[XEN PATCH 04/10] xen/device_tree: address violations of MISRA C Rule 20.7

[Nicola Vetrini <nicola.vetrini@bugseng.com>]

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>
---
This patch uniforms the way these macros use parentheses, skipping the
already deviated cases of the lhs of an assignment. In principle, all
three could have the parentheses on the macro argument in the lhs added.
---
 xen/include/xen/device_tree.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/include/xen/device_tree.h b/xen/include/xen/device_tree.h
index 6fe2fa8b2123..e6287305a7b5 100644
--- a/xen/include/xen/device_tree.h
+++ b/xen/include/xen/device_tree.h
@@ -250,7 +250,7 @@ dt_find_interrupt_controller(const struct dt_device_match *matches);
     for ( pp = (dn)->properties; (pp) != NULL; pp = (pp)->next )
 
 #define dt_for_each_device_node(dt, dn)                     \
-    for ( dn = dt; (dn) != NULL; dn = (dn)->allnext )
+    for ( dn = (dt); (dn) != NULL; dn = (dn)->allnext )
 
 #define dt_for_each_child_node(dt, dn)                      \
     for ( dn = (dt)->child; (dn) != NULL; dn = (dn)->sibling )
-- 
2.34.1