[XEN PATCH 09/10] x86/debugreg: address violation of MISRA C Rule 20.7

[Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>]

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>
---
 xen/arch/x86/include/asm/debugreg.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/x86/include/asm/debugreg.h 
b/xen/arch/x86/include/asm/debugreg.h
index 2bdaf5d9aa11..96c406ad53c8 100644
--- a/xen/arch/x86/include/asm/debugreg.h
+++ b/xen/arch/x86/include/asm/debugreg.h
@@ -67,7 +67,7 @@
 #define DR_GENERAL_DETECT        (0x00002000UL) /* General detect enable */
 
 #define write_debugreg(reg, val) do {                       \
-    unsigned long __val = val;                              \
+    unsigned long __val = (val);                            \
     asm volatile ( "mov %0,%%db" #reg : : "r" (__val) );    \
 } while (0)
 #define read_debugreg(reg) ({                               \
-- 
2.34.1