1 files changed, 28 insertions, 1 deletions

diff --git a/arch/powerpc/platforms/pseries/cmm.c b/arch/powerpc/platforms/pseries/cmm.c
index 5cd4d2761620..6567439fe78d 100644
--- a/arch/powerpc/platforms/pseries/cmm.c
+++ b/arch/powerpc/platforms/pseries/cmm.c
@@ -28,6 +28,7 @@
 #include <linux/kthread.h>
 #include <linux/module.h>
 #include <linux/oom.h>
+#include <linux/reboot.h>
 #include <linux/sched.h>
 #include <linux/stringify.h>
 #include <linux/swap.h>
@@ -384,6 +385,26 @@ static void cmm_unregister_sysfs(struct sys_device *sysdev)
 }
 
 /**
+ * cmm_reboot_notifier - Make sure pages are not still marked as "loaned"
+ *
+ **/
+static int cmm_reboot_notifier(struct notifier_block *nb,
+                               unsigned long action, void *unused)
+{
+        if (action == SYS_RESTART) {
+                if (cmm_thread_ptr)
+                        kthread_stop(cmm_thread_ptr);
+                cmm_thread_ptr = NULL;
+                cmm_free_pages(loaned_pages);
+        }
+        return NOTIFY_DONE;
+}
+
+static struct notifier_block cmm_reboot_nb = {
+        .notifier_call = cmm_reboot_notifier,
+};
+
+/**
  * cmm_init - Module initialization
  *
  * Return value:
@@ -399,9 +420,12 @@ static int cmm_init(void)
         if ((rc = register_oom_notifier(&cmm_oom_nb)) < 0)
                 return rc;
 
-        if ((rc = cmm_sysfs_register(&cmm_sysdev)))
+        if ((rc = register_reboot_notifier(&cmm_reboot_nb)))
                 goto out_oom_notifier;
 
+        if ((rc = cmm_sysfs_register(&cmm_sysdev)))
+                goto out_reboot_notifier;
+
         if (cmm_disabled)
                 return rc;
 
@@ -415,6 +439,8 @@ static int cmm_init(void)
 
 out_unregister_sysfs:
         cmm_unregister_sysfs(&cmm_sysdev);
+out_reboot_notifier:
+        unregister_reboot_notifier(&cmm_reboot_nb);
 out_oom_notifier:
         unregister_oom_notifier(&cmm_oom_nb);
         return rc;
@@ -431,6 +457,7 @@ static void cmm_exit(void)
         if (cmm_thread_ptr)
                 kthread_stop(cmm_thread_ptr);
         unregister_oom_notifier(&cmm_oom_nb);
+        unregister_reboot_notifier(&cmm_reboot_nb);
         cmm_free_pages(loaned_pages);
         cmm_unregister_sysfs(&cmm_sysdev);
 }