82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
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/*
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* Copyright (c) 2010, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/platform_device.h>
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#include <linux/memory.h>
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#include <linux/memory_hotplug.h>
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#include <linux/module.h>
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#include <mach/msm_migrate_pages.h>
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static unsigned long unstable_memory_state;
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unsigned long get_msm_migrate_pages_status(void)
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{
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return unstable_memory_state;
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}
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EXPORT_SYMBOL(get_msm_migrate_pages_status);
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#ifdef CONFIG_MEMORY_HOTPLUG
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static int migrate_pages_callback(struct notifier_block *self,
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unsigned long action, void *arg)
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{
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int ret = 0;
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switch (action) {
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case MEM_ONLINE:
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unstable_memory_state = action;
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break;
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case MEM_OFFLINE:
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unstable_memory_state = action;
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break;
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case MEM_GOING_OFFLINE:
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case MEM_GOING_ONLINE:
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case MEM_CANCEL_ONLINE:
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case MEM_CANCEL_OFFLINE:
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break;
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}
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return ret;
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}
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#endif
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static int __devinit msm_migrate_pages_probe(struct platform_device *pdev)
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{
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#ifdef CONFIG_MEMORY_HOTPLUG
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hotplug_memory_notifier(migrate_pages_callback, 0);
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#endif
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unstable_memory_state = 0;
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return 0;
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}
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static struct platform_driver msm_migrate_pages_driver = {
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.probe = msm_migrate_pages_probe,
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.driver = {
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.name = "msm_migrate_pages",
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},
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};
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static int __init msm_migrate_pages_init(void)
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{
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return platform_driver_register(&msm_migrate_pages_driver);
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}
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static void __exit msm_migrate_pages_exit(void)
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{
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platform_driver_unregister(&msm_migrate_pages_driver);
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}
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module_init(msm_migrate_pages_init);
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module_exit(msm_migrate_pages_exit);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Get Status of Unstable Memory Region");
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