net: tipc: Replace expression with offsetof()

Use the existing offsetof() macro instead of duplicating code.

Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/net/tipc/monitor.c b/net/tipc/monitor.c
index 6dce2ab..48fac3b 100644 (file)
--- a/net/tipc/monitor.c
+++ b/net/tipc/monitor.c
@@ -108,7 +108,7 @@ const int tipc_max_domain_size = sizeof(struct tipc_mon_domain);
  */
 static int dom_rec_len(struct tipc_mon_domain *dom, u16 mcnt)
 {
-       return ((void *)&dom->members - (void *)dom) + (mcnt * sizeof(u32));
+       return (offsetof(struct tipc_mon_domain, members)) + (mcnt * sizeof(u32));
 }
 
 /* dom_size() : calculate size of own domain based on number of peers