radix tree test suite: Dial down verbosity with -v

Make the output of radix tree test suite less verbose by default and add
-v and -vv command line options for increasing level of verbosity.

Signed-off-by: Rehas Sachdeva <aquannie@gmail.com>
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>

tools/testing/radix-tree/linux/radix-tree.h

@@ -3,6 +3,7 @@
 #include "../../../../include/linux/radix-tree.h"
 
 extern int kmalloc_verbose;
+extern int test_verbose;
 
 static inline void trace_call_rcu(struct rcu_head *head,
 		void (*func)(struct rcu_head *head))
@@ -12,6 +13,11 @@ static inline void trace_call_rcu(struct rcu_head *head,
 				offsetof(struct radix_tree_node, rcu_head));
 	call_rcu(head, func);
 }
+
+#define printv(verbosity_level, fmt, ...) \
+	if(test_verbose >= verbosity_level) \
+		printf(fmt, ##__VA_ARGS__)
+
 #undef call_rcu
 #define call_rcu(x, y) trace_call_rcu(x, y)