[PATCH v3 06/18] locking/lockdep: Update obsolete struct field description

[Yuyang Du]

The lock_chain struct definition has outdated comment, update it and add
struct member description.

Signed-off-by: Yuyang Du <duyuyang@xxxxxxxxx>
---
 include/linux/lockdep.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/include/linux/lockdep.h b/include/linux/lockdep.h
index 79c3873..37706ad 100644
--- a/include/linux/lockdep.h
+++ b/include/linux/lockdep.h
@@ -199,10 +199,16 @@ struct lock_list {
 };
 
 /*
- * We record lock dependency chains, so that we can cache them:
+ * struct lock_chain - we record lock dependency chains so that we can cache them
+ *
+ * @irq_context: the same as irq_context in held_lock below
+ * @depth:       the number of held locks in this chain
+ * @base:        the index in chain_hlocks for this chain
+ * @entry:       the collided lock chains in lock_chain hash list
+ * @chain_key:   the hash key of this lock_chain
  */
 struct lock_chain {
-	/* see BUILD_BUG_ON()s in lookup_chain_cache() */
+	/* see BUILD_BUG_ON()s in add_chain_cache() */
 	unsigned int			irq_context :  2,
 					depth       :  6,
 					base	    : 24;
-- 
1.8.3.1