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    SubjectRe: [PATCH] mm: cleanup the comment for head/tail pages of compound pages in mm/page_alloc.c
    [CCing trivial tree]

    Unquoted patch at https://lkml.org/lkml/2011/11/15/402

    On Wed 16-11-11 08:05:07, Wang Sheng-Hui wrote:
    [...]
    > Thanks, Michal.
    >
    > New patch generated.
    >
    >
    > [PATCH] 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: Wang Sheng-Hui <shhuiw@gmail.com>

    Reviewed-by: Michal Hocko <mhocko@suse.cz>

    > ---
    > mm/page_alloc.c | 4 ++--
    > 1 files changed, 2 insertions(+), 2 deletions(-)
    >
    > diff --git a/mm/page_alloc.c b/mm/page_alloc.c
    > index 6e8ecb6..e7dd848 100644
    > --- a/mm/page_alloc.c
    > +++ b/mm/page_alloc.c
    > @@ -332,8 +332,8 @@ 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.
    > --
    > 1.7.1

    --
    Michal Hocko
    SUSE Labs
    SUSE LINUX s.r.o.
    Lihovarska 1060/12
    190 00 Praha 9
    Czech Republic


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