1 files changed, 10 insertions, 1 deletions

diff --git a/include/linux/mutex.h b/include/linux/mutex.h
index 94b48bd40dd7..a940fe435aca 100644
--- a/include/linux/mutex.h
+++ b/include/linux/mutex.h
@@ -51,7 +51,7 @@ struct mutex {
         spinlock_t              wait_lock;
         struct list_head        wait_list;
 #if defined(CONFIG_DEBUG_MUTEXES) || defined(CONFIG_SMP)
-        struct thread_info      *owner;
+        struct task_struct      *owner;
 #endif
 #ifdef CONFIG_DEBUG_MUTEXES
         const char              *name;
@@ -132,6 +132,7 @@ static inline int mutex_is_locked(struct mutex *lock)
  */
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
 extern void mutex_lock_nested(struct mutex *lock, unsigned int subclass);
+extern void _mutex_lock_nest_lock(struct mutex *lock, struct lockdep_map *nest_lock);
 extern int __must_check mutex_lock_interruptible_nested(struct mutex *lock,
                                         unsigned int subclass);
 extern int __must_check mutex_lock_killable_nested(struct mutex *lock,
@@ -140,6 +141,13 @@ extern int __must_check mutex_lock_killable_nested(struct mutex *lock,
 #define mutex_lock(lock) mutex_lock_nested(lock, 0)
 #define mutex_lock_interruptible(lock) mutex_lock_interruptible_nested(lock, 0)
 #define mutex_lock_killable(lock) mutex_lock_killable_nested(lock, 0)
+
+#define mutex_lock_nest_lock(lock, nest_lock)                           \
+do {                                                                    \
+        typecheck(struct lockdep_map *, &(nest_lock)->dep_map);         \
+        _mutex_lock_nest_lock(lock, &(nest_lock)->dep_map);             \
+} while (0)
+
 #else
 extern void mutex_lock(struct mutex *lock);
 extern int __must_check mutex_lock_interruptible(struct mutex *lock);
@@ -148,6 +156,7 @@ extern int __must_check mutex_lock_killable(struct mutex *lock);
 # define mutex_lock_nested(lock, subclass) mutex_lock(lock)
 # define mutex_lock_interruptible_nested(lock, subclass) mutex_lock_interruptible(lock)
 # define mutex_lock_killable_nested(lock, subclass) mutex_lock_killable(lock)
+# define mutex_lock_nest_lock(lock, nest_lock) mutex_lock(lock)
 #endif
 
 /*