[PATCH] tftp.h: rework layout to work with fortification

[David Miller]

From: Andreas Schwab <schwab@linux-m68k.org>
Date: Thu, 12 Apr 2012 17:52:30 +0200

> I wonder what's the use of packing here.  There should be no padding,
> each field has at most short alignment.

I think it's to handle cpus like ARM where a structure containing
smaller than u32 objects will be aligned up to need u32 alignment.

In the Linux kernel we have:

struct nd_opt_hdr {
	__u8		nd_opt_type;
	__u8		nd_opt_len;
} __packed;

to deal with this ARM issue.