diff --git a/include/linux/highmem.h b/include/linux/highmem.h
index 451c1dff0e87..00341b56d291 100644
--- a/include/linux/highmem.h
+++ b/include/linux/highmem.h
@@ -439,6 +439,13 @@ static inline void memzero_page(struct page *page, size_t offset, size_t len)
 	kunmap_local(addr);
 }
 
+/**
+ * memcpy_from_folio - Copy a range of bytes from a folio.
+ * @to: The memory to copy to.
+ * @folio: The folio to read from.
+ * @offset: The first byte in the folio to read.
+ * @len: The number of bytes to copy.
+ */
 static inline void memcpy_from_folio(char *to, struct folio *folio,
 		size_t offset, size_t len)
 {
@@ -460,6 +467,13 @@ static inline void memcpy_from_folio(char *to, struct folio *folio,
 	} while (len > 0);
 }
 
+/**
+ * memcpy_to_folio - Copy a range of bytes to a folio.
+ * @folio: The folio to write to.
+ * @offset: The first byte in the folio to store to.
+ * @from: The memory to copy from.
+ * @len: The number of bytes to copy.
+ */
 static inline void memcpy_to_folio(struct folio *folio, size_t offset,
 		const char *from, size_t len)
 {