Theodore Tso wrote:
+struct page *rmem_vma_nopage(struct vm_area_struct *vma,
+ unsigned long address, int *type)
+{
+ struct page *pageptr;
+ unsigned long offset = vma->vm_pgoff << PAGE_SHIFT;
+ unsigned long physaddr = address - vma->vm_start + offset;
+ unsigned long pageframe = physaddr >> PAGE_SHIFT;
+
+ if (!pfn_valid(pageframe))
+ return NOPAGE_SIGBUS;
+ pageptr = pfn_to_page(pageframe);
+ get_page(pageptr);
+ if (type)
+ *type = VM_FAULT_MINOR;
+ return pageptr;
+}
This won't work because struct page could easily be a free page.
I think /dev/mem should be able to remap physical memory now that
PG_reserved is gone.
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