[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>

1 files changed, 1 insertions, 1 deletions

diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index f591188fa2c..e4868bfc672 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;