um: Declare fix_range_common as a static function

It is only used within the same file.

Signed-off-by: Benjamin Berg <[e-mail]>
Signed-off-by: Richard Weinberger <[e-mail]>

arch/um/kernel/tlb.c

···
 	return ret;
 }
 
-void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
-		      unsigned long end_addr, int force)
+static void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
+			     unsigned long end_addr, int force)
 {
 	pgd_t *pgd;
 	struct host_vm_change hvc;