[xen staging] x86_64/cpu_idle: address violations of MISRA C Rule 20.7

[patchbot@xxxxxxx]

commit ced21fbb2842ac4655048bdee56232974ff9ff9c
Author:     Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
AuthorDate: Tue May 21 16:01:17 2024 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Tue May 21 16:01:17 2024 +0200

    x86_64/cpu_idle: 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@xxxxxxxxxxx>
    Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/x86_64/cpu_idle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/x86_64/cpu_idle.c b/xen/arch/x86/x86_64/cpu_idle.c
index fcd6fc0fc2..cc9febc03d 100644
--- a/xen/arch/x86/x86_64/cpu_idle.c
+++ b/xen/arch/x86/x86_64/cpu_idle.c
@@ -93,7 +93,7 @@ long compat_set_cx_pminfo(uint32_t acpi_id,
             return -EFAULT; \
         guest_from_compat_handle(states, (_s_)->states); \
 \
-        for ( i = 0; i < _s_->count; i++ ) \
+        for ( i = 0; i < (_s_)->count; i++ ) \
         { \
            if ( unlikely(copy_from_guest_offset(&state, states, i, 1)) ) \
                return -EFAULT; \
--
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