1 files changed, 55 insertions, 0 deletions

diff --git a/kernel/locking/mutex-debug.h b/kernel/locking/mutex-debug.h
new file mode 100644
index 000000000000..0799fd3e4cfa
--- /dev/null
+++ b/kernel/locking/mutex-debug.h
@@ -0,0 +1,55 @@
+/*
+ * Mutexes: blocking mutual exclusion locks
+ *
+ * started by Ingo Molnar:
+ *
+ *  Copyright (C) 2004, 2005, 2006 Red Hat, Inc., Ingo Molnar <mingo@redhat.com>
+ *
+ * This file contains mutex debugging related internal declarations,
+ * prototypes and inline functions, for the CONFIG_DEBUG_MUTEXES case.
+ * More details are in kernel/mutex-debug.c.
+ */
+
+/*
+ * This must be called with lock->wait_lock held.
+ */
+extern void debug_mutex_lock_common(struct mutex *lock,
+                                    struct mutex_waiter *waiter);
+extern void debug_mutex_wake_waiter(struct mutex *lock,
+                                    struct mutex_waiter *waiter);
+extern void debug_mutex_free_waiter(struct mutex_waiter *waiter);
+extern void debug_mutex_add_waiter(struct mutex *lock,
+                                   struct mutex_waiter *waiter,
+                                   struct thread_info *ti);
+extern void mutex_remove_waiter(struct mutex *lock, struct mutex_waiter *waiter,
+                                struct thread_info *ti);
+extern void debug_mutex_unlock(struct mutex *lock);
+extern void debug_mutex_init(struct mutex *lock, const char *name,
+                             struct lock_class_key *key);
+
+static inline void mutex_set_owner(struct mutex *lock)
+{
+        lock->owner = current;
+}
+
+static inline void mutex_clear_owner(struct mutex *lock)
+{
+        lock->owner = NULL;
+}
+
+#define spin_lock_mutex(lock, flags)                    \
+        do {                                            \
+                struct mutex *l = container_of(lock, struct mutex, wait_lock); \
+                                                        \
+                DEBUG_LOCKS_WARN_ON(in_interrupt());    \
+                local_irq_save(flags);                  \
+                arch_spin_lock(&(lock)->rlock.raw_lock);\
+                DEBUG_LOCKS_WARN_ON(l->magic != l);     \
+        } while (0)
+
+#define spin_unlock_mutex(lock, flags)                          \
+        do {                                                    \
+                arch_spin_unlock(&(lock)->rlock.raw_lock);      \
+                local_irq_restore(flags);                       \
+                preempt_check_resched();                        \
+        } while (0)