locking/local_lock: Expose dep_map in local_trylock_t.

lockdep_is_held() macro assumes that "struct lockdep_map dep_map;"
is a top level field of any lock that participates in LOCKDEP.
Make it so for local_trylock_t.

Reviewed-by: Sebastian Andrzej Siewior <[email protected]>
Signed-off-by: Alexei Starovoitov <[email protected]>
Reviewed-by: Harry Yoo <[email protected]>
Reviewed-by: Suren Baghdasaryan <[email protected]>
Signed-off-by: Vlastimil Babka <[email protected]>

Author: Alexei Starovoitov

include/linux/local_lock_internal.h

@@ -17,7 +17,10 @@ typedef struct {
 
 /* local_trylock() and local_trylock_irqsave() only work with local_trylock_t */
 typedef struct {
-	local_lock_t	llock;
+#ifdef CONFIG_DEBUG_LOCK_ALLOC
+	struct lockdep_map	dep_map;
+	struct task_struct	*owner;
+#endif
 	u8		acquired;
 } local_trylock_t;
 
@@ -31,7 +34,7 @@ typedef struct {
 	.owner = NULL,
 
 # define LOCAL_TRYLOCK_DEBUG_INIT(lockname)		\
-	.llock = { LOCAL_LOCK_DEBUG_INIT((lockname).llock) },
+	LOCAL_LOCK_DEBUG_INIT(lockname)
 
 static inline void local_lock_acquire(local_lock_t *l)
 {
@@ -81,7 +84,7 @@ do {								\
 	local_lock_debug_init(lock);				\
 } while (0)
 
-#define __local_trylock_init(lock) __local_lock_init(lock.llock)
+#define __local_trylock_init(lock) __local_lock_init((local_lock_t *)lock)
 
 #define __spinlock_nested_bh_init(lock)				\
 do {								\