x86/hvm: 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/hvm/domain.c b/xen/arch/x86/hvm/domain.c
index 7f6e362a702eb2660527611924fc94d54aa77a89..048f29ae49117eb51095b9f7abee233905972bf9 100644 (file)
--- a/xen/arch/x86/hvm/domain.c
+++ b/xen/arch/x86/hvm/domain.c
@@ -132,9 +132,9 @@ int arch_set_info_hvm_guest(struct vcpu *v, const struct vcpu_hvm_context *ctx)
     s = (struct segment_register)                                           \
         { 0, { (r)->s ## _ar }, (r)->s ## _limit, (r)->s ## _base };        \
     /* Set accessed / busy bit for present segments. */                     \
-    if ( s.p )                                                              \
-        s.type |= (x86_seg_##s != x86_seg_tr ? 1 : 2);                      \
-    check_segment(&s, x86_seg_ ## s); })
+    if ( (s).p )                                                            \
+        (s).type |= (x86_seg_ ## s != x86_seg_tr ? 1 : 2);                  \
+    check_segment(&(s), x86_seg_ ## s); })
 
         rc = SEG(cs, regs);
         rc |= SEG(ds, regs);