sch_api: Change signature of qdisc_tree_reduce_backlog() to use ints

There are now several places where qdisc_tree_reduce_backlog() is called
with a negative number of packets (to signal an increase in number of
packets in the queue). Rather than rely on overflow behaviour, change the
function signature to use signed integers to communicate this usage to
people reading the code.

Signed-off-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 1 insertions, 2 deletions

diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c
index 7e4d1ccf4c87..03e26e8d0ec9 100644
--- a/net/sched/sch_api.c
+++ b/net/sched/sch_api.c
@@ -758,8 +758,7 @@ static u32 qdisc_alloc_handle(struct net_device *dev)
 	return 0;
 }
 
-void qdisc_tree_reduce_backlog(struct Qdisc *sch, unsigned int n,
-			       unsigned int len)
+void qdisc_tree_reduce_backlog(struct Qdisc *sch, int n, int len)
 {
 	bool qdisc_is_offloaded = sch->flags & TCQ_F_OFFLOADED;
 	const struct Qdisc_class_ops *cops;