VM_FLAG( write,           0 )
VM_FLAG( exec,            1 )

VM_FLAG( contiguous,      4 )
VM_FLAG( large_pages,     5 )
VM_FLAG( huge_pages,      6 )

VM_FLAG( write_combine,   8 )

VM_FLAG( mmio,            12 )

VM_FLAG( exact,           16 )
VM_FLAG( ring,            17 )