From: John Hodge <tpg@portege.thepowersgang.com>
Date: Sun, 27 Sep 2009 03:46:17 +0000 (+0800)
Subject: Fixed MM_PageFault duplicating a page when it is only used once
X-Git-Tag: rel0.06~470
X-Git-Url: https://git.ucc.asn.au/?a=commitdiff_plain;h=db68d60fa72ff4b35bff9ca5191d4615fc142b34;p=tpg%2Facess2.git

Fixed MM_PageFault duplicating a page when it is only used once
---

diff --git a/Kernel/arch/x86/mm_virt.c b/Kernel/arch/x86/mm_virt.c
index 2e726ccf..b2520b52 100644
--- a/Kernel/arch/x86/mm_virt.c
+++ b/Kernel/arch/x86/mm_virt.c
@@ -105,7 +105,7 @@ void MM_PageFault(Uint Addr, Uint ErrorCode, tRegs *Regs)
 	 && gaPageTable[Addr>>12] & PF_COW )
 	{
 		tPAddr	paddr;
-		if(MM_GetRefCount( gaPageTable[Addr>>12] & ~0xFFF ) == 0)
+		if(MM_GetRefCount( gaPageTable[Addr>>12] & ~0xFFF ) == 1)
 		{
 			gaPageTable[Addr>>12] &= ~PF_COW;
 			gaPageTable[Addr>>12] |= PF_PRESENT|PF_WRITE;