From: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Now that we can represent the location of 'deferred_list' in C instead
of comments, make use of that ability.
Signed-off-by: Matthew Wilcox <mawilcox@xxxxxxxxxxxxx>
Acked-by: Vlastimil Babka <vbabka@xxxxxxx>
Acked-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
---
mm/huge_memory.c | 7 ++-----
mm/page_alloc.c | 2 +-
2 files changed, 3 insertions(+), 6 deletions(-)
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index a3a1815f8e11..cb0954a6de88 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -483,11 +483,8 @@ pmd_t maybe_pmd_mkwrite(pmd_t pmd, struct vm_area_struct *vma)
static inline struct list_head *page_deferred_list(struct page *page)
{
- /*
- * ->lru in the tail pages is occupied by compound_head.
- * Let's use ->mapping + ->index in the second tail page as list_head.
- */
- return (struct list_head *)&page[2].mapping;
+ /* ->lru in the tail pages is occupied by compound_head. */
+ return &page[2].deferred_list;
}
void prep_transhuge_page(struct page *page)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index da3eb2236ba1..1a0149c4f672 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -933,7 +933,7 @@ static int free_tail_pages_check(struct page *head_page, struct page *page)
case 2:
/*
* the second tail page: ->mapping is
- * page_deferred_list().next -- ignore value.
+ * deferred_list.next -- ignore value.
*/
break;
default:
--
2.17.0
