arch/mips/kernel/crash_dump.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/highmem.h>
   3 #include <linux/crash_dump.h>
   4 #include <linux/uio.h>
   5
   6 ssize_t copy_oldmem_page(struct iov_iter *iter, unsigned long pfn,
   7                          size_t csize, unsigned long offset)
   8 {
   9         void  *vaddr;
  10
  11         if (!csize)
  12                 return 0;
  13
  14         vaddr = kmap_local_pfn(pfn);
  15         csize = copy_to_iter(vaddr + offset, csize, iter);
  16         kunmap_local(vaddr);
  17
  18         return csize;
  19 }