From ee0ddadd086e25503f81be551c43f66472300acd Mon Sep 17 00:00:00 2001 From: Heiko Carstens Date: Tue, 10 Jun 2008 10:03:20 +0200 Subject: [PATCH] [S390] vmemmap: fix off-by-one bug. If a memory range is supposed to be added to the 1:1 mapping and it ends just below the maximum supported physical address it won't succeed. This is because a test doesn't consider that the end address is 1 smaller than start + size. Fix the comparison. Signed-off-by: Heiko Carstens Signed-off-by: Martin Schwidefsky --- arch/s390/mm/vmem.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c index f591188fa2c0..e4868bfc672f 100644 --- a/arch/s390/mm/vmem.c +++ b/arch/s390/mm/vmem.c @@ -236,7 +236,7 @@ static int insert_memory_segment(struct memory_segment *seg) { struct memory_segment *tmp; - if (seg->start + seg->size >= VMEM_MAX_PHYS || + if (seg->start + seg->size > VMEM_MAX_PHYS || seg->start + seg->size < seg->start) return -ERANGE; -- 2.20.1