[reactos] 01/12: [NTOS:MM] Remove some dead code from legacy Mm

[Jérôme Gardou]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=82dd1afe33dda96e2dd52…

commit 82dd1afe33dda96e2dd52e249335ef563009575e
Author:     Jérôme Gardou <jerome.gardou(a)reactos.org>
AuthorDate: Mon Apr 26 18:18:23 2021 +0200
Commit:     Jérôme Gardou <zefklop(a)users.noreply.github.com>
CommitDate: Wed Jun 9 11:27:18 2021 +0200

    [NTOS:MM] Remove some dead code from legacy Mm
---
 ntoskrnl/include/internal/mm.h |  2 +-
 ntoskrnl/mm/ARM3/procsup.c     |  8 ++++-
 ntoskrnl/mm/balance.c          | 33 -------------------
 ntoskrnl/mm/marea.c            | 72 ------------------------------------------
 4 files changed, 8 insertions(+), 107 deletions(-)

diff --git a/ntoskrnl/include/internal/mm.h b/ntoskrnl/include/internal/mm.h
index c3391191a17..a68359da713 100644
--- a/ntoskrnl/include/internal/mm.h
+++ b/ntoskrnl/include/internal/mm.h
@@ -744,7 +744,7 @@ VOID
 NTAPI
 MmCleanProcessAddressSpace(IN PEPROCESS Process);
 
-NTSTATUS
+VOID
 NTAPI
 MmDeleteProcessAddressSpace(IN PEPROCESS Process);
 
diff --git a/ntoskrnl/mm/ARM3/procsup.c b/ntoskrnl/mm/ARM3/procsup.c
index c7abed0c794..2fc8dccae54 100644
--- a/ntoskrnl/mm/ARM3/procsup.c
+++ b/ntoskrnl/mm/ARM3/procsup.c
@@ -1326,12 +1326,18 @@ MmCleanProcessAddressSpace(IN PEPROCESS Process)
 
 VOID
 NTAPI
-MmDeleteProcessAddressSpace2(IN PEPROCESS Process)
+MmDeleteProcessAddressSpace(IN PEPROCESS Process)
 {
     PMMPFN Pfn1, Pfn2;
     KIRQL OldIrql;
     PFN_NUMBER PageFrameIndex;
 
+#ifndef _M_AMD64
+    OldIrql = MiAcquireExpansionLock();
+    RemoveEntryList(&Process->MmProcessLinks);
+    MiReleaseExpansionLock(OldIrql);
+#endif
+
     //ASSERT(Process->CommitCharge == 0);
 
     /* Remove us from the list */
diff --git a/ntoskrnl/mm/balance.c b/ntoskrnl/mm/balance.c
index 93b05138df3..e6f1313b03f 100644
--- a/ntoskrnl/mm/balance.c
+++ b/ntoskrnl/mm/balance.c
@@ -254,13 +254,6 @@ MmTrimUserMemory(ULONG Target, ULONG Priority, PULONG NrFreedPages)
     return STATUS_SUCCESS;
 }
 
-static BOOLEAN
-MiIsBalancerThread(VOID)
-{
-    return (MiBalancerThreadHandle != NULL) &&
-           (PsGetCurrentThreadId() == MiBalancerThreadId.UniqueThread);
-}
-
 VOID
 NTAPI
 MmRebalanceMemoryConsumers(VOID)
@@ -320,32 +313,6 @@ MiBalancerThread(PVOID Unused)
         {
             ULONG InitialTarget = 0;
 
-#if (_MI_PAGING_LEVELS == 2)
-            if (!MiIsBalancerThread())
-            {
-                /* Clean up the unused PDEs */
-                ULONG_PTR Address;
-                PEPROCESS Process = PsGetCurrentProcess();
-
-                /* Acquire PFN lock */
-                KIRQL OldIrql = MiAcquirePfnLock();
-                PMMPDE pointerPde;
-                for (Address = (ULONG_PTR)MI_LOWEST_VAD_ADDRESS;
-                     Address < (ULONG_PTR)MM_HIGHEST_VAD_ADDRESS;
-                     Address += PTE_PER_PAGE * PAGE_SIZE)
-                {
-                    if (MiQueryPageTableReferences((PVOID)Address) == 0)
-                    {
-                        pointerPde = MiAddressToPde(Address);
-                        if (pointerPde->u.Hard.Valid)
-                            MiDeletePte(pointerPde, MiPdeToPte(pointerPde), Process,
NULL);
-                        ASSERT(pointerPde->u.Hard.Valid == 0);
-                    }
-                }
-                /* Release lock */
-                MiReleasePfnLock(OldIrql);
-            }
-#endif
             do
             {
                 ULONG OldTarget = InitialTarget;
diff --git a/ntoskrnl/mm/marea.c b/ntoskrnl/mm/marea.c
index 1942dd76b27..78d07c75cd6 100644
--- a/ntoskrnl/mm/marea.c
+++ b/ntoskrnl/mm/marea.c
@@ -547,76 +547,4 @@ MiRosCleanupMemoryArea(
     /* Make sure this worked! */
     ASSERT(NT_SUCCESS(Status));
 }
-
-VOID
-NTAPI
-MmDeleteProcessAddressSpace2(IN PEPROCESS Process);
-
-NTSTATUS
-NTAPI
-MmDeleteProcessAddressSpace(PEPROCESS Process)
-{
-#ifndef _M_AMD64
-    KIRQL OldIrql;
-#endif
-
-    DPRINT("MmDeleteProcessAddressSpace(Process %p (%s))\n", Process,
-           Process->ImageFileName);
-
-#ifndef _M_AMD64
-    OldIrql = MiAcquireExpansionLock();
-    RemoveEntryList(&Process->MmProcessLinks);
-    MiReleaseExpansionLock(OldIrql);
-#endif
-    MmLockAddressSpace(&Process->Vm);
-
-#if (_MI_PAGING_LEVELS == 2)
-    {
-        KIRQL OldIrql;
-        PVOID Address;
-        PMMPDE pointerPde;
-
-        /* Attach to Process */
-        KeAttachProcess(&Process->Pcb);
-
-        /* Acquire PFN lock */
-        OldIrql = MiAcquirePfnLock();
-
-        for (Address = MI_LOWEST_VAD_ADDRESS;
-             Address < MM_HIGHEST_VAD_ADDRESS;
-             Address = (PVOID)((ULONG_PTR)Address + (PTE_PER_PAGE * PAGE_SIZE)))
-        {
-            /* At this point all references should be dead */
-            if (MiQueryPageTableReferences(Address) != 0)
-            {
-                DPRINT1("Process %p, Address %p, UsedPageTableEntries %lu\n",
-                        Process,
-                        Address,
-                        MiQueryPageTableReferences(Address));
-                ASSERT(MiQueryPageTableReferences(Address) == 0);
-            }
-
-            pointerPde = MiAddressToPde(Address);
-            /* Unlike in ARM3, we don't necesarrily free the PDE page as soon as
reference reaches 0,
-             * so we must clean up a bit when process closes */
-            if (pointerPde->u.Hard.Valid)
-                MiDeletePte(pointerPde, MiPdeToPte(pointerPde), Process, NULL);
-            ASSERT(pointerPde->u.Hard.Valid == 0);
-        }
-
-        /* Release lock */
-        MiReleasePfnLock(OldIrql);
-
-        /* Detach */
-        KeDetachProcess();
-    }
-#endif
-
-    MmUnlockAddressSpace(&Process->Vm);
-
-    DPRINT("Finished MmDeleteProcessAddressSpace()\n");
-    MmDeleteProcessAddressSpace2(Process);
-    return(STATUS_SUCCESS);
-}
-
 /* EOF */