[xen staging] xentrace: address violation of MISRA C Rule 20.7

[patchbot@xxxxxxx]

commit 7757981d94b78714a579b0983fa906b83d3bcd27
Author:     Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
AuthorDate: Wed Mar 27 09:10:23 2024 +0100
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Mar 27 09:10:23 2024 +0100

    xentrace: address violation 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@xxxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/include/public/trace.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/include/public/trace.h b/xen/include/public/trace.h
index 62a179971d..3c9f9c3c18 100644
--- a/xen/include/public/trace.h
+++ b/xen/include/public/trace.h
@@ -67,7 +67,7 @@
 #define TRC_SCHED_CLASS_EVT(_c, _e) \
   ( ( TRC_SCHED_CLASS | \
       ((TRC_SCHED_##_c << TRC_SCHED_ID_SHIFT) & TRC_SCHED_ID_MASK) ) + \
-    (_e & TRC_SCHED_EVT_MASK) )
+    ((_e) & TRC_SCHED_EVT_MASK) )
 
 /* Trace classes for DOM0 operations */
 #define TRC_DOM0_DOMOPS     0x00041000   /* Domains manipulations */
--
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