[PATCH 1/7] mm/page_alloc: Add kernel-docs for free_pages()

["Vishal Moola (Oracle)" <vishal.moola@gmail.com>]

Add kernel-docs to free_pages(). This will help callers understand when
to use it instead of __free_pages().

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
---
 mm/page_alloc.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index baead29b3e67..6ee8f450c078 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5270,6 +5270,15 @@ void free_pages_nolock(struct page *page, unsigned int order)
 	___free_pages(page, order, FPI_TRYLOCK);
 }
 
+/**
+ * free_pages - Free pages allocated with alloc_pages().
+ * @addr: The virtual address tied to a page returned from alloc_pages().
+ * @order: The order of the allocation.
+ *
+ * This function behaves the same as __free_pages(). Use this function
+ * to free pages when you only have a valid virtual address. If you have
+ * the page, call __free_pages() instead.
+ */
 void free_pages(unsigned long addr, unsigned int order)
 {
 	if (addr != 0) {
-- 
2.51.0