From: Eric Dumazet <redacted>
Date: Tue, 31 Jul 2007 10:52:15 +0200

I understand ifdefs are ugly, but in the common case
(PAGE_SIZE<64K), this change seems very unfortunate.

If this bothers you so much start where the real problems are and
advocate on linux-kernel for descreasing the type size of "offset" and
"length" in struct scatterlist.  It's a bit on the hypocritical side
to complain about this skb_frag_t change when I've never seen a peep
out of you about scatterlist doing the same thing :-)

Otherwise, we're better off with the types being the same so that we
can use scatterlist in skb_frag_t and therefore kill serious
performance problems with DMA mapping of sk_buff objects that exists
today on platforms such as powerpc.