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    Subject[Suspend2][ 10/32] [Suspend2] Wait on readahead.
    Date
    Wait for the next page of readahead to be complete.

    Signed-off-by: Nigel Cunningham <nigel@suspend2.net>

    kernel/power/suspend_block_io.c | 15 +++++++++++++++
    1 files changed, 15 insertions(+), 0 deletions(-)

    diff --git a/kernel/power/suspend_block_io.c b/kernel/power/suspend_block_io.c
    index f9c883a..ae45fc3 100644
    --- a/kernel/power/suspend_block_io.c
    +++ b/kernel/power/suspend_block_io.c
    @@ -385,3 +385,18 @@ static void wait_on_one_page(struct io_i
    do { do_bio_wait(3); } while (io_info->flags);
    }

    +/*
    + * wait_on_readahead
    + *
    + * Wait until a particular readahead is ready.
    + */
    +static void suspend_wait_on_readahead(int readahead_index)
    +{
    + int index = readahead_index / BITS_PER_LONG;
    + int bit = readahead_index - index * BITS_PER_LONG;
    +
    + /* read_ahead_index is the one we want to return */
    + while (!test_bit(bit, &suspend_readahead_flags[index]))
    + do_bio_wait(6);
    +}
    +
    --
    Nigel Cunningham nigel at suspend2 dot net
    -
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