Hi,
That one is obviously needed to make pae xen-linux work with
more than 4GB.
Gerd
diff -urp
xen-2005-08-08-vanilla/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h
xen-2005-08-08/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h
---
xen-2005-08-08-vanilla/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h
2005-07-13 15:06:39.000000000 +0200
+++
xen-2005-08-08/linux-2.6-xen-sparse/include/asm-xen/asm-i386/pgtable-3level.h
2005-08-08 15:03:05.000000000 +0200
@@ -132,7 +132,8 @@ static inline int pte_none(pte_t pte)
#define INVALID_P2M_ENTRY (~0U)
#define FOREIGN_FRAME(_m) ((_m) | (1UL<<((sizeof(unsigned long)*8)-1)))
-#define pte_mfn(_pte) ((_pte).pte_low >> PAGE_SHIFT) /* FIXME */
+#define pte_mfn(_pte) ( ((_pte).pte_low >> PAGE_SHIFT) |\
+ (((_pte).pte_high & 0xfff) << (32-PAGE_SHIFT)) )
#define pte_pfn(_pte) \
({ \
unsigned long mfn = pte_mfn(_pte); \
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