From: Johannes Berg <johannes@sipsolutions.net>
Date: Wed, 26 Mar 2008 13:14:55 +0000 (+0100)
Subject: cfg80211: don't export ieee80211_get_channel
X-Git-Tag: v2.6.26-rc1~1138^2~291^2~4
X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=6c507cd0400cb51dd2ee251c1b8756b9375a1128;p=linux-2.6

cfg80211: don't export ieee80211_get_channel

This patch makes ieee80211_get_channel a static inline defined in
cfg80211's header file which simply calls __ieee80211_get_channel
to avoid symbol clashes with the ieee80211 code.

The problem was pointed out by David Miller, thanks!

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

diff --git a/include/net/wireless.h b/include/net/wireless.h
index f4b77ab66b..667b4080d3 100644
--- a/include/net/wireless.h
+++ b/include/net/wireless.h
@@ -304,10 +304,22 @@ extern int ieee80211_channel_to_frequency(int chan);
  */
 extern int ieee80211_frequency_to_channel(int freq);
 
+/*
+ * Name indirection necessary because the ieee80211 code also has
+ * a function named "ieee80211_get_channel", so if you include
+ * cfg80211's header file you get cfg80211's version, if you try
+ * to include both header files you'll (rightfully!) get a symbol
+ * clash.
+ */
+extern struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
+							 int freq);
+
 /**
  * ieee80211_get_channel - get channel struct from wiphy for specified frequency
  */
-extern struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy,
-						       int freq);
-
+static inline struct ieee80211_channel *
+ieee80211_get_channel(struct wiphy *wiphy, int freq)
+{
+	return __ieee80211_get_channel(wiphy, freq);
+}
 #endif /* __NET_WIRELESS_H */
diff --git a/net/wireless/util.c b/net/wireless/util.c
index f3e623df35..f54424693a 100644
--- a/net/wireless/util.c
+++ b/net/wireless/util.c
@@ -33,8 +33,8 @@ int ieee80211_frequency_to_channel(int freq)
 }
 EXPORT_SYMBOL(ieee80211_frequency_to_channel);
 
-struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy,
-						int freq)
+struct ieee80211_channel *__ieee80211_get_channel(struct wiphy *wiphy,
+						  int freq)
 {
 	enum ieee80211_band band;
 	struct ieee80211_supported_band *sband;
@@ -54,7 +54,7 @@ struct ieee80211_channel *ieee80211_get_channel(struct wiphy *wiphy,
 
 	return NULL;
 }
-EXPORT_SYMBOL(ieee80211_get_channel);
+EXPORT_SYMBOL(__ieee80211_get_channel);
 
 static void set_mandatory_flags_band(struct ieee80211_supported_band *sband,
 				     enum ieee80211_band band)