1 static int dmabuf_mmap(...)
   2 {
   3         size >>= PAGE_SHIFT;
   4         for(nr = 0; nr < size; nr++)
   5                 if (!db->sgbuf[nr])
   6                         return -EINVAL;
   7         db->mapped = 1;
   8         for (nr = 0; nr < size; nr++) {
   9                 unsigned long pfn;
  10 
  11                 pfn = virt_to_phys(db->sgbuf[nr]) >> PAGE_SHIFT;
  12                 if (remap_pfn_range(vma, start, pfn, PAGE_SIZE, prot))
  13                         return -EAGAIN;
  14                 start += PAGE_SIZE;
  15         }
  16         return 0;
  17 }