Mark in the signature of a swap image that we've attempted to resume from
this image before.
Signed-off-by: Nigel Cunningham <[email protected]>
kernel/power/suspend_swap.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 files changed, 41 insertions(+), 0 deletions(-)
diff --git a/kernel/power/suspend_swap.c b/kernel/power/suspend_swap.c
index 7342cb2..683797a 100644
--- a/kernel/power/suspend_swap.c
+++ b/kernel/power/suspend_swap.c
@@ -926,3 +926,44 @@ static int swapwriter_image_exists(void)
return 1;
}
+/*
+ * Mark resume attempted.
+ *
+ * Record that we tried to resume from this image.
+ */
+
+static void swapwriter_mark_resume_attempted(void)
+{
+ union p_diskpage diskpage;
+ int signature_found;
+
+ if (!resume_dev_t) {
+ printk("Not even trying to record attempt at resuming"
+ " because resume_dev_t is not set.\n");
+ return;
+ }
+
+ diskpage.address = get_zeroed_page(GFP_ATOMIC);
+
+ suspend_bio_ops.bdev_page_io(READ, resume_block_device,
+ resume_firstblock,
+ virt_to_page(diskpage.ptr));
+ signature_found = parse_signature(diskpage.pointer->swh.magic.magic, 0);
+
+ switch (signature_found) {
+ case 12:
+ case 13:
+ diskpage.pointer->swh.magic.magic[5] |= 0x80;
+ break;
+ }
+
+ suspend_bio_ops.bdev_page_io(WRITE, resume_block_device,
+ resume_firstblock,
+ virt_to_page(diskpage.ptr));
+ suspend_bio_ops.finish_all_io();
+ free_page(diskpage.address);
+
+ close_bdevs();
+ return;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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