to perform appropriate optimizations.
.P
The \fIadvice\fP applies to a (not necessarily existent) region starting
-at \fIoffset\fP and extending for \fIlen\fP bytes (or until the end of
-the file if \fIlen\fP is 0) within the file referred to by \fIfd\fP.
+at \fIoffset\fP and extending for \fIsize\fP bytes (or until the end of
+the file if \fIsize\fP is 0) within the file referred to by \fIfd\fP.
The \fIadvice\fP is not binding;
it merely constitutes an expectation on behalf of
the application.
(or, on some architectures,
.BR fadvise64_64 ());
the difference between the two is that the former system call
-assumes that the type of the \fIlen\fP argument is \fIsize_t\fP,
+assumes that the type of the \fIsize\fP argument is \fIsize_t\fP,
while the latter expects \fIloff_t\fP there.
.SS Architecture-specific variants
Some architectures require