1 // SPDX-License-Identifier: GPL-2.0
3 * This code comes from arch/arm64/kernel/crash_dump.c
4 * Created by: AKASHI Takahiro <takahiro.akashi@linaro.org>
5 * Copyright (C) 2017 Linaro Limited
8 #include <linux/crash_dump.h>
10 #include <linux/uio.h>
12 ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn,
13 size_t csize, unsigned long offset)
20 vaddr = memremap(__pfn_to_phys(pfn), PAGE_SIZE, MEMREMAP_WB);
24 csize = copy_to_iter(vaddr + offset, csize, iter);