um: make flush_tlb_kernel_range_common() static

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/include/shared/tlb.h

@@ -9,7 +9,5 @@
 #include "um_mmu.h"
 
 extern void force_flush_all(void);
-extern int flush_tlb_kernel_range_common(unsigned long start,
-					 unsigned long end);
 
 #endif

arch/um/kernel/tlb.c

@@ -287,7 +287,7 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
 	}
 }
 
-int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
+static int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
 {
 	struct mm_struct *mm;
 	pgd_t *pgd;