diff --git a/man2/getunwind.2 b/man2/getunwind.2
index 968e7f8a8..560d517f1 100644
--- a/man2/getunwind.2
+++ b/man2/getunwind.2
@@ -1,5 +1,6 @@
 .\" Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
 .\" Written by Marcela Maslanova <mmaslano@redhat.com>
+.\" and Copyright 2013, Michael kerrisk <mtk.manpages@gmail.com>
 .\"
 .\" Permission is granted to make and distribute verbatim copies of this
 .\" manual provided the copyright notice and this permission notice are
@@ -22,7 +23,7 @@
 .\" the source, must acknowledge the copyright and authors of this work.
 .\"
 .\"
-.TH GETUNWIND 2 "29 August 2006" Linux "Linux System Calls"
+.TH GETUNWIND 2 2013-02-13" Linux "Linux Programmer's Manual"
 .SH NAME
 getunwind \- copy the unwind data to caller's buffer
 
@@ -31,23 +32,39 @@ getunwind \- copy the unwind data to caller's buffer
 .B #include <syscall.h>
 .B #include <linux/unwind.h>
 .sp
-.BI "long getunwind (void " *buf ", size_t " buf_size );
+.BI "long getunwind(void " *buf ", size_t " buf_size );
 .fi
+
+.IR Note :
+There is no glibc wrapper for this system call; see NOTES.
 .SH DESCRIPTION
+.I Note: this function is obsolete.
+
 The
-.B sys_getunwind
-function returns size of unwind table, which describes gate page (kernel code that
+IA-64-specific
+.BR getunwind ()
+system call copies the kernel's call frame
+unwind data into the buffer pointed to by
+.I buf
+and returns the size of the unwind data;
+this data describes the gate page (kernel code that
 is mapped into user space).
 
-The unwind data is copied to the buffer \fIbuf\fR, which has size \fIbuf_size\fR.
-The data is copied
-only if \fIbuf_size\fR is greater than or equal to the size of the 
-unwind data and \fIbuf\fR is not NULL.
-The system call returns the size of the unwind data in both cases.
+The size of the buffer
+.I buf
+is specified in
+.IR buf_size .
+The data is copied only if
+.I buf_size
+is greater than or equal to the size of the unwind data and
+.I buf
+is not NULL;
+otherwise, no data is copied, and the call succeeds,
+returning the size that would be needed to store the unwind data.
 
 The first part of the unwind data contains an unwind table. 
-The rest contains the associated unwind info in random order.
-The unwind table contains a table looking like:
+The rest contains the associated unwind information, in no particular order.
+The unwind table contains entries of the following form:
 
 .nf
 	u64 start;      (64-bit address of start of function)
@@ -55,37 +72,47 @@ The unwind table contains a table looking like:
 	u64 info;       (BUF-relative offset to unwind info)
 .fi
 
-An entry with a START address of zero is the end of table.
-For more information about the format you can see the IA-64 
-Software Conventions and Runtime Architecture.
+An entry whose
+.I sytart
+value is zero indicates the end of the table.
+For more information about the format, see the
+.I IA-64 Software Conventions and Runtime Architecture
+manual.
 
 .SH "RETURN VALUE"
-The
-.B sys_getunwind
-function returns size of unwind table.
+On success,
+.BR getunwind ()
+returns the size of unwind table.
+On error, \-1 is returned and
+.I errno
+is set to indicate the error.
 
 .SH ERRORS
-The
-.B sys_getunwind
-function fails with
+.BR getunwind ()
+fails with the error
 .B EFAULT
 if the unwind info can't be stored in the space specified by
-the
-.I buf 
-argument.
+.IR buf . 
 
-.SH AVAILABILITY
-This system call is available only on the IA-64 architecture.
+.SH VERSIONS
+This system call is available since Linux 2.4.
 
-.SH APPLICATION USAGE
-This system call has been deprecated. It's highly recommended to get at the kernel's
-unwind info by the gate DSO. The address of the ELF header for this DSO
-is passed to user level via AT_SYSINFO_EHDR.
+.SH CONFORMING TO
+This system call is Linux specific,
+and is available only on the IA-64 architecture.
 
-The system call is not available to application programs as a function;
-it can be called using the
-.BR syscall (2)
-function.
+.SH NOTES
+This system call has been deprecated.
+The modern way to obtain the kernel's unwind data is via the gate DSO.
+The address of the ELF header for this DSO
+is passed to user level via
+.BR AT_SYSINFO_EHDR
+(see
+.BR getauxval (3)).
+
+Glibc does not provide a wrapper for this system call;
+in the unlikely event that you want to call it, use
+.BR syscall (2).
 
 .SH "SEE ALSO"
-.BR syscall(2),
+.BR getauxval (3)