[xen staging] x86/vPMU: address violations of MISRA C Rule 20.7

[patchbot@xxxxxxx]

commit a9b2a72926b85122c5eec628f54082e66812266e
Author:     Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
AuthorDate: Wed Apr 3 09:35:37 2024 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Wed Apr 3 09:35:37 2024 +0200

    x86/vPMU: 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>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
---
 xen/arch/x86/include/asm/vpmu.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xen/arch/x86/include/asm/vpmu.h b/xen/arch/x86/include/asm/vpmu.h
index f271f28e4a..dae9b43dac 100644
--- a/xen/arch/x86/include/asm/vpmu.h
+++ b/xen/arch/x86/include/asm/vpmu.h
@@ -23,8 +23,8 @@
 #define MSR_TYPE_ARCH_CTRL          4
 
 /* Start of PMU register bank */
-#define vpmu_reg_pointer(ctxt, offset) ((void *)((uintptr_t)ctxt + \
-                                                 (uintptr_t)ctxt->offset))
+#define vpmu_reg_pointer(ctxt, offset) ((void *)((uintptr_t)(ctxt) + \
+                                                 (uintptr_t)(ctxt)->offset))
 
 /* Arch specific operations shared by all vpmus */
 struct arch_vpmu_ops {
--
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