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Trying to use r39938 variant again...

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svn path=/trunk/; revision=40020
This commit is contained in:
Dmitry Gorbachev 2009-03-15 01:23:47 +00:00
parent a49345f0c1
commit 0f6f0fe19a
1 changed files with 6 additions and 30 deletions
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36
reactos/ntoskrnl/mm/hypermap.c
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@ -139,7 +139,6 @@ MiMapPageToZeroInHyperSpace(IN PFN_NUMBER Page)
{
MMPTE TempPte;
PMMPTE PointerPte;
PFN_NUMBER Offset;
PVOID Address;
//
@ -154,47 +153,24 @@ MiMapPageToZeroInHyperSpace(IN PFN_NUMBER Page)
TempPte.u.Hard.PageFrameNumber = Page;
//
// Pick the first zeroing PTE
// Get the Zero PTE and its address
//
PointerPte = MmFirstReservedZeroingPte;
PointerPte = MiAddressToPte(MI_ZERO_PTE);
Address = (PVOID)((ULONG_PTR)PointerPte << 10);
//
// Now get the first free PTE
// Invalidate the old address
//
Offset = PFN_FROM_PTE(PointerPte);
if (!Offset)
{
//
// Reset the PTEs
//
Offset = MI_ZEROING_PTES;
KeFlushProcessTb();
}
//
// Prepare the next PTE
//
PointerPte->u.Hard.PageFrameNumber = Offset - 1;
__invlpg(Address);
//
// Write the current PTE
//
PointerPte += Offset;
TempPte.u.Hard.PageFrameNumber = Page;
*PointerPte = TempPte;
//
// Return the address
//
Address = (PVOID)((ULONG_PTR)PointerPte << 10);
return Address;
}
VOID
NTAPI
MiUnmapPageInZeroSpace(IN PVOID Address)
{
//
// Blow away the mapping
//
MiAddressToPte(Address)->u.Long = 0;
}