[reactos] 01/01: [NTOS:MM] Do not map Process Working Set List in kernel space

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=7d0d14965ee8547d94ff7…

commit 7d0d14965ee8547d94ff7ce483c097543f53e505
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Wed May 19 22:20:38 2021 +0200
Commit:     Jérôme Gardou <zefklop(a)users.noreply.github.com>
CommitDate: Wed May 19 23:17:27 2021 +0200

    [NTOS:MM] Do not map Process Working Set List in kernel space
    
    This is not needed anymore and causes havoc on amd64
---
 ntoskrnl/mm/ARM3/procsup.c | 10 +---------
 1 file changed, 1 insertion(+), 9 deletions(-)

diff --git a/ntoskrnl/mm/ARM3/procsup.c b/ntoskrnl/mm/ARM3/procsup.c
index 5f24a8a0b95..c7abed0c794 100644
--- a/ntoskrnl/mm/ARM3/procsup.c
+++ b/ntoskrnl/mm/ARM3/procsup.c
@@ -916,7 +916,7 @@ MmInitializeProcessAddressSpace(IN PEPROCESS Process,
     PWCHAR Source;
     PCHAR Destination;
     USHORT Length = 0;
-    MMPTE TempPte;
+
 #if (_MI_PAGING_LEVELS >= 3)
     PMMPPE PointerPpe;
 #endif
@@ -1003,13 +1003,6 @@ MmInitializeProcessAddressSpace(IN PEPROCESS Process,
     /* Now initialize the working set list */
     MiInitializeWorkingSetList(&Process->Vm);
 
-    /* Map the process working set in kernel space */
-    /* FIXME: there should be no need */
-    PointerPte = MiReserveSystemPtes(1, SystemPteSpace);
-    MI_MAKE_HARDWARE_PTE_KERNEL(&TempPte, PointerPte, MM_READWRITE,
Process->WorkingSetPage);
-    MI_WRITE_VALID_PTE(PointerPte, TempPte);
-    Process->Vm.VmWorkingSetList = MiPteToAddress(PointerPte);
-
     /* The rule is that the owner process is always in the FLINK of the PDE's PFN
entry */
     Pfn = MiGetPfnEntry(Process->Pcb.DirectoryTableBase[0] >> PAGE_SHIFT);
     ASSERT(Pfn->u4.PteFrame == MiGetPfnEntryIndex(Pfn));
@@ -1361,7 +1354,6 @@ MmDeleteProcessAddressSpace2(IN PEPROCESS Process)
         MiDecrementShareCount(Pfn2, Pfn1->u4.PteFrame);
         MiDecrementShareCount(Pfn1, Process->WorkingSetPage);
         ASSERT((Pfn1->u3.e2.ReferenceCount == 0) ||
(Pfn1->u3.e1.WriteInProgress));
-        MiReleaseSystemPtes(MiAddressToPte(Process->Vm.VmWorkingSetList), 1,
SystemPteSpace);
 
         /* Now map hyperspace and its page table */
         PageFrameIndex = Process->Pcb.DirectoryTableBase[1] >> PAGE_SHIFT;