diff --git a/kernel/resource.c b/kernel/resource.c
index e2d0e1bc5aa7843a272506825b177ab6792c09ca..14d2572e82373d07dc4ccec3b3b2beddde9b165f 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -390,7 +390,9 @@ static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
 }
 
 /**
- * Walks through iomem resources and calls func() with matching resource
+ * walk_iomem_res_desc - walk through iomem resources
+ *
+ * Walks through iomem resources and calls @func() with matching resource
  * ranges. This walks through whole tree and not just first level children.
  * All the memory ranges which overlap start,end and also match flags and
  * desc are valid candidates.
@@ -399,6 +401,8 @@ static int __walk_iomem_res_desc(resource_size_t start, resource_size_t end,
  * @flags: I/O resource flags
  * @start: start addr
  * @end: end addr
+ * @arg: function argument for the callback @func
+ * @func: callback function that is called for each qualifying resource area
  *
  * NOTE: For a new descriptor search, define a new IORES_DESC in
  * <linux/ioport.h> and set it in 'desc' of a target resource entry.