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[XEN,03/10] xen/xsm: add parentheses to comply with MISRA C Rule 20.7

Message ID 4eeb9be581e3fa07378f5a7deb23c9066474638b.1710762555.git.nicola.vetrini@bugseng.com (mailing list archive)
State Superseded
Headers show
Series address some violations of MISRA C Rule 20.7 | expand

Commit Message

Nicola Vetrini March 18, 2024, 11:53 a.m. UTC
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>
---
 xen/include/xsm/dummy.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Stefano Stabellini March 19, 2024, 3:32 a.m. UTC | #1
On Mon, 18 Mar 2024, Nicola Vetrini wrote:
> 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>
 
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
diff mbox series

Patch

diff --git a/xen/include/xsm/dummy.h b/xen/include/xsm/dummy.h
index 8671af1ba4d3..88039fdd227c 100644
--- a/xen/include/xsm/dummy.h
+++ b/xen/include/xsm/dummy.h
@@ -58,7 +58,7 @@  void __xsm_action_mismatch_detected(void);
 
 #define XSM_DEFAULT_ARG /* */
 #define XSM_DEFAULT_VOID void
-#define XSM_ASSERT_ACTION(def) xsm_default_t action = def; (void)action
+#define XSM_ASSERT_ACTION(def) xsm_default_t action = (def); (void)action
 
 #else /* CONFIG_XSM */
 
@@ -71,7 +71,7 @@  void __xsm_action_mismatch_detected(void);
 #define XSM_INLINE always_inline
 #define XSM_DEFAULT_ARG xsm_default_t action,
 #define XSM_DEFAULT_VOID xsm_default_t action
-#define XSM_ASSERT_ACTION(def) LINKER_BUG_ON(def != action)
+#define XSM_ASSERT_ACTION(def) LINKER_BUG_ON((def) != action)
 
 #endif /* CONFIG_XSM */