diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 16021b0..16c2e98 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -48,7 +48,7 @@
 config LOG_BUF_SHIFT
 	int "Kernel log buffer size (16 => 64KB, 17 => 128KB)" if DEBUG_KERNEL
 	range 12 21
-	default 17 if S390
+	default 17 if S390 || LOCKDEP
 	default 16 if X86_NUMAQ || IA64
 	default 15 if SMP
 	default 14
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 5cd05f20..9bdc8d4 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -15,6 +15,7 @@
 #include <linux/sched.h>
 #include <linux/delay.h>
 #include <linux/module.h>
+#include <linux/lockdep.h>
 #include <linux/spinlock.h>
 #include <linux/kallsyms.h>
 #include <linux/interrupt.h>
@@ -889,9 +890,6 @@
 #include "locking-selftest-softirq.h"
 // GENERATE_PERMUTATIONS_3_EVENTS(irq_read_recursion2_soft)
 
-#define lockdep_reset()
-#define lockdep_reset_lock(x)
-
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 # define I_SPINLOCK(x)	lockdep_reset_lock(&lock_##x.dep_map)
 # define I_RWLOCK(x)	lockdep_reset_lock(&rwlock_##x.dep_map)