path: root/mm/migrate_device.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Device Memory Migration functionality.
 *
 * Originally written by Jérôme Glisse.
 */
#include <linux/export.h>
#include <linux/memremap.h>
#include <linux/migrate.h>
#include <linux/mm.h>
#include <linux/mm_inline.h>
#include <linux/mmu_notifier.h>
#include <linux/oom.h>
#include <linux/pagewalk.h>
#include <linux/rmap.h>
#include <linux/leafops.h>
#include <linux/pgalloc.h>
#include <asm/tlbflush.h>
#include "internal.h"

static int migrate_vma_collect_skip(unsigned long start,
				    unsigned long end,
				    struct mm_walk *walk)
{
	struct migrate_vma *migrate = walk->private;
	unsigned long addr;

	for (addr = start; addr < end; addr += PAGE_SIZE) {
		migrate->dst[migrate->npages] = 0;
		migrate->src[migrate->npages++] = 0;