[PATCH] x86_64: Fix off by one in e820_mapped

[Eric W. Biederman]

This allows a valid iommu placed immediately after memory
to work, to be recognized as after the last byte of memory
and not overlapping it.

Signed-off-by: Eric W. Biederman <ebiederm@xxxxxxxxxxxx>
---

 arch/x86_64/kernel/e820.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

a0929b87b8d0d059a10eb3e61da3d679d64980e1
diff --git a/arch/x86_64/kernel/e820.c b/arch/x86_64/kernel/e820.c
--- a/arch/x86_64/kernel/e820.c
+++ b/arch/x86_64/kernel/e820.c
@@ -85,7 +85,7 @@ int __init e820_mapped(unsigned long sta
 		struct e820entry *ei = &e820.map[i]; 
 		if (type && ei->type != type) 
 			continue;
-		if (ei->addr >= end || ei->addr + ei->size < start) 
+		if (ei->addr >= end || ei->addr + ei->size <= start) 
 			continue; 
 		return 1; 
 	} 
-
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