Initial Contribution
msm-2.6.38: tag AU_LINUX_ANDROID_GINGERBREAD.02.03.04.00.142
Signed-off-by: Bryan Huntsman <bryanh@codeaurora.org>
diff --git a/drivers/misc/msm_migrate_pages.c b/drivers/misc/msm_migrate_pages.c
new file mode 100644
index 0000000..df7af5f
--- /dev/null
+++ b/drivers/misc/msm_migrate_pages.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2010, Code Aurora Forum. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/platform_device.h>
+#include <linux/memory.h>
+#include <linux/memory_hotplug.h>
+#include <mach/msm_migrate_pages.h>
+
+static unsigned long unstable_memory_state;
+
+unsigned long get_msm_migrate_pages_status(void)
+{
+ return unstable_memory_state;
+}
+EXPORT_SYMBOL(get_msm_migrate_pages_status);
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+static int migrate_pages_callback(struct notifier_block *self,
+ unsigned long action, void *arg)
+{
+ int ret = 0;
+
+ switch (action) {
+ case MEM_ONLINE:
+ unstable_memory_state = action;
+ break;
+ case MEM_OFFLINE:
+ unstable_memory_state = action;
+ break;
+ case MEM_GOING_OFFLINE:
+ case MEM_GOING_ONLINE:
+ case MEM_CANCEL_ONLINE:
+ case MEM_CANCEL_OFFLINE:
+ break;
+ }
+ return ret;
+}
+#endif
+
+static int __devinit msm_migrate_pages_probe(struct platform_device *pdev)
+{
+#ifdef CONFIG_MEMORY_HOTPLUG
+ hotplug_memory_notifier(migrate_pages_callback, 0);
+#endif
+ unstable_memory_state = 0;
+ return 0;
+}
+
+static struct platform_driver msm_migrate_pages_driver = {
+ .probe = msm_migrate_pages_probe,
+ .driver = {
+ .name = "msm_migrate_pages",
+ },
+};
+
+static int __init msm_migrate_pages_init(void)
+{
+ return platform_driver_register(&msm_migrate_pages_driver);
+}
+
+static void __exit msm_migrate_pages_exit(void)
+{
+ platform_driver_unregister(&msm_migrate_pages_driver);
+}
+
+module_init(msm_migrate_pages_init);
+module_exit(msm_migrate_pages_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Get Status of Unstable Memory Region");