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regulatory: use RCU to protect last_request

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This will allow making freq_reg_info() lock-free.

Acked-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg 2012-12-06 16:29:25 +01:00
parent 458f4f9e96
commit c492db370c
2 changed files with 111 additions and 90 deletions
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2
include/net/regulatory.h
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@ -36,6 +36,7 @@ enum environment_cap {
/**
* struct regulatory_request - used to keep track of regulatory requests
*
* @rcu_head: RCU head struct used to free the request
* @wiphy_idx: this is set if this request's initiator is
* %REGDOM_SET_BY_COUNTRY_IE or %REGDOM_SET_BY_DRIVER. This
* can be used by the wireless core to deal with conflicts
@ -73,6 +74,7 @@ enum environment_cap {
* @list: used to insert into the reg_requests_list linked list
*/
struct regulatory_request {
struct rcu_head rcu_head;
int wiphy_idx;
enum nl80211_reg_initiator initiator;
enum nl80211_user_reg_hint_type user_reg_hint_type;