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authorHeiko Carstens <heiko.carstens@de.ibm.com>2008-06-10 04:03:20 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2008-06-10 04:03:27 -0400
commitee0ddadd086e25503f81be551c43f66472300acd (patch)
tree0f1606c133835abd3952af30efcee03230182139 /arch/s390/mm
parent12829126aa47758608578cc5be3a5adffc3d4b09 (diff)
[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 <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm')
-rw-r--r--arch/s390/mm/vmem.c2
1 files changed, 1 insertions, 1 deletions
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)
236{ 236{
237 struct memory_segment *tmp; 237 struct memory_segment *tmp;
238 238
239 if (seg->start + seg->size >= VMEM_MAX_PHYS || 239 if (seg->start + seg->size > VMEM_MAX_PHYS ||
240 seg->start + seg->size < seg->start) 240 seg->start + seg->size < seg->start)
241 return -ERANGE; 241 return -ERANGE;
242 242