[IA64] sanity check reserved region usage

One more trivial, stand-alone patch from the Xen/ia64 review.  Sanity
check usage of the reserved region numbers.

Signed-off-by: Alex Williamson <alex.williamson@hp.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index e4dfda1eb7dd..6dba2d63f24d 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -260,6 +260,7 @@ reserve_memory (void)
         n++;
 
         num_rsvd_regions = n;
+        BUG_ON(IA64_MAX_RSVD_REGIONS + 1 < n);
 
         sort_regions(rsvd_region, num_rsvd_regions);
 }