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Commit 48c8b113 authored by Eric W. Biederman's avatar Eric W. Biederman Committed by Linus Torvalds
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[PATCH] x86_64: Fix off by one in e820_mapped 



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: default avatarEric W. Biederman <ebiederm@xmission.com>
Acked-by: default avatarAndi Kleen <ak@suse.de>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent a888cebe

arch/x86_64/kernel/e820.c

+1 −1
Original line number Diff line number Diff line
@@ -85,7 +85,7 @@ int __init e820_mapped(unsigned long start, unsigned long end, unsigned type) 
		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; 

	}