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-rw-r--r--arch/s390/kernel/machine_kexec.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c
index b3de27700016..ac2178161ec3 100644
--- a/arch/s390/kernel/machine_kexec.c
+++ b/arch/s390/kernel/machine_kexec.c
@@ -13,6 +13,7 @@
#include <linux/reboot.h>
#include <linux/ftrace.h>
#include <linux/debug_locks.h>
+#include <linux/suspend.h>
#include <asm/cio.h>
#include <asm/setup.h>
#include <asm/pgtable.h>
@@ -67,6 +68,35 @@ void setup_regs(void)
memcpy((void *) SAVE_AREA_BASE, (void *) sa, sizeof(struct save_area));
}
+/*
+ * PM notifier callback for kdump
+ */
+static int machine_kdump_pm_cb(struct notifier_block *nb, unsigned long action,
+ void *ptr)
+{
+ switch (action) {
+ case PM_SUSPEND_PREPARE:
+ case PM_HIBERNATION_PREPARE:
+ if (crashk_res.start)
+ crash_map_reserved_pages();
+ break;
+ case PM_POST_SUSPEND:
+ case PM_POST_HIBERNATION:
+ if (crashk_res.start)
+ crash_unmap_reserved_pages();
+ break;
+ default:
+ return NOTIFY_DONE;
+ }
+ return NOTIFY_OK;
+}
+
+static int __init machine_kdump_pm_init(void)
+{
+ pm_notifier(machine_kdump_pm_cb, 0);
+ return 0;
+}
+arch_initcall(machine_kdump_pm_init);
#endif
/*