diff --git a/man2/posix_fadvise.2 b/man2/posix_fadvise.2
index b7f4dbf78..d6fd1f99f 100644
--- a/man2/posix_fadvise.2
+++ b/man2/posix_fadvise.2
@@ -22,6 +22,7 @@
 .\" the source, must acknowledge the copyright and authors of this work.
 .\"
 .\" 2005-04-08 mtk, noted kernel version and added BUGS
+.\" 2010-10-09, mtk, document arm_fadvise64_64()
 .\"
 .TH POSIX_FADVISE 2 2010-10-09 "Linux" "Linux Programmer's Manual"
 .SH NAME
@@ -148,6 +149,30 @@ call
 or
 .BR fdatasync (2)
 first.
+.SS arm_fadvise()
+The ARM architecture
+needs 64-bit arguments to be aligned in a suitable pair of registers.
+On this architecture, the call signature of
+.BR posix_fadvise ()
+is flawed, since it forces a register to be wasted as padding between the
+.I fd
+and
+.I len
+arguments.
+Therefore, since Linux 2.6.14, ARM defines a different
+system call that orders the arguments suitably:
+.PP
+.in +4n
+.nf
+.BI "long arm_fadvise64_64(int " fd ", int " advice ,
+.BI "                     loff_t " offset ", loff_t " len );
+.fi
+.in
+.PP
+The behavior of this system call is otherwise exactly the same as
+.BR posix_fadvise().
+No library support is provided for this system call in glibc.
+.\" No ARM support in glibc.
 .SH BUGS
 In kernels before 2.6.6, if
 .I len