bridge: Turn flag change macro into a function.

Turn the flag change macro into a function to allow
easier updates and to reduce space.

Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/bridge/br_sysfs_if.c

@@ -41,20 +41,27 @@ static ssize_t show_##_name(struct net_bridge_port *p, char *buf) \
 }								\
 static int store_##_name(struct net_bridge_port *p, unsigned long v) \
 {								\
-	unsigned long flags = p->flags;				\
-	if (v)							\
-		flags |= _mask;					\
-	else							\
-		flags &= ~_mask;				\
-	if (flags != p->flags) {				\
-		p->flags = flags;				\
-		br_ifinfo_notify(RTM_NEWLINK, p);		\
-	}							\
-	return 0;						\
+	return store_flag(p, v, _mask);				\
 }								\
 static BRPORT_ATTR(_name, S_IRUGO | S_IWUSR,			\
 		   show_##_name, store_##_name)
 
+static int store_flag(struct net_bridge_port *p, unsigned long v,
+		      unsigned long mask)
+{
+	unsigned long flags = p->flags;
+
+	if (v)
+		flags |= mask;
+	else
+		flags &= ~mask;
+
+	if (flags != p->flags) {
+		p->flags = flags;
+		br_ifinfo_notify(RTM_NEWLINK, p);
+	}
+	return 0;
+}
 
 static ssize_t show_path_cost(struct net_bridge_port *p, char *buf)
 {