Mailing List Archive

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/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