[PATCH v2] net: enable wireless core features with LEGACY_WEXT_ALLCONFIG

[Mark Salyzyn <salyzyn@android.com>]

In embedded environments the requirements are to be able to pick and
chose which features one requires built into the kernel.  If an
embedded environment wants to supports loading modules that have been
kbuilt out of tree, there is a need to enable hidden configurations
for legacy wireless core features to provide the API surface for
them to load.

Introduce CONFIG_LEGACY_WEXT_ALLCONFIG to select all legacy wireless
extension core features by activating in turn all the associated
hidden configuration options, without having to specifically select
any wireless module(s).

Signed-off-by: Mark Salyzyn <salyzyn@android.com>
Cc: kernel-team@android.com
Cc: Johannes Berg <johannes@sipsolutions.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Marcel Holtmann <marcel@holtmann.org>
Cc: linux-wireless@vger.kernel.org
Cc: netdev@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org # 4.19
---
v2: change name and documentation to CONFIG_LEGACY_WEXT_ALLCONFIG
---
 net/wireless/Kconfig | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
index 67f8360dfcee..0d646cf28de5 100644
--- a/net/wireless/Kconfig
+++ b/net/wireless/Kconfig
@@ -17,6 +17,20 @@ config WEXT_SPY
 config WEXT_PRIV
 	bool
 
+config LEGACY_WEXT_ALLCONFIG
+	bool "allconfig for legacy wireless extensions"
+	select WIRELESS_EXT
+	select WEXT_CORE
+	select WEXT_PROC
+	select WEXT_SPY
+	select WEXT_PRIV
+	help
+	  Config option used to enable all the legacy wireless extensions to
+	  the core functionality used by add-in modules.
+
+	  If you are not building a kernel to be used for a variety of
+	  out-of-kernel built wireless modules, say N here.
+
 config CFG80211
 	tristate "cfg80211 - wireless configuration API"
 	depends on RFKILL || !RFKILL
-- 
2.23.0.187.g17f5b7556c-goog