tree 79b259a6b0396cbecf9e775c7ba5a80e2c4d94c9
parent 506d03f97d10e54fd27c58c872a98242326d6419
author Johannes Berg <johannes@sipsolutions.net> 1232747643 +0100
committer John W. Linville <linville@tuxdriver.com> 1233262905 -0500

mac80211: add interface list lock

Using only the RTNL has a number of problems, most notably that
ieee80211_iterate_active_interfaces() and other interface list
traversals cannot be done from the internal workqueue because it
needs to be flushed under the RTNL.

This patch introduces a new mutex that protects the interface list
against modifications. A more detailed explanation is part of the
code change.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>