[XEN PATCH] xen/types: address Rule 10.1 for macro BITS_TO_LONGS

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

Given its use in the declaration
'DECLARE_BITMAP(features, IOMMU_FEAT_count)' the argument
'bits' has essential type 'enum iommu_feature', which is not
allowed by the Rule as an operand to the addition operator.
Given that its value can be represented by a signed integer,
the explicit cast resolves the violation.

Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
---
 xen/include/xen/types.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/include/xen/types.h b/xen/include/xen/types.h
index aea259db1ef2..2ff8f243908d 100644
--- a/xen/include/xen/types.h
+++ b/xen/include/xen/types.h
@@ -23,7 +23,7 @@ typedef signed long ssize_t;
 typedef __PTRDIFF_TYPE__ ptrdiff_t;
 
 #define BITS_TO_LONGS(bits) \
-    (((bits)+BITS_PER_LONG-1)/BITS_PER_LONG)
+    (((int)(bits)+BITS_PER_LONG-1)/BITS_PER_LONG)
 #define DECLARE_BITMAP(name,bits) \
     unsigned long name[BITS_TO_LONGS(bits)]
 
-- 
2.34.1