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Subject[Suspend2][ 14/35] [Suspend2] Allocate filewriter header storage
Date
Having already allocated storage, set aside a number of pages at the start
of the image for the header and record where pageset2 will start.

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

kernel/power/suspend_file.c | 21 +++++++++++++++++++++
1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/kernel/power/suspend_file.c b/kernel/power/suspend_file.c
index 257acca..6b04eb5 100644
--- a/kernel/power/suspend_file.c
+++ b/kernel/power/suspend_file.c
@@ -427,3 +427,24 @@ static int filewriter_release_storage(vo
return 0;
}

+static int filewriter_allocate_header_space(int space_requested)
+{
+ int i;
+
+ if (!block_chain.first)
+ return 0;
+
+ suspend_extent_state_goto_start(&suspend_writer_posn);
+ suspend_bio_ops.forward_one_page(); /* To first page */
+
+ for (i = 0; i < space_requested; i++)
+ if (suspend_bio_ops.forward_one_page())
+ return -ENOSPC;
+
+ /* The end of header pages will be the start of pageset 2 */
+ suspend_extent_state_save(&suspend_writer_posn,
+ &suspend_writer_posn_save[2]);
+ header_pages = space_requested;
+ return 0;
+}
+
--
Nigel Cunningham nigel at suspend2 dot net
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