| 1 | |
| 2 | #include <linux/highmem.h>
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| 3 | #include <linux/crash_dump.h>
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| 4 | #include <linux/uio.h>
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| 5 |
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| 6 | ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn,
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| 7 | size_t csize, unsigned long offset)
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| 8 | {
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| 9 | void *vaddr;
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| 10 |
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| 11 | if (!csize)
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| 12 | return 0;
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| 13 |
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| 14 | vaddr = kmap_local_pfn(pfn);
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| 15 | csize = copy_to_iter(vaddr + offset, csize, iter);
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| 16 | kunmap_local(vaddr);
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| 17 |
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| 18 | return csize;
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| 19 | }
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