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Re: [PATCH] d80211: create net/wireless/Kconfig and make nl80211 optional

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Johannes Berg wrote:
I guess this'll never end...
>
+cfg80211-$(CONFIG_NL80211) += nl80211.o
>
Could you live with it not being a module itself so we can just make it
a boolean and use the current way it's done in the Makefile?

Yup. I set it to a bool.

New patch (with Randy's feedback to indent help text w/ two spaces) below...

Thanks,
James

-------------------------

[PATCH] create net/wireless/Kconfig and make nl80211 optional

Move the wireless Kconfig options into their own wireless/Kconfig and
add a CONFIG_NL80211 configuration option to allow nl80211
support to be optionally included (default =y)

This also implements stub functions for nl80211_init and nl80211_exit
when CONFIG_NL80211 is not defined.

Acked-by: Johannes Berg <johannes@xxxxxxxxxxxxxxxx>
Signed-off-by: James Ketrenos <jketreno@xxxxxxxxxxxxxxx>
---
 net/Kconfig            |   17 +----------------
 net/wireless/Kconfig   |   33 +++++++++++++++++++++++++++++++++
 net/wireless/Makefile  |    3 ++-
 net/wireless/nl80211.h |   10 ++++++++++
 4 files changed, 46 insertions(+), 17 deletions(-)
---
diff --git a/net/Kconfig b/net/Kconfig
index 3bff36e..6fa4d68 100644
--- a/net/Kconfig
+++ b/net/Kconfig
@@ -228,22 +228,7 @@ config WIRELESS_EXT
 config FIB_RULES
 	bool

-config CFG80211
-	tristate "Improved wireless configuration API"
-
-config CFG80211_WEXT_COMPAT
-	bool "cfg80211 Wireless Extensions compatibility"
-	depends CFG80211
-	default y
-	---help---
-	This option allows using devices whose drivers have been
-	converted to use the new cfg80211 with wireless extensions,
-	providing WE-20 compatibility. Note that cfg80211's "native"
-	interface is nl80211 using generic netlink. The wireless
-	extensions are being deprecated, but userspace tools may still
-	be using them.
-
-	If unsure, say Y.
+source "net/wireless/Kconfig"

 endif   # if NET
 endmenu # Networking
diff --git a/net/wireless/Kconfig b/net/wireless/Kconfig
new file mode 100644
index 0000000..7e83504
--- /dev/null
+++ b/net/wireless/Kconfig
@@ -0,0 +1,31 @@
+config CFG80211
+        tristate "Improved wireless configuration API"
+
+config CFG80211_WEXT_COMPAT
+        bool "cfg80211 Wireless Extensions compatibility"
+        depends CFG80211
+        default y
+        ---help---
+          This option allows using devices whose drivers have been
+          converted to use the new cfg80211 with wireless extensions,
+          providing WE-20 compatibility.
+	
+          Note that cfg80211's "native" interface is nl80211 using
+          generic netlink. The wireless extensions are being
+          deprecated, but userspace tools may still be using them.
+
+          If unsure, say Y.
+
+config NL80211
+	bool "nl80211 new netlink interface support"
+	depends CFG80211
+	default y
+	---help---
+         This option turns on the new netlink interface
+         (nl80211) support in cfg80211.
+	
+         If =n, drivers using d80211 will be configured via
+         wireless extension support provided by that subsystem.
+
+         If unsure, say Y.
+
diff --git a/net/wireless/Makefile b/net/wireless/Makefile
index c52c251..1f47511 100644
--- a/net/wireless/Makefile
+++ b/net/wireless/Makefile
@@ -1,6 +1,7 @@
 obj-$(CONFIG_CFG80211) += cfg80211.o

-cfg80211-y += core.o sysfs.o nl80211.o
+cfg80211-y += core.o sysfs.o
+cfg80211-$(CONFIG_NL80211) += nl80211.o
 cfg80211-$(CONFIG_CFG80211_WEXT_COMPAT) += wext-compat.o

 ifeq ($(CONFIG_CFG80211),m)
diff --git a/net/wireless/nl80211.h b/net/wireless/nl80211.h
index 0edc7a4..31524c7 100644
--- a/net/wireless/nl80211.h
+++ b/net/wireless/nl80211.h
@@ -1,7 +1,17 @@
 #ifndef __NET_WIRELESS_NL80211_H
 #define __NET_WIRELESS_NL80211_H

+#ifdef CONFIG_NL80211
 extern int nl80211_init(void);
 extern void nl80211_exit(void);
+#else
+static inline int nl80211_init(void)
+{
+	return 0;
+}
+static inline void nl80211_exit(void)
+{
+}
+#endif /* CONFIG_NL80211 */

 #endif /* __NET_WIRELESS_NL80211_H */
-
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