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35 lines
782 B
35 lines
782 B
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* arch/arm/kernel/crash_dump.c |
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* |
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* Copyright (C) 2010 Nokia Corporation. |
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* Author: Mika Westerberg |
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* |
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* This code is taken from arch/x86/kernel/crash_dump_64.c |
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* Created by: Hariprasad Nellitheertha ([email protected]) |
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* Copyright (C) IBM Corporation, 2004. All rights reserved |
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*/ |
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#include <linux/errno.h> |
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#include <linux/crash_dump.h> |
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#include <linux/uaccess.h> |
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#include <linux/io.h> |
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#include <linux/uio.h> |
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ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn, |
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size_t csize, unsigned long offset) |
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{ |
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void *vaddr; |
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if (!csize) |
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return 0; |
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vaddr = ioremap(__pfn_to_phys(pfn), PAGE_SIZE); |
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if (!vaddr) |
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return -ENOMEM; |
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csize = copy_to_iter(vaddr + offset, csize, iter); |
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iounmap(vaddr); |
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return csize; |
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}
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