[S390] s390: hibernation support for s390

This patch introduces the hibernation backend support to the
s390 architecture. Now it is possible to suspend a mainframe Linux
guest using the following command:

echo disk > /sys/power/state

Signed-off-by: Hans-Joachim Picht <hans@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 30 insertions, 0 deletions

diff --git a/arch/s390/power/swsusp.c b/arch/s390/power/swsusp.c
new file mode 100644
index 000000000000..e6a4fe9f5f24
--- /dev/null
+++ b/arch/s390/power/swsusp.c
@@ -0,0 +1,30 @@
+/*
+ * Support for suspend and resume on s390
+ *
+ * Copyright IBM Corp. 2009
+ *
+ * Author(s): Hans-Joachim Picht <hans@linux.vnet.ibm.com>
+ *
+ */
+
+
+/*
+ * save CPU registers before creating a hibernation image and before
+ * restoring the memory state from it
+ */
+void save_processor_state(void)
+{
+        /* implentation contained in the
+         * swsusp_arch_suspend function
+         */
+}
+
+/*
+ * restore the contents of CPU registers
+ */
+void restore_processor_state(void)
+{
+        /* implentation contained in the
+         * swsusp_arch_resume function
+         */
+}