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regulatory: use RCU to protect global and wiphy regdomains

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To simplify the locking and not require cfg80211_mutex
(which nl80211 uses to access the global regdomain) and
also to make it possible for drivers to access their
wiphy->regd safely, use RCU to protect these pointers.

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 15:47:38 +01:00
parent 379b82f4c9
commit 458f4f9e96
5 changed files with 88 additions and 66 deletions
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2
net/wireless/reg.h
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@@ -16,7 +16,7 @@
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
extern const struct ieee80211_regdomain *cfg80211_regdomain;
extern const struct ieee80211_regdomain __rcu *cfg80211_regdomain;
bool is_world_regdom(const char *alpha2);
bool reg_supported_dfs_region(u8 dfs_region);