diff options
Diffstat (limited to 'arch/arm/kernel/crash_dump.c')
-rw-r--r-- | arch/arm/kernel/crash_dump.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/arch/arm/kernel/crash_dump.c b/arch/arm/kernel/crash_dump.c new file mode 100644 index 000000000..938bd932d --- /dev/null +++ b/arch/arm/kernel/crash_dump.c @@ -0,0 +1,35 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * arch/arm/kernel/crash_dump.c + * + * Copyright (C) 2010 Nokia Corporation. + * Author: Mika Westerberg + * + * This code is taken from arch/x86/kernel/crash_dump_64.c + * Created by: Hariprasad Nellitheertha (hari@in.ibm.com) + * Copyright (C) IBM Corporation, 2004. All rights reserved + */ + +#include <linux/errno.h> +#include <linux/crash_dump.h> +#include <linux/uaccess.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 = ioremap(__pfn_to_phys(pfn), PAGE_SIZE); + if (!vaddr) + return -ENOMEM; + + csize = copy_to_iter(vaddr + offset, csize, iter); + + iounmap(vaddr); + return csize; +} |