[PATCH] move prototype for __get_vm_area() to a sane location

There are currently two files besides mm/vmalloc.c that make use of that
function:

- arch/sh/kernel/cpu/sh4/sq.c
  which defined its own prototype locally risking not being in sync with
  the real function, and

- arch/arm/kernel/module.c which has no prototype at all and cause
  build warnings.

This fixes those issues

arch/sh/kernel/cpu/sh4/sq.c

@@ -34,8 +34,6 @@
 static LIST_HEAD(sq_mapping_list);
 static spinlock_t sq_mapping_lock = SPIN_LOCK_UNLOCKED;
 
-extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags, unsigned long start, unsigned long end);
-
 /**
  * sq_flush - Flush (prefetch) the store queue cache
  *

include/linux/vmalloc.h

@@ -36,6 +36,8 @@ extern void vunmap(void *addr);
  *	Lowlevel-APIs (not for driver use!)
  */
 extern struct vm_struct *get_vm_area(unsigned long size, unsigned long flags);
+extern struct vm_struct *__get_vm_area(unsigned long size, unsigned long flags,
+					unsigned long start, unsigned long end);
 extern struct vm_struct *remove_vm_area(void *addr);
 extern int map_vm_area(struct vm_struct *area, pgprot_t prot,
 			struct page ***pages);