blob: 4ef68e2aa7571793dff687a3091bbcbd4ac6f4d4 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0
* kernel/crash_dump.c - Memory preserving reboot related code.
* Created by: Simon Horman <>
* Original code moved from kernel/crash.c
* Original code comment copied from the i386 version of this file
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/crash_dump.h>
#include <linux/uio.h>
#include <asm/page.h>
ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn,
size_t csize, unsigned long offset)
void *vaddr;
if (!csize)
return 0;
vaddr = __va(pfn<<PAGE_SHIFT);
csize = copy_to_iter(vaddr + offset, csize, iter);
return csize;