(int fd, int pad, \
 				    off_t length); }
 202	AUE_SYSCTL	MSTD	{ int __sysctl(int *name, u_int namelen, \
 				    void *old, size_t *oldlenp, void *new, \
@@ -831,5 +832,16 @@
 468	AUE_NULL	MSTD	{ int thr_setschedparam(long id, \
 				    const struct sched_param *param, \
 				    int param_size); }
+469	AUE_PREAD	MSTD	{ ssize_t pread(int fd, void *buf, \
+				    size_t nbyte, off_t offset); }
+470	AUE_PWRITE	MSTD	{ ssize_t pwrite(int fd, const void *buf, \
+				    size_t nbyte, off_t offset); }
+471	AUE_MMAP	MSTD	{ caddr_t mmap(caddr_t addr, size_t len, \
+				    int prot, int flags, int fd, off_t pos); }
+472	AUE_LSEEK	MSTD	{ off_t lseek(int fd, off_t offset, \
+ 				    int whence); }
+473	AUE_TRUNCATE	MSTD	{ int truncate(char *path, off_t length); }
+474	AUE_FTRUNCATE	MSTD	{ int ftruncate(int fd, off_t length); }
+
 ; Please copy any additions and changes to the following compatability tables:
 ; sys/compat/freebsd32/syscalls.master
diff -ur src/sys/kern/vfs_syscalls.c /home/suleiman/freebsd/src/sys/kern/vfs_syscalls.c
--- src/sys/kern/vfs_syscalls.c	Thu Jul 27 15:21:23 2006
+++ /home/suleiman/freebsd/src/sys/kern/vfs_syscalls.c	Thu Jul 27 17:04:04 2006
@@ -1713,7 +1713,6 @@
 #ifndef _SYS_SYSPROTO_H_
 struct lseek_args {
 	int	fd;
-	int	pad;
 	off_t	offset;
 	int	whence;
 };
@@ -1723,7 +1722,6 @@
 	struct thread *td;
 	register struct lseek_args /* {
 		int fd;
-		int pad;
 		off_t offset;
 		int whence;
 	} */ *uap;
@@ -1809,7 +1807,6 @@
 {
 	struct lseek_args /* {
 		int fd;
-		int pad;
 		off_t offset;
 		int whence;
 	} */ nuap;
@@ -2998,7 +2995,6 @@
 #ifndef _SYS_SYSPROTO_H_
 struct truncate_args {
 	char	*path;
-	int	pad;
 	off_t	length;
 };
 #endif
@@ -3007,7 +3003,6 @@
 	struct thread *td;
 	register struct truncate_args /* {
 		char *path;
-		int pad;
 		off_t length;
 	} */ *uap;
 {
@@ -3064,7 +3059,6 @@
 #ifndef _SYS_SYSPROTO_H_
 struct ftruncate_args {
 	int	fd;
-	int	pad;
 	off_t	length;
 };
 #endif
@@ -3073,7 +3067,6 @@
 	struct thread *td;
 	register struct ftruncate_args /* {
 		int fd;
-		int pad;
 		off_t length;
 	} */ *uap;
 {
@@ -3140,7 +3133,6 @@
 {
 	struct truncate_args /* {
 		char *path;
-		int pad;
 		off_t length;
 	} */ nuap;
 
@@ -3168,7 +3160,6 @@
 {
 	struct ftruncate_args /* {
 		int fd;
-		int pad;
 		off_t length;
 	} */ nuap;
 
@@ -5085,3 +5076,58 @@
 	VFS_UNLOCK_GIANT(vfslocked);
 	return (error);
 }
+
+#ifdef COMPAT_FREEBSD4
+
+#ifndef _SYS_SYSPROTO_H_
+struct freebsd4_lseek_args {
+	int fd;
+	int pad;
+	off_t offset;
+	int whence;
+};
+#endif
+int
+freebsd4_lseek(struct thread *td, struct freebsd4_lseek_args *uap)
+{
+	struct lseek_args nuap;
+
+	nuap.fd = uap->fd;
+	nuap.offset = uap->offset;
+	nuap.whence = uap->whence;
+
+	return (lseek(td, &nuap));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct freebsd4_truncate_args {
+	char	*path;
+	int	pad;
+	off_t	length;
+};
+#endif
+int
+freebsd4_truncate(struct thread *td, struct freebsd4_truncate_args *uap)
+{
+	return (kern_truncate(td, uap->path, UIO_USERSPACE, uap->length));
+}
+
+#ifndef _SYS_SYSPROTO_H_
+struct freebsd4_ftruncate_args {
+	int	fd;
+	int	pad;
+	off_t	length;
+};
+#endif
+int
+freebsd4_ftruncate(struct thread *td, struct freebsd4_ftruncate_args *uap)
+{
+	struct ftruncate_args nuap;
+
+	nuap.fd = uap->fd;
+	nuap.length = uap->length;
+
+	return (ftruncate(td, &nuap));
+}
+
+#endif /* COMPAT_FREEBSD4 */
diff -ur src/sys/vm/vm_mmap.c /home/suleiman/freebsd/src/sys/vm/vm_mmap.c
--- src/sys/vm/vm_mmap.c	Thu Jul 27 15:21:36 2006
+++ /home/suleiman/freebsd/src/sys/vm/vm_mmap.c	Thu Jul 27 17:06:47 2006
@@ -193,7 +193,6 @@
 	int prot;
 	int flags;
 	int fd;
-	long pad;
 	off_t pos;
 };
 #endif
@@ -443,6 +442,33 @@
 }
 #endif				/* COMPAT_43 */
 
+#ifdef COMPAT_FREEBSD4
+#ifndef _SYS_SYSPROTO_H_
+struct freebsd4_mmap_args {
+	void *addr;
+	size_t len;
+	int prot;
+	int flags;
+	int fd;
+	int pad;
+	off_t pos;
+};
+#endif
+int
+freebsd4_mmap(struct thread *td, struct freebsd4_mmap_args *uap)
+{
+	struct mmap_args nuap;
+
+	nuap.addr = uap->addr;
+	nuap.len = uap->len;
+	nuap.prot = uap->prot;
+	nuap.flags = uap->flags;
+	nuap.fd = uap->fd;
+	nuap.pos = uap->pos;
+
+	return (mmap(td, &nuap));
+}
+#endif /* COMPAT_FREEBSD4 */
 
 #ifndef _SYS_SYSPROTO_H_
 struct msync_args {
diff -ur src/lib/libc/sys/Makefile.inc /home/suleiman/freebsd/src/lib/libc/sys/Makefile.inc
--- src/lib/libc/sys/Makefile.inc	Mon Mar 20 13:15:47 2006
+++ /home/suleiman/freebsd/src/lib/libc/sys/Makefile.inc	Thu Jul 27 17:09:30 2006
@@ -18,7 +18,7 @@
 .endif
 
 # Sources common to both syscall interfaces:
-SRCS+=	ftruncate.c lseek.c mmap.c pread.c pwrite.c truncate.c  __error.c
+SRCS+=	__error.c
 
 # Add machine dependent asm sources:
 SRCS+=${MDASM}