Somebody in the thread at some point said:

On Monday 13 August 2007 00:49, Hans de Goede wrote:

quoted

I already found that one, but there is no drivers/net/wireless/mac80211 dir
there. What am I missing?

John Linville recently collapsed that directory into driver/net/wireless.

Looking through that gitweb HEAD, the mac80211 stuff appears to be just
plain absent at the moment as Hans says:

http://git.kernel.org/?p=linux/kernel/git/linville/wireless-dev.git;a=blob;f=drivers/net/wireless/Kconfig;h=ae27af0141c02ee5b6100aa7f512dfdd77c4e703;hb=HEAD

-Andy