linux-kernel - [PATCH] fix WAN routers kconfig dependency

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Date:	Sat, 9 Dec 2006 12:41:08 -0800
From:	Randy Dunlap <randy.dunlap@...cle.com>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	akpm <akpm@...l.org>, khc@...waw.pl, davem@...emloft.net
Subject: [PATCH] fix WAN routers kconfig dependency

From: Randy Dunlap <randy.dunlap@...cle.com>

Currently WAN router drivers can be built in-kernel while the
register/unregister_wan_device interfaces are built as modules.
This causes:

drivers/built-in.o: In function `cycx_init':
cycx_main.c:(.init.text+0x5c4b): undefined reference to `register_wan_device'
drivers/built-in.o: In function `cycx_exit':
cycx_main.c:(.exit.text+0x560): undefined reference to `unregister_wan_device'
make: *** [.tmp_vmlinux1] Error 1

The problem is caused by tristate -> bool conversion (y or m => y),
so convert WAN_ROUTER_DRIVERS to a tristate so that the correct
dependency is preserved.

Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>
---
 drivers/net/wan/Kconfig |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

--- linux-2.6.19-git13.orig/drivers/net/wan/Kconfig
+++ linux-2.6.19-git13/drivers/net/wan/Kconfig
@@ -382,7 +382,7 @@ config SDLA
 
 # Wan router core.
 config WAN_ROUTER_DRIVERS
-	bool "WAN router drivers"
+	tristate "WAN router drivers"
 	depends on WAN && WAN_ROUTER
 	---help---
 	  Connect LAN to WAN via Linux box.
@@ -393,7 +393,8 @@ config WAN_ROUTER_DRIVERS
 	  <file:Documentation/networking/wan-router.txt>.
 
 	  Note that the answer to this question won't directly affect the
-	  kernel: saying N will just cause the configurator to skip all
+	  kernel except for how subordinate drivers may be built:
+	  saying N will just cause the configurator to skip all
 	  the questions about WAN router drivers.
 
 	  If unsure, say N.


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