spi: bugfix spi_add_device() with duplicate chipselects

[linux-2.6] / include / net / sch_generic.h

diff --git a/include/net/sch_generic.h b/include/net/sch_generic.h
index db9ad655eb8aa089c1c0936f5307c1453a7c90bd..a7abfda3e447896a0be5b06ed1809aa6e0b185fb 100644 (file)
--- a/include/net/sch_generic.h
+++ b/include/net/sch_generic.h
@@ -193,10 +193,22 @@ static inline struct Qdisc *qdisc_root(struct Qdisc *qdisc)
        return qdisc->dev_queue->qdisc;
 }
 
+/* The qdisc root lock is a mechanism by which to top level
+ * of a qdisc tree can be locked from any qdisc node in the
+ * forest.  This allows changing the configuration of some
+ * aspect of the qdisc tree while blocking out asynchronous
+ * qdisc access in the packet processing paths.
+ *
+ * It is only legal to do this when the root will not change
+ * on us.  Otherwise we'll potentially lock the wrong qdisc
+ * root.  This is enforced by holding the RTNL semaphore, which
+ * all users of this lock accessor must do.
+ */
 static inline spinlock_t *qdisc_root_lock(struct Qdisc *qdisc)
 {
        struct Qdisc *root = qdisc_root(qdisc);
 
+       ASSERT_RTNL();
        return qdisc_lock(root);
 }
 
@@ -331,17 +343,31 @@ static inline unsigned int qdisc_pkt_len(struct sk_buff *skb)
        return qdisc_skb_cb(skb)->pkt_len;
 }
 
+/* additional qdisc xmit flags (NET_XMIT_MASK in linux/netdevice.h) */
+enum net_xmit_qdisc_t {
+       __NET_XMIT_STOLEN = 0x00010000,
+       __NET_XMIT_BYPASS = 0x00020000,
+};
+
+#ifdef CONFIG_NET_CLS_ACT
+#define net_xmit_drop_count(e) ((e) & __NET_XMIT_STOLEN ? 0 : 1)
+#else
+#define net_xmit_drop_count(e) (1)
+#endif
+
 static inline int qdisc_enqueue(struct sk_buff *skb, struct Qdisc *sch)
 {
+#ifdef CONFIG_NET_SCHED
        if (sch->stab)
                qdisc_calculate_pkt_len(skb, sch->stab);
+#endif
        return sch->enqueue(skb, sch);
 }
 
 static inline int qdisc_enqueue_root(struct sk_buff *skb, struct Qdisc *sch)
 {
        qdisc_skb_cb(skb)->pkt_len = skb->len;
-       return qdisc_enqueue(skb, sch);
+       return qdisc_enqueue(skb, sch) & NET_XMIT_MASK;
 }
 
 static inline int __qdisc_enqueue_tail(struct sk_buff *skb, struct Qdisc *sch,