From 8494688eebecb287973569dc1261fd0741706324 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=A9r=C3=B4me=20Gardou?= <jerome.gardou@reactos.org>
Date: Thu, 18 Mar 2021 09:05:00 +0100
Subject: [PATCH] [NTOS:MM] Do not use atomic operations to set a bit while
 holding a lock.

Saving your fingers from typing it doesn't make it better code.
---
 ntoskrnl/mm/ARM3/expool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ntoskrnl/mm/ARM3/expool.c b/ntoskrnl/mm/ARM3/expool.c
index fb55f9159ba..95bc21ad822 100644
--- a/ntoskrnl/mm/ARM3/expool.c
+++ b/ntoskrnl/mm/ARM3/expool.c
@@ -1734,7 +1734,7 @@ ExpFindAndRemoveTagBigPages(IN PVOID Va,
     // Set the free bit, and decrement the number of allocations. Finally, release
     // the lock and return the tag that was located
     //
-    InterlockedIncrement((PLONG)&Entry->Va);
+    Entry->Va = (PVOID)((ULONG_PTR)Entry->Va | POOL_BIG_TABLE_ENTRY_FREE);
 
     ExpPoolBigEntriesInUse--;