forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
27 lines
643 B
27 lines
643 B
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* crash_dump.c - Memory preserving reboot related code. |
|
* |
|
* Created by: Hariprasad Nellitheertha ([email protected]) |
|
* Copyright (C) IBM Corporation, 2004. All rights reserved |
|
*/ |
|
#include <linux/errno.h> |
|
#include <linux/crash_dump.h> |
|
#include <linux/io.h> |
|
#include <linux/uio.h> |
|
#include <linux/uaccess.h> |
|
|
|
ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn, |
|
size_t csize, unsigned long offset) |
|
{ |
|
void __iomem *vaddr; |
|
|
|
if (!csize) |
|
return 0; |
|
|
|
vaddr = ioremap(pfn << PAGE_SHIFT, PAGE_SIZE); |
|
csize = copy_to_iter(vaddr + offset, csize, iter); |
|
iounmap(vaddr); |
|
|
|
return csize; |
|
}
|
|
|