From 428b9e758c30a95154f5ad0d974894ef9ae133d6 Mon Sep 17 00:00:00 2001
From: Alex Smith <alex@alex-smith.me.uk>
Date: Wed, 4 Jul 2012 14:23:35 +0100
Subject: [PATCH] Check whether gX86PagingMethod is NULL in
 arch_vm_translation_map_is_kernel_page_accessible.

This means that the kernel debugger won't cause a recursive panic if a
panic occurs before vm_init().
---
 src/system/kernel/arch/x86/arch_vm_translation_map.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/system/kernel/arch/x86/arch_vm_translation_map.cpp b/src/system/kernel/arch/x86/arch_vm_translation_map.cpp
index aa20762e29..af3d64b248 100644
--- a/src/system/kernel/arch/x86/arch_vm_translation_map.cpp
+++ b/src/system/kernel/arch/x86/arch_vm_translation_map.cpp
@@ -144,5 +144,8 @@ bool
 arch_vm_translation_map_is_kernel_page_accessible(addr_t virtualAddress,
 	uint32 protection)
 {
+	if (!gX86PagingMethod)
+		return true;
+
 	return gX86PagingMethod->IsKernelPageAccessible(virtualAddress, protection);
 }