Cregit: Linux 5.19: crash

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Ralf Baechle	53	74.65%	1	25.00%
Matthew Wilcox	12	16.90%	1	25.00%
Youling Tang	5	7.04%	1	25.00%
Greg Kroah-Hartman	1	1.41%	1	25.00%
Total	71		4

// SPDX-License-Identifier: GPL-2.0
#include <linux/highmem.h>
#include <linux/crash_dump.h>
#include <linux/uio.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 = kmap_local_pfn(pfn);
	csize = copy_to_iter(vaddr + offset, csize, iter);
	kunmap_local(vaddr);

	return csize;
}

crash_dump.c