[PATCH -next] cpc-usb: fix PROC_FS dependency

[Randy Dunlap <randy.dunlap@oracle.com>]

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

The proper way to check for and enforce a kconfig symbol
dependency is via Kconfig files, not by using #error in
a source file followed by 9 other compile errors.

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Cc: Sebastian Haas <haas@ems-wuensche.com>
---
 drivers/staging/cpc-usb/Kconfig       |    2 +-
 drivers/staging/cpc-usb/cpc-usb_drv.c |   10 +---------
 2 files changed, 2 insertions(+), 10 deletions(-)

--- linux-next-20090522.orig/drivers/staging/cpc-usb/cpc-usb_drv.c
+++ linux-next-20090522/drivers/staging/cpc-usb/cpc-usb_drv.c
@@ -27,12 +27,8 @@
 #include <linux/completion.h>
 #include <asm/uaccess.h>
 #include <linux/usb.h>
-
 #include <linux/version.h>
-
-#ifdef CONFIG_PROC_FS
-#   include <linux/proc_fs.h>
-#endif
+#include <linux/proc_fs.h>
 
 #include "cpc.h"
 
@@ -57,10 +53,6 @@ MODULE_LICENSE("GPL v2");
 #define USB_CPCUSB_M16C_PRODUCT_ID    0x0888
 #define USB_CPCUSB_LPC2119_PRODUCT_ID 0x0444
 
-#ifndef CONFIG_PROC_FS
-#error "PROCFS needed"
-#endif
-
 #define CPC_USB_PROC_DIR     CPC_PROC_DIR "cpc-usb"
 
 static struct proc_dir_entry *procDir;
--- linux-next-20090522.orig/drivers/staging/cpc-usb/Kconfig
+++ linux-next-20090522/drivers/staging/cpc-usb/Kconfig
@@ -1,4 +1,4 @@
 config USB_CPC
 	tristate "CPC CAN USB driver"
-	depends on USB
+	depends on USB && PROC_FS
 	default n



-- 
~Randy
LPC 2009, Sept. 23-25, Portland, Oregon
http://linuxplumbersconf.org/2009/