[PATCH] mark check_region "deprecated"

This marks check_region "deprecated".

This gives a nice warning messages for programs that still use
check_region for example:

 drivers/parport/parport_pc.c:2215: warning: `__check_region' is deprecated (declared at include/linux/ioport.h:111)

include/linux/ioport.h

@@ -8,6 +8,7 @@
 #ifndef _LINUX_IOPORT_H
 #define _LINUX_IOPORT_H
 
+#include <linux/compiler.h>
 /*
  * Resources are tree-like, allowing
  * nesting etc..
@@ -107,7 +108,7 @@ extern struct resource * __request_region(struct resource *, unsigned long start
 #define check_mem_region(start,n)	__check_region(&iomem_resource, (start), (n))
 #define release_mem_region(start,n)	__release_region(&iomem_resource, (start), (n))
 
-extern int __check_region(struct resource *, unsigned long, unsigned long);
+extern int deprecated __check_region(struct resource *, unsigned long, unsigned long);
 extern void __release_region(struct resource *, unsigned long, unsigned long);
 
 #define get_ioport_list(buf)	get_resource_list(&ioport_resource, buf, PAGE_SIZE)

kernel/resource.c

@@ -237,7 +237,7 @@ struct resource * __request_region(struct resource *parent, unsigned long start,
 	return res;
 }
 
-int __check_region(struct resource *parent, unsigned long start, unsigned long n)
+int deprecated __check_region(struct resource *parent, unsigned long start, unsigned long n)
 {
 	struct resource * res;