From 9c7cd6877cf8db15269163deda69392263124c1e Mon Sep 17 00:00:00 2001
From: Mel Gorman <mel@skynet.ie>
Date: Wed, 27 Sep 2006 01:49:58 -0700
Subject: [PATCH] Account for holes that are outside the range of physical
 memory

absent_pages_in_range() made the assumption that users of the API would not
care about holes beyound the end of physical memory.  This was not the
case.  This patch will account for ranges outside of physical memory as
holes correctly.

Cc: Dave Hansen <haveblue@us.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Cc: Andi Kleen <ak@muc.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: "Keith Mannthey" <kmannth@gmail.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---
 arch/x86_64/mm/srat.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'arch/x86_64/mm')

diff --git a/arch/x86_64/mm/srat.c b/arch/x86_64/mm/srat.c
index 7b50bb1caabe..db1b2e11cf8f 100644
--- a/arch/x86_64/mm/srat.c
+++ b/arch/x86_64/mm/srat.c
@@ -227,7 +227,9 @@ static int reserve_hotadd(int node, unsigned long start, unsigned long end)
 
 	/* This check might be a bit too strict, but I'm keeping it for now. */
 	if (absent_pages_in_range(s_pfn, e_pfn) != e_pfn - s_pfn) {
-		printk(KERN_ERR "SRAT: Hotplug area has existing memory\n");
+		printk(KERN_ERR
+			"SRAT: Hotplug area %lu -> %lu has existing memory\n",
+			s_pfn, e_pfn);
 		return -1;
 	}
 
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