[Suspend2][ 16/32] [Suspend2] Add page io to a batch.

[Nigel Cunningham]

Add a page to the current batch. If the batch becomes full as a result,
submit it.

Signed-off-by: Nigel Cunningham <nigel@xxxxxxxxxxxx>

 kernel/power/suspend_block_io.c |   17 +++++++++++++++++
 1 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/kernel/power/suspend_block_io.c b/kernel/power/suspend_block_io.c
index 07db518..728df04 100644
--- a/kernel/power/suspend_block_io.c
+++ b/kernel/power/suspend_block_io.c
@@ -556,3 +556,20 @@ static int submit_batched(void)
 	return num_submitted;
 }
 
+static void add_to_batch(struct io_info *io_info)
+{
+	unsigned long flags;
+
+	set_bit(IO_AWAITING_SUBMIT, &io_info->flags);
+
+	/* Put our prepared I/O struct on the batch list. */
+	spin_lock_irqsave(&ioinfo_submit_lock, flags);
+	list_add_tail(&io_info->list, &ioinfo_submit_batch);
+	spin_unlock_irqrestore(&ioinfo_submit_lock, flags);
+
+	atomic_inc(&submit_batch);
+
+	if (atomic_read(&submit_batch) >= submit_batch_size)
+		submit_batched();
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net
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