mm: cleanup the comment for head/tail pages of compound pages in mm/p…

…age_alloc.c Only tail pages point at the head page using their ->first_page fields. Signed-off-by: Wang Sheng-Hui <[email protected]> Reviewed-by: Michal Hocko <[email protected]> Signed-off-by: Jiri Kosina <[email protected]>
sm00th · Nov 17, 2011 · 6416b9f · 6416b9f
1 parent 7433f2b
commit 6416b9f
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
@@ -333,8 +333,8 @@ static void bad_page(struct page *page)
  *
  * The remaining PAGE_SIZE pages are called "tail pages".
  *
- * All pages have PG_compound set.  All pages have their ->private pointing at
- * the head page (even the head page has this).
+ * All pages have PG_compound set.  All tail pages have their ->first_page
+ * pointing at the head page.
  *
  * The first tail page's ->lru.next holds the address of the compound page's
  * put_page() function.  Its ->lru.prev holds the order of allocation.