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    Subject[PATCH v2 04/51] mm: page_io.c: comment on direct access to bvec table
    Date
    Cc: Andrew Morton <akpm@linux-foundation.org>
    Cc: linux-mm@kvack.org
    Signed-off-by: Ming Lei <ming.lei@redhat.com>
    ---
    mm/page_io.c | 2 ++
    1 file changed, 2 insertions(+)

    diff --git a/mm/page_io.c b/mm/page_io.c
    index b6c4ac388209..11c6f4a9a25b 100644
    --- a/mm/page_io.c
    +++ b/mm/page_io.c
    @@ -43,6 +43,7 @@ static struct bio *get_swap_bio(gfp_t gfp_flags,

    void end_swap_bio_write(struct bio *bio)
    {
    + /* single page bio, safe for multipage bvec */
    struct page *page = bio->bi_io_vec[0].bv_page;

    if (bio->bi_status) {
    @@ -116,6 +117,7 @@ static void swap_slot_free_notify(struct page *page)

    static void end_swap_bio_read(struct bio *bio)
    {
    + /* single page bio, safe for multipage bvec */
    struct page *page = bio->bi_io_vec[0].bv_page;
    struct task_struct *waiter = bio->bi_private;

    --
    2.9.4
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