Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
29 lines
605 B
C
29 lines
605 B
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* This code comes from arch/arm64/kernel/crash_dump.c
|
|
* Created by: AKASHI Takahiro <takahiro.akashi@linaro.org>
|
|
* Copyright (C) 2017 Linaro Limited
|
|
*/
|
|
|
|
#include <linux/crash_dump.h>
|
|
#include <linux/io.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 = memremap(__pfn_to_phys(pfn), PAGE_SIZE, MEMREMAP_WB);
|
|
if (!vaddr)
|
|
return -ENOMEM;
|
|
|
|
csize = copy_to_iter(vaddr + offset, csize, iter);
|
|
|
|
memunmap(vaddr);
|
|
return csize;
|
|
}
|