From 2afe38d15cee01b2bb8f22383571f7f4a95f2d99 Mon Sep 17 00:00:00 2001 From: Johannes Berg Date: Tue, 6 Jan 2015 14:00:53 +0100 Subject: [PATCH] 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 --- drivers/net/wireless/ipw2x00/Kconfig | 2 +- drivers/net/wireless/orinoco/Kconfig | 2 +- net/wireless/Kconfig | 8 ++++++++ net/wireless/scan.c | 4 ++-- net/wireless/wext-compat.c | 18 +++++++++--------- net/wireless/wext-compat.h | 6 ++++++ 6 files changed, 27 insertions(+), 13 deletions(-) diff --git a/drivers/net/wireless/ipw2x00/Kconfig b/drivers/net/wireless/ipw2x00/Kconfig index 21de4fe6cf2d..d6ec44d7a391 100644 --- a/drivers/net/wireless/ipw2x00/Kconfig +++ b/drivers/net/wireless/ipw2x00/Kconfig @@ -66,7 +66,7 @@ config IPW2100_DEBUG config IPW2200 tristate "Intel PRO/Wireless 2200BG and 2915ABG Network Connection" depends on PCI && CFG80211 - select CFG80211_WEXT + select CFG80211_WEXT_EXPORT select WIRELESS_EXT select WEXT_SPY select WEXT_PRIV diff --git a/drivers/net/wireless/orinoco/Kconfig b/drivers/net/wireless/orinoco/Kconfig index 6d831d4d1b5f..f6fa3f4e294f 100644 --- a/drivers/net/wireless/orinoco/Kconfig +++ b/drivers/net/wireless/orinoco/Kconfig @@ -2,7 +2,7 @@ config HERMES tristate "Hermes chipset 802.11b support (Orinoco/Prism2/Symbol)" depends on (PPC_PMAC || PCI || PCMCIA) depends on CFG80211 - select CFG80211_WEXT + select CFG80211_WEXT_EXPORT select WIRELESS_EXT select WEXT_SPY select WEXT_PRIV 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 #include +#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); -- 2.20.1