locking/static_keys: Make verify_keys() static

Signed-off-by: Fengguang Wu <[e-mail]>
Cc: Jason Baron <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Cc: Peter Zijlstra (Intel) <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Link: http://lkml.kernel.org/r/20150803184748.GA80634@lkp-ib04
Signed-off-by: Ingo Molnar <[e-mail]>

lib/test_static_keys.c

···
 	}
 }
 
-int verify_keys(struct test_key *keys, int size, bool invert)
+static int verify_keys(struct test_key *keys, int size, bool invert)
 {
 	int i;
 	bool ret, init;