diff --git a/man2/mmap2.2 b/man2/mmap2.2
index 74a54355d..0f302ed3c 100644
--- a/man2/mmap2.2
+++ b/man2/mmap2.2
@@ -26,7 +26,7 @@
 .\"	Added description of mmap2
 .\" Modified, 2004-11-25, mtk -- removed stray #endif in prototype
 .\"
-.TH MMAP2 2 2007-06-01 "Linux" "Linux Programmer's Manual"
+.TH MMAP2 2 2007-07-08 "Linux" "Linux Programmer's Manual"
 .SH NAME
 mmap2 \- map files or devices into memory
 .SH SYNOPSIS
@@ -42,38 +42,46 @@ The
 system call operates in exactly the same way as
 .BR mmap (2),
 except that the final argument specifies the offset into the
-file in units of the system page size (instead of bytes).
+file in 4096-byte units (instead of bytes, as is done by
+.BR mmap (2)).
 This enables applications that use a 32-bit
 .I off_t
-to map
-larger files (typically up to 2^44 bytes).
+to map large files (up to 2^44 bytes).
 .SH "RETURN VALUE"
 On success,
 .BR mmap2 ()
 returns a pointer to the mapped area.
-On error \-1 is returned
-and
+On error \-1 is returned and
 .I errno
 is set appropriately.
 .SH ERRORS
 .TP
 .B EFAULT
-Problem with getting the
-data from userspace.
+Problem with getting the data from userspace.
+.TP
+.B EINVAL
+(Various platforms where the page size is not 4096 bytes.)
+.I offset * 4096
+is not a multiple of the system page size.
+.PP
+.BR mmap2 ()
+can return any of the same errors as
+.BR mmap (2).
+.SH VERSIONS
+.BR mmap2 ()
+is available since Linux 2.3.31.
 .SH "CONFORMING TO"
 This system call is Linux specific.
 .SH NOTES
-Glibc does not provide a wrapper for this system call; call it using
-.BR syscall (2).
+Nowadays, the glibc
+.BR mmap ()
+wrapper function invokes this system call rather than the
+.BR mmap (2)
+system call.
 
-.BR mmap2 ()
-is available since Linux 2.3.31.
-It is Linux specific, and should be avoided in portable applications.
-On 32-bit systems,
-.BR mmap2 ()
-is used to implement the
-.BR mmap64 ()
-function that is part of the LFS (Large File Summit).
+On ia64, the unit for
+.I offset
+is actually the system page size, rather than 4096 bytes.
 .SH "SEE ALSO"
 .BR getpagesize (2),
 .BR mmap (2),