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pkt_sched: sch_qfq: remove forward declaration of qfq_update_agg_ts 

This patch removes the forward declaration of qfq_update_agg_ts, by moving
the definition of the function above its first call. This patch also
removes a useless forward declaration of qfq_schedule_agg.

Reported-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Paolo Valente <paolo.valente@unimore.it>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Paolo Valente 2013-07-10 15:46:09 +02:00 committed by David S. Miller
parent 87f1369d6e
commit 88d4f419a4
1 changed files with 55 additions and 63 deletions
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118
net/sched/sch_qfq.c
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@ -1010,9 +1010,61 @@ static inline void charge_actual_service(struct qfq_aggregate *agg)
agg->F = agg->S + (u64)service_received * agg->inv_w;
}
static inline void qfq_update_agg_ts(struct qfq_sched *q,
struct qfq_aggregate *agg,
enum update_reason reason);
/* Assign a reasonable start time for a new aggregate in group i.
* Admissible values for \hat(F) are multiples of \sigma_i
* no greater than V+\sigma_i . Larger values mean that
* we had a wraparound so we consider the timestamp to be stale.
*
* If F is not stale and F >= V then we set S = F.
* Otherwise we should assign S = V, but this may violate
* the ordering in EB (see [2]). So, if we have groups in ER,
* set S to the F_j of the first group j which would be blocking us.
* We are guaranteed not to move S backward because
* otherwise our group i would still be blocked.
*/
static void qfq_update_start(struct qfq_sched *q, struct qfq_aggregate *agg)
{
unsigned long mask;
u64 limit, roundedF;
int slot_shift = agg->grp->slot_shift;
roundedF = qfq_round_down(agg->F, slot_shift);
limit = qfq_round_down(q->V, slot_shift) + (1ULL << slot_shift);
if (!qfq_gt(agg->F, q->V) || qfq_gt(roundedF, limit)) {
/* timestamp was stale */
mask = mask_from(q->bitmaps[ER], agg->grp->index);
if (mask) {
struct qfq_group *next = qfq_ffs(q, mask);
if (qfq_gt(roundedF, next->F)) {
if (qfq_gt(limit, next->F))
agg->S = next->F;
else /* preserve timestamp correctness */
agg->S = limit;
return;
}
}
agg->S = q->V;
} else /* timestamp is not stale */
agg->S = agg->F;
}
/* Update the timestamps of agg before scheduling/rescheduling it for
* service. In particular, assign to agg->F its maximum possible
* value, i.e., the virtual finish time with which the aggregate
* should be labeled if it used all its budget once in service.
*/
static inline void
qfq_update_agg_ts(struct qfq_sched *q,
struct qfq_aggregate *agg, enum update_reason reason)
{
if (reason != requeue)
qfq_update_start(q, agg);
else /* just charge agg for the service received */
agg->S = agg->F;
agg->F = agg->S + (u64)agg->budgetmax * agg->inv_w;
}
static void qfq_schedule_agg(struct qfq_sched *q, struct qfq_aggregate *agg);
@ -1135,66 +1187,6 @@ static struct qfq_aggregate *qfq_choose_next_agg(struct qfq_sched *q)
return agg;
}
/*
* Assign a reasonable start time for a new aggregate in group i.
* Admissible values for \hat(F) are multiples of \sigma_i
* no greater than V+\sigma_i . Larger values mean that
* we had a wraparound so we consider the timestamp to be stale.
*
* If F is not stale and F >= V then we set S = F.
* Otherwise we should assign S = V, but this may violate
* the ordering in EB (see [2]). So, if we have groups in ER,
* set S to the F_j of the first group j which would be blocking us.
* We are guaranteed not to move S backward because
* otherwise our group i would still be blocked.
*/
static void qfq_update_start(struct qfq_sched *q, struct qfq_aggregate *agg)
{
unsigned long mask;
u64 limit, roundedF;
int slot_shift = agg->grp->slot_shift;
roundedF = qfq_round_down(agg->F, slot_shift);
limit = qfq_round_down(q->V, slot_shift) + (1ULL << slot_shift);
if (!qfq_gt(agg->F, q->V) || qfq_gt(roundedF, limit)) {
/* timestamp was stale */
mask = mask_from(q->bitmaps[ER], agg->grp->index);
if (mask) {
struct qfq_group *next = qfq_ffs(q, mask);
if (qfq_gt(roundedF, next->F)) {
if (qfq_gt(limit, next->F))
agg->S = next->F;
else /* preserve timestamp correctness */
agg->S = limit;
return;
}
}
agg->S = q->V;
} else /* timestamp is not stale */
agg->S = agg->F;
}
/*
* Update the timestamps of agg before scheduling/rescheduling it for
* service. In particular, assign to agg->F its maximum possible
* value, i.e., the virtual finish time with which the aggregate
* should be labeled if it used all its budget once in service.
*/
static inline void
qfq_update_agg_ts(struct qfq_sched *q,
struct qfq_aggregate *agg, enum update_reason reason)
{
if (reason != requeue)
qfq_update_start(q, agg);
else /* just charge agg for the service received */
agg->S = agg->F;
agg->F = agg->S + (u64)agg->budgetmax * agg->inv_w;
}
static void qfq_schedule_agg(struct qfq_sched *, struct qfq_aggregate *);
static int qfq_enqueue(struct sk_buff *skb, struct Qdisc *sch)
{
struct qfq_sched *q = qdisc_priv(sch);