From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Mosberger <davidm@napali.hpl.hp.com>
Date: Wed, 09 Apr 2003 17:45:45 +0000
Subject: RE: [Linux-ia64] mmap crashes system after mapping PCI device into user space and reading and writin
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>>>>> On Wed, 9 Apr 2003 01:36:33 -0400, "Mike Fox" <mfox@annapmicro.com> said:

  Mike> In the driver I am basically doing this in my mmap entry point:

  Mike>   vma-> vm_page_prot = pgprot_noncached(vma->vm_page_prot);
  Mike>   vma-> vm_flags |= VM_IO;

  Mike> /*
  Mike> * this maps the physical memory to the user
  Mike> */
  Mike> if (remap_page_range(vma->vm_start, offset, vma->vm_end-vma->vm_start, vma->vm_page_prot))
  Mike> {
  Mike>     return -EAGAIN;
  Mike> }

This is basically what drivers/char/mem.c is doing, so there is
nothing obviously wrong here.

	--david