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Subject: [PATCH v3 6/6] x86: allocate space within a region top-down
To: Jesse Barnes <jbarnes@virtuousgeek.org>
From: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: Bob Picco <bpicco@redhat.com>, Brian Bloniarz <phunge0@hotmail.com>,
	Charles Butterfield <charles.butterfield@nextcentury.com>,
	Denys Vlasenko <dvlasenk@redhat.com>, linux-pci@vger.kernel.org,
	"Horst H. von Brand" <vonbrand@inf.utfsm.cl>,
	linux-kernel@vger.kernel.org, Stefan Becker <chemobejk@gmail.com>,
	"H. Peter Anvin" <hpa@zytor.com>, Yinghai Lu <yinghai@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Ingo Molnar <mingo@elte.hu>
Date: Wed, 13 Oct 2010 10:15:36 -0600
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diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 30a3e97..6cc02c4 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -35,6 +35,7 @@
   */
 
 #define ARCH_HAS_IOREMAP_WC
+#define ARCH_HAS_TOP_DOWN_ALLOC
 
 #include <linux/string.h>
 #include <linux/compiler.h>