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That one is obviously needed to make pae xen-linux work with
more than 4GB.
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kaf24@firebug.cl.cam.ac.uk committed
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@@ -132,7 +132,8 @@ static inline int pte_none(pte_t pte)
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#define INVALID_P2M_ENTRY (~0U)
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#define FOREIGN_FRAME(_m) ((_m) | (1UL<<((sizeof(unsigned long)*8)-1)))
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#define pte_mfn(_pte) ((_pte).pte_low >> PAGE_SHIFT) /* FIXME */
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#define pte_mfn(_pte) ( ((_pte).pte_low >> PAGE_SHIFT) |\
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(((_pte).pte_high & 0xfff) << (32-PAGE_SHIFT)) )
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#define pte_pfn(_pte) \
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({ \
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unsigned long mfn = pte_mfn(_pte); \
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