tree 1d59027cbdaec732f3e1378770cbf7b42b48cd70
parent d0709a65181beb787ef3f58cfe45536a2bb254c8
author Johannes Berg <johannes@sipsolutions.net> 1203953267 +0100
committer John W. Linville <linville@tuxdriver.com> 1204835447 -0500

mac80211: split sta_info_add

sta_info_add() has two functions: allocating a station info
structure and inserting it into the hash table/list. Splitting
these two functions allows allocating with GFP_KERNEL in many
places instead of GFP_ATOMIC which is now required by the RCU
protection. Additionally, in many places RCU protection is now
no longer needed at all because between sta_info_alloc() and
sta_info_insert() the caller owns the structure.

This fixes a few race conditions with setting initial flags
and similar, but not all (see comments in ieee80211_sta.c and
cfg.c). More documentation on the existing races will be in
a follow-up patch.

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