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authorJohannes Berg <johannes.berg@intel.com>2015-01-06 16:00:53 +0300
committerJohannes Berg <johannes.berg@intel.com>2015-02-28 23:31:09 +0300
commit2afe38d15cee01b2bb8f22383571f7f4a95f2d99 (patch)
treefb20cff972e089702c3c98bffbc7868bb84834ed /net
parent7d9bb2f0653c7830e676f1012051fe9349ce2669 (diff)
downloadlinux-2afe38d15cee01b2bb8f22383571f7f4a95f2d99.tar.xz
cfg80211-wext: export symbols only when needed
When a fully converted cfg80211 driver needs cfg80211-wext for userspace API purposes, the symbols need not be exported. When other drivers (orinoco/hermes or ipw2200) are enabled, they do need the symbols exported as they use them directly. Make those drivers select a new CFG80211_WEXT_EXPORT Kconfig symbol (instead of just CFG80211_WEXT) and export the functions only if requested - this saves about 1/2k due to the size of EXPORT_SYMBOL() itself. Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Diffstat (limited to 'net')
-rw-r--r--net/wireless/Kconfig8
-rw-r--r--net/wireless/scan.c4
-rw-r--r--net/wireless/wext-compat.c18
-rw-r--r--net/wireless/wext-compat.h6
4 files changed, 25 insertions, 11 deletions
diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index 29c8675f9a11..b13dfb4ff001 100644
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -178,10 +178,18 @@ config CFG80211_WEXT
bool "cfg80211 wireless extensions compatibility"
depends on CFG80211
select WEXT_CORE
+ default y if CFG80211_WEXT_EXPORT
help
Enable this option if you need old userspace for wireless
extensions with cfg80211-based drivers.
+config CFG80211_WEXT_EXPORT
+ bool
+ depends on CFG80211
+ help
+ Drivers should select this option if they require cfg80211's
+ wext compatibility symbols to be exported.
+
config LIB80211
tristate
default n
diff --git a/net/wireless/scan.c b/net/wireless/scan.c
index c705c3e2b751..25e1e1fad905 100644
--- a/net/wireless/scan.c
+++ b/net/wireless/scan.c
@@ -1237,7 +1237,7 @@ int cfg80211_wext_siwscan(struct net_device *dev,
kfree(creq);
return err;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_siwscan);
+EXPORT_WEXT_HANDLER(cfg80211_wext_siwscan);
static void ieee80211_scan_add_ies(struct iw_request_info *info,
const struct cfg80211_bss_ies *ies,
@@ -1545,5 +1545,5 @@ int cfg80211_wext_giwscan(struct net_device *dev,
return res;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_giwscan);
+EXPORT_WEXT_HANDLER(cfg80211_wext_giwscan);
#endif
diff --git a/net/wireless/wext-compat.c b/net/wireless/wext-compat.c
index 5b24d39d7903..fff1bef6ed6d 100644
--- a/net/wireless/wext-compat.c
+++ b/net/wireless/wext-compat.c
@@ -63,7 +63,7 @@ int cfg80211_wext_giwname(struct net_device *dev,
return 0;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_giwname);
+EXPORT_WEXT_HANDLER(cfg80211_wext_giwname);
int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
u32 *mode, char *extra)
@@ -99,7 +99,7 @@ int cfg80211_wext_siwmode(struct net_device *dev, struct iw_request_info *info,
return cfg80211_change_iface(rdev, dev, type, NULL, &vifparams);
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_siwmode);
+EXPORT_WEXT_HANDLER(cfg80211_wext_siwmode);
int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info,
u32 *mode, char *extra)
@@ -134,7 +134,7 @@ int cfg80211_wext_giwmode(struct net_device *dev, struct iw_request_info *info,
}
return 0;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_giwmode);
+EXPORT_WEXT_HANDLER(cfg80211_wext_giwmode);
int cfg80211_wext_giwrange(struct net_device *dev,
@@ -248,7 +248,7 @@ int cfg80211_wext_giwrange(struct net_device *dev,
return 0;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_giwrange);
+EXPORT_WEXT_HANDLER(cfg80211_wext_giwrange);
/**
@@ -303,7 +303,7 @@ int cfg80211_wext_siwrts(struct net_device *dev,
return err;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_siwrts);
+EXPORT_WEXT_HANDLER(cfg80211_wext_siwrts);
int cfg80211_wext_giwrts(struct net_device *dev,
struct iw_request_info *info,
@@ -317,7 +317,7 @@ int cfg80211_wext_giwrts(struct net_device *dev,
return 0;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_giwrts);
+EXPORT_WEXT_HANDLER(cfg80211_wext_giwrts);
int cfg80211_wext_siwfrag(struct net_device *dev,
struct iw_request_info *info,
@@ -343,7 +343,7 @@ int cfg80211_wext_siwfrag(struct net_device *dev,
return err;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_siwfrag);
+EXPORT_WEXT_HANDLER(cfg80211_wext_siwfrag);
int cfg80211_wext_giwfrag(struct net_device *dev,
struct iw_request_info *info,
@@ -357,7 +357,7 @@ int cfg80211_wext_giwfrag(struct net_device *dev,
return 0;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_giwfrag);
+EXPORT_WEXT_HANDLER(cfg80211_wext_giwfrag);
static int cfg80211_wext_siwretry(struct net_device *dev,
struct iw_request_info *info,
@@ -427,7 +427,7 @@ int cfg80211_wext_giwretry(struct net_device *dev,
return 0;
}
-EXPORT_SYMBOL_GPL(cfg80211_wext_giwretry);
+EXPORT_WEXT_HANDLER(cfg80211_wext_giwretry);
static int __cfg80211_set_encryption(struct cfg80211_registered_device *rdev,
struct net_device *dev, bool pairwise,
diff --git a/net/wireless/wext-compat.h b/net/wireless/wext-compat.h
index ebcacca2f731..94c7405a5413 100644
--- a/net/wireless/wext-compat.h
+++ b/net/wireless/wext-compat.h
@@ -4,6 +4,12 @@
#include <net/iw_handler.h>
#include <linux/wireless.h>
+#ifdef CONFIG_CFG80211_WEXT_EXPORT
+#define EXPORT_WEXT_HANDLER(h) EXPORT_SYMBOL_GPL(h)
+#else
+#define EXPORT_WEXT_HANDLER(h)
+#endif /* CONFIG_CFG80211_WEXT_EXPORT */
+
int cfg80211_ibss_wext_siwfreq(struct net_device *dev,
struct iw_request_info *info,
struct iw_freq *freq, char *extra);