linux-imx

/*

 *  linux/mm/memory_hotplug.c

 *

 *  Copyright (C)

 */

​

#include <linux/stddef.h>

#include <linux/mm.h>

#include <linux/sched/signal.h>

#include <linux/swap.h>

#include <linux/interrupt.h>

#include <linux/pagemap.h>

#include <linux/compiler.h>

#include <linux/export.h>

#include <linux/pagevec.h>

#include <linux/writeback.h>

#include <linux/slab.h>

#include <linux/sysctl.h>

#include <linux/cpu.h>

#include <linux/memory.h>

#include <linux/memremap.h>

#include <linux/memory_hotplug.h>

#include <linux/highmem.h>

#include <linux/vmalloc.h>

#include <linux/ioport.h>

#include <linux/delay.h>

#include <linux/migrate.h>

#include <linux/page-isolation.h>

#include <linux/pfn.h>

#include <linux/suspend.h>

#include <linux/mm_inline.h>

#include <linux/firmware-map.h>

#include <linux/stop_machine.h>

#include <linux/hugetlb.h>

#include <linux/memblock.h>

#include <linux/compaction.h>

#include <linux/rmap.h>

​

#include <asm/tlbflush.h>

​

#include "internal.h"

​

/*

 * online_page_callback contains pointer to current page onlining function.

 * Initially it is generic_online_page(). If it is required it could be

 * changed by calling set_online_page_callback() for callback registration

 * and restore_online_page_callback() for generic callback restore.

 */

​

static void generic_online_page(struct page *page, unsigned int order);

​

static online_page_callback_t online_page_callback = generic_online_page;

static DEFINE_MUTEX(online_page_callback_lock);

​

DEFINE_STATIC_PERCPU_RWSEM(mem_hotplug_lock);

​

void get_online_mems(void)

{

    percpu_down_read(&mem_hotplug_lock);

}

​

void put_online_mems(void)

{