Add the missing documentation for the 'treelock' parameter.

Signed-off-by: Wolfram Sang <[email protected]>
---
 include/linux/radix-tree.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/linux/radix-tree.h b/include/linux/radix-tree.h
index eae67015ce51..b8997f07b2d4 100644
--- a/include/linux/radix-tree.h
+++ b/include/linux/radix-tree.h
@@ -182,6 +182,7 @@ static inline void *radix_tree_deref_slot(void __rcu **slot)
 /**
  * radix_tree_deref_slot_protected - dereference a slot with tree lock held
  * @slot: slot pointer, returned by radix_tree_lookup_slot
+ * @treelock: pointer to the spinlock protecting the tree
  *
  * Similar to radix_tree_deref_slot.  The caller does not hold the RCU read
  * lock but it must hold the tree lock to prevent parallel updates.
-- 
2.47.3


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