[NTOS]: This is why you shouldn't let Antoine Dodson commit code.

Sir Richard · Sir Richard · commit efefc97901d2 · 2010-09-30T14:48:03.000Z
svn path=/trunk/; revision=48941
diff --git a/reactos/ntoskrnl/mm/ARM3/pagfault.c b/reactos/ntoskrnl/mm/ARM3/pagfault.c
@@ -111,7 +111,7 @@ MiCheckPdeForPagedPool(IN PVOID Address)
         // Copy it from our double-mapped system page directory
         //
         InterlockedExchangePte(PointerPde,
-                               MmSystemPagePtes[(ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)].u.Long);
+                               MmSystemPagePtes[((ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)) / sizeof(MMPTE)].u.Long);
 #endif
     }
     
diff --git a/reactos/ntoskrnl/mm/ARM3/pool.c b/reactos/ntoskrnl/mm/ARM3/pool.c
@@ -488,7 +488,7 @@ MiAllocatePoolPages(IN POOL_TYPE PoolType,
                 //
                 // Save it into our double-buffered system page directory
                 //
-                MmSystemPagePtes[(ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)] = TempPde;
+                MmSystemPagePtes[((ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)) / sizeof(MMPTE)] = TempPde;
                                             
                 /* Initialize the PFN */
                 MiInitializePfnForOtherProcess(PageFrameNumber,

Original file line number	Diff line number	Diff line change
`@@ -111,7 +111,7 @@ MiCheckPdeForPagedPool(IN PVOID Address)`
`111`	`111`	`// Copy it from our double-mapped system page directory`
`112`	`112`	`//`
`113`	`113`	`InterlockedExchangePte(PointerPde,`
`114`		`- MmSystemPagePtes[(ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)].u.Long);`
	`114`	`+ MmSystemPagePtes[((ULONG_PTR)PointerPde & (SYSTEM_PD_SIZE - 1)) / sizeof(MMPTE)].u.Long);`
`115`	`115`	`#endif`
`116`	`116`	`}`
`117`	`117`