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Commit 6416b9fa authored by Wang Sheng-Hui's avatar Wang Sheng-Hui Committed by Jiri Kosina
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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
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+2 −2
Original line number Diff line number Diff line
@@ -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.