Commit 6416b9fa authored by Wang Sheng-Hui's avatar Wang Sheng-Hui Committed by Jiri Kosina
Browse files

mm: cleanup the comment for head/tail pages of compound pages in mm/page_alloc.c



Only tail pages point at the head page using their ->first_page fields.
Signed-off-by: default avatarWang Sheng-Hui <shhuiw@gmail.com>
Reviewed-by: default avatarMichal Hocko <mhocko@suse.cz>
Signed-off-by: default avatarJiri Kosina <jkosina@suse.cz>
parent 7433f2b7
......@@ -333,8 +333,8 @@ out:
*
* 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.
......
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