netdev - [Patch net-next v2] net_sched: use %px to print skb address in trace_qdisc

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Message-Id: <20210711183234.7889-2-xiyou.wangcong@gmail.com>
Date:   Sun, 11 Jul 2021 11:32:34 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     netdev@...r.kernel.org
Cc:     Qitao Xu <qitao.xu@...edance.com>,
        Cong Wang <cong.wang@...edance.com>,
        Jesper Dangaard Brouer <brouer@...hat.com>
Subject: [Patch net-next v2] net_sched: use %px to print skb address in trace_qdisc_dequeue()

From: Qitao Xu <qitao.xu@...edance.com>

Print format of skbaddr is changed to %px from %p, because we want
to use skb address as a quick way to identify a packet.

Note, trace ring buffer is only accessible to privileged users,
it is safe to use a real kernel address here.

Reviewed-by: Cong Wang <cong.wang@...edance.com>
Cc: Jesper Dangaard Brouer <brouer@...hat.com>
Signed-off-by: Qitao Xu <qitao.xu@...edance.com>
---
 include/trace/events/qdisc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/trace/events/qdisc.h b/include/trace/events/qdisc.h
index 330d32d84485..58209557cb3a 100644
--- a/include/trace/events/qdisc.h
+++ b/include/trace/events/qdisc.h
@@ -41,7 +41,7 @@ TRACE_EVENT(qdisc_dequeue,
 		__entry->txq_state	= txq->state;
 	),
 
-	TP_printk("dequeue ifindex=%d qdisc handle=0x%X parent=0x%X txq_state=0x%lX packets=%d skbaddr=%p",
+	TP_printk("dequeue ifindex=%d qdisc handle=0x%X parent=0x%X txq_state=0x%lX packets=%d skbaddr=%px",
 		  __entry->ifindex, __entry->handle, __entry->parent,
 		  __entry->txq_state, __entry->packets, __entry->skbaddr )
 );
-- 
2.27.0