[Suspend2][ 13/28] [Suspend2] Initialise/cleanup swapwriter

[Nigel Cunningham <nigel@suspend2.net>]

Initialise and cleanup routines, called when we're going to do something.
It may be just modifying a setting, but some of these result in I/O being
done to (eg) check whether an image exists.

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

 kernel/power/suspend_swap.c |   23 +++++++++++++++++++++++
 1 files changed, 23 insertions(+), 0 deletions(-)

diff --git a/kernel/power/suspend_swap.c b/kernel/power/suspend_swap.c
index 792bcc8..ae0dfad 100644
--- a/kernel/power/suspend_swap.c
+++ b/kernel/power/suspend_swap.c
@@ -429,3 +429,26 @@ static int swapwriter_storage_available(
 	return swapinfo.freeswap + swapwriter_storage_allocated();
 }
 
+static int swapwriter_initialise(int starting_cycle)
+{
+	if (!starting_cycle)
+		return 0;
+
+	enable_swapfile();
+
+	if (resume_dev_t && !resume_block_device &&
+	    IS_ERR(resume_block_device =
+	    		open_bdev(MAX_SWAPFILES, resume_dev_t)))
+		return 1;
+	
+	return 0;
+}
+
+static void swapwriter_cleanup(int ending_cycle)
+{
+	if (ending_cycle)
+		disable_swapfile();
+	
+	close_bdevs();
+}
+

--
Nigel Cunningham		nigel at suspend2 dot net
-
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