[XEN PATCH v3 6/7] xen/mm: address violations 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/include/xen/mm.h | 14 +++++++-------
 1 file changed, 7 insertions(+), 7 deletions(-)

diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h
index 3e84960a365f..7561297a7553 100644
--- a/xen/include/xen/mm.h
+++ b/xen/include/xen/mm.h
@@ -415,15 +415,15 @@ page_list_splice(struct page_list_head *list, struct 
page_list_head *head)
 }
 
 #define page_list_for_each(pos, head) \
-    for ( pos = (head)->next; pos; pos = page_list_next(pos, head) )
+    for ( (pos) = (head)->next; (pos); (pos) = page_list_next(pos, head) )
 #define page_list_for_each_safe(pos, tmp, head) \
-    for ( pos = (head)->next; \
-          pos ? (tmp = page_list_next(pos, head), 1) : 0; \
-          pos = tmp )
+    for ( (pos) = (head)->next; \
+          (pos) ? ((tmp) = page_list_next(pos, head), 1) : 0; \
+          (pos) = (tmp) )
 #define page_list_for_each_safe_reverse(pos, tmp, head) \
-    for ( pos = (head)->tail; \
-          pos ? (tmp = page_list_prev(pos, head), 1) : 0; \
-          pos = tmp )
+    for ( (pos) = (head)->tail; \
+          (pos) ? ((tmp) = page_list_prev(pos, head), 1) : 0; \
+          (pos) = (tmp) )
 #else
 # define page_list_head                  list_head
 # define PAGE_LIST_HEAD_INIT             LIST_HEAD_INIT
-- 
2.34.1