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>
diff --git a/arch/um/include/shared/tlb.h b/arch/um/include/shared/tlb.h
index ecd2265..8a50ce1 100644
--- a/arch/um/include/shared/tlb.h
+++ b/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
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index d175d05..d1da8ac 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -287,7 +287,7 @@
 	}
 }
 
-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;