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cfg80211: rcu-ify rdev and wdev

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Future code will need to look up rdev and wdev
within atomic sections, but currently we need
to lock a mutex for such lookups. Change the
list handling for both to be RCU-safe so that
we can look them up in rcu sections instead in
the future.

Signed-off-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
This commit is contained in:
Johannes Berg
2010-01-17 15:49:02 +01:00
committed by John W. Linville
parent c57199bc32
commit 5f2aa25e0e
2 changed files with 17 additions and 12 deletions
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3
net/wireless/core.h
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@@ -1,7 +1,7 @@
/*
* Wireless configuration interface internals.
*
* Copyright 2006-2009 Johannes Berg <johannes@sipsolutions.net>
* Copyright 2006-2010 Johannes Berg <johannes@sipsolutions.net>
*/
#ifndef __NET_WIRELESS_CORE_H
#define __NET_WIRELESS_CORE_H
@@ -48,6 +48,7 @@ struct cfg80211_registered_device {
/* associate netdev list */
struct mutex devlist_mtx;
/* protected by devlist_mtx or RCU */
struct list_head netdev_list;
int devlist_generation;
int opencount; /* also protected by devlist_mtx */