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Diffstat (limited to 'target/linux/generic/patches-3.14/663-remove_pfifo_fast.patch')
-rw-r--r--target/linux/generic/patches-3.14/663-remove_pfifo_fast.patch143
1 files changed, 143 insertions, 0 deletions
diff --git a/target/linux/generic/patches-3.14/663-remove_pfifo_fast.patch b/target/linux/generic/patches-3.14/663-remove_pfifo_fast.patch
new file mode 100644
index 0000000..3420d3d
--- /dev/null
+++ b/target/linux/generic/patches-3.14/663-remove_pfifo_fast.patch
@@ -0,0 +1,143 @@
+--- a/net/sched/sch_generic.c
++++ b/net/sched/sch_generic.c
+@@ -401,140 +401,6 @@ static struct Qdisc noqueue_qdisc = {
+ .busylock = __SPIN_LOCK_UNLOCKED(noqueue_qdisc.busylock),
+ };
+
+-
+-static const u8 prio2band[TC_PRIO_MAX + 1] = {
+- 1, 2, 2, 2, 1, 2, 0, 0 , 1, 1, 1, 1, 1, 1, 1, 1
+-};
+-
+-/* 3-band FIFO queue: old style, but should be a bit faster than
+- generic prio+fifo combination.
+- */
+-
+-#define PFIFO_FAST_BANDS 3
+-
+-/*
+- * Private data for a pfifo_fast scheduler containing:
+- * - queues for the three band
+- * - bitmap indicating which of the bands contain skbs
+- */
+-struct pfifo_fast_priv {
+- u32 bitmap;
+- struct sk_buff_head q[PFIFO_FAST_BANDS];
+-};
+-
+-/*
+- * Convert a bitmap to the first band number where an skb is queued, where:
+- * bitmap=0 means there are no skbs on any band.
+- * bitmap=1 means there is an skb on band 0.
+- * bitmap=7 means there are skbs on all 3 bands, etc.
+- */
+-static const int bitmap2band[] = {-1, 0, 1, 0, 2, 0, 1, 0};
+-
+-static inline struct sk_buff_head *band2list(struct pfifo_fast_priv *priv,
+- int band)
+-{
+- return priv->q + band;
+-}
+-
+-static int pfifo_fast_enqueue(struct sk_buff *skb, struct Qdisc *qdisc)
+-{
+- if (skb_queue_len(&qdisc->q) < qdisc_dev(qdisc)->tx_queue_len) {
+- int band = prio2band[skb->priority & TC_PRIO_MAX];
+- struct pfifo_fast_priv *priv = qdisc_priv(qdisc);
+- struct sk_buff_head *list = band2list(priv, band);
+-
+- priv->bitmap |= (1 << band);
+- qdisc->q.qlen++;
+- return __qdisc_enqueue_tail(skb, qdisc, list);
+- }
+-
+- return qdisc_drop(skb, qdisc);
+-}
+-
+-static struct sk_buff *pfifo_fast_dequeue(struct Qdisc *qdisc)
+-{
+- struct pfifo_fast_priv *priv = qdisc_priv(qdisc);
+- int band = bitmap2band[priv->bitmap];
+-
+- if (likely(band >= 0)) {
+- struct sk_buff_head *list = band2list(priv, band);
+- struct sk_buff *skb = __qdisc_dequeue_head(qdisc, list);
+-
+- qdisc->q.qlen--;
+- if (skb_queue_empty(list))
+- priv->bitmap &= ~(1 << band);
+-
+- return skb;
+- }
+-
+- return NULL;
+-}
+-
+-static struct sk_buff *pfifo_fast_peek(struct Qdisc *qdisc)
+-{
+- struct pfifo_fast_priv *priv = qdisc_priv(qdisc);
+- int band = bitmap2band[priv->bitmap];
+-
+- if (band >= 0) {
+- struct sk_buff_head *list = band2list(priv, band);
+-
+- return skb_peek(list);
+- }
+-
+- return NULL;
+-}
+-
+-static void pfifo_fast_reset(struct Qdisc *qdisc)
+-{
+- int prio;
+- struct pfifo_fast_priv *priv = qdisc_priv(qdisc);
+-
+- for (prio = 0; prio < PFIFO_FAST_BANDS; prio++)
+- __qdisc_reset_queue(qdisc, band2list(priv, prio));
+-
+- priv->bitmap = 0;
+- qdisc->qstats.backlog = 0;
+- qdisc->q.qlen = 0;
+-}
+-
+-static int pfifo_fast_dump(struct Qdisc *qdisc, struct sk_buff *skb)
+-{
+- struct tc_prio_qopt opt = { .bands = PFIFO_FAST_BANDS };
+-
+- memcpy(&opt.priomap, prio2band, TC_PRIO_MAX + 1);
+- if (nla_put(skb, TCA_OPTIONS, sizeof(opt), &opt))
+- goto nla_put_failure;
+- return skb->len;
+-
+-nla_put_failure:
+- return -1;
+-}
+-
+-static int pfifo_fast_init(struct Qdisc *qdisc, struct nlattr *opt)
+-{
+- int prio;
+- struct pfifo_fast_priv *priv = qdisc_priv(qdisc);
+-
+- for (prio = 0; prio < PFIFO_FAST_BANDS; prio++)
+- skb_queue_head_init(band2list(priv, prio));
+-
+- /* Can by-pass the queue discipline */
+- qdisc->flags |= TCQ_F_CAN_BYPASS;
+- return 0;
+-}
+-
+-struct Qdisc_ops pfifo_fast_ops __read_mostly = {
+- .id = "pfifo_fast",
+- .priv_size = sizeof(struct pfifo_fast_priv),
+- .enqueue = pfifo_fast_enqueue,
+- .dequeue = pfifo_fast_dequeue,
+- .peek = pfifo_fast_peek,
+- .init = pfifo_fast_init,
+- .reset = pfifo_fast_reset,
+- .dump = pfifo_fast_dump,
+- .owner = THIS_MODULE,
+-};
+-
+ static struct lock_class_key qdisc_tx_busylock;
+
+ struct Qdisc *qdisc_alloc(struct netdev_queue *dev_queue,