3 files changed, 28 insertions, 7 deletions

diff --git a/drivers/xen/manage.c b/drivers/xen/manage.c
index 624e8dc24532..fc6c94c0b436 100644
--- a/drivers/xen/manage.c
+++ b/drivers/xen/manage.c
@@ -46,6 +46,20 @@ struct suspend_info {
         void (*post)(int cancelled);
 };
 
+static RAW_NOTIFIER_HEAD(xen_resume_notifier);
+
+void xen_resume_notifier_register(struct notifier_block *nb)
+{
+        raw_notifier_chain_register(&xen_resume_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(xen_resume_notifier_register);
+
+void xen_resume_notifier_unregister(struct notifier_block *nb)
+{
+        raw_notifier_chain_unregister(&xen_resume_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(xen_resume_notifier_unregister);
+
 #ifdef CONFIG_HIBERNATE_CALLBACKS
 static void xen_hvm_post_suspend(int cancelled)
 {
@@ -152,6 +166,8 @@ static void do_suspend(void)
 
         err = stop_machine(xen_suspend, &si, cpumask_of(0));
 
+        raw_notifier_call_chain(&xen_resume_notifier, 0, NULL);
+
         dpm_resume_start(si.cancelled ? PMSG_THAW : PMSG_RESTORE);
 
         if (err) {
diff --git a/drivers/xen/xen-acpi-processor.c b/drivers/xen/xen-acpi-processor.c
index 7231859119f1..82358d14ecf1 100644
--- a/drivers/xen/xen-acpi-processor.c
+++ b/drivers/xen/xen-acpi-processor.c
@@ -27,10 +27,10 @@
 #include <linux/init.h>
 #include <linux/module.h>
 #include <linux/types.h>
-#include <linux/syscore_ops.h>
 #include <linux/acpi.h>
 #include <acpi/processor.h>
 #include <xen/xen.h>
+#include <xen/xen-ops.h>
 #include <xen/interface/platform.h>
 #include <asm/xen/hypercall.h>
 
@@ -495,14 +495,15 @@ static int xen_upload_processor_pm_data(void)
         return rc;
 }
 
-static void xen_acpi_processor_resume(void)
+static int xen_acpi_processor_resume(struct notifier_block *nb,
+                                     unsigned long action, void *data)
 {
         bitmap_zero(acpi_ids_done, nr_acpi_bits);
-        xen_upload_processor_pm_data();
+        return xen_upload_processor_pm_data();
 }
 
-static struct syscore_ops xap_syscore_ops = {
-        .resume = xen_acpi_processor_resume,
+struct notifier_block xen_acpi_processor_resume_nb = {
+        .notifier_call = xen_acpi_processor_resume,
 };
 
 static int __init xen_acpi_processor_init(void)
@@ -555,7 +556,7 @@ static int __init xen_acpi_processor_init(void)
         if (rc)
                 goto err_unregister;
 
-        register_syscore_ops(&xap_syscore_ops);
+        xen_resume_notifier_register(&xen_acpi_processor_resume_nb);
 
         return 0;
 err_unregister:
@@ -574,7 +575,7 @@ static void __exit xen_acpi_processor_exit(void)
 {
         int i;
 
-        unregister_syscore_ops(&xap_syscore_ops);
+        xen_resume_notifier_unregister(&xen_acpi_processor_resume_nb);
         kfree(acpi_ids_done);
         kfree(acpi_id_present);
         kfree(acpi_id_cst_present);
diff --git a/include/xen/xen-ops.h b/include/xen/xen-ops.h
index fb2ea8f26552..2cf47175b12b 100644
--- a/include/xen/xen-ops.h
+++ b/include/xen/xen-ops.h
@@ -2,6 +2,7 @@
 #define INCLUDE_XEN_OPS_H
 
 #include <linux/percpu.h>
+#include <linux/notifier.h>
 #include <asm/xen/interface.h>
 
 DECLARE_PER_CPU(struct vcpu_info *, xen_vcpu);
@@ -16,6 +17,9 @@ void xen_mm_unpin_all(void);
 void xen_timer_resume(void);
 void xen_arch_resume(void);
 
+void xen_resume_notifier_register(struct notifier_block *nb);
+void xen_resume_notifier_unregister(struct notifier_block *nb);
+
 int xen_setup_shutdown_event(void);
 
 extern unsigned long *xen_contiguous_bitmap;