x86/mm: address violations of MISRA C Rule 20.7

MISRA C Rule 20.7 states: "Expressions resulting from the expansion
of macro parameters shall be enclosed in parentheses". Therefore, some
macro definitions should gain additional parentheses to ensure that all
current and future users will be safe with respect to expansions that
can possibly alter the semantics of the passed-in macro parameter.

No functional change.

Signed-off-by: Nicola Vetrini <nicola.vetrini@bugseng.com>
Acked-by: Jan Beulich <jbeulich@suse.com>

diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index 9141912ae52dddda0c38f7220e7061578cba3fbb..87529db7d13659534ea3f04de358708321f1cba9 100644 (file)
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -162,7 +162,7 @@ static uint32_t base_disallow_mask;
 #define L4_DISALLOW_MASK (base_disallow_mask)
 
 #define l1_disallow_mask(d)                                     \
-    ((d != dom_io) &&                                           \
+    (((d) != dom_io) &&                                         \
      (rangeset_is_empty((d)->iomem_caps) &&                     \
       rangeset_is_empty((d)->arch.ioport_caps) &&               \
       !has_arch_pdevs(d) &&                                     \