Merge branch 'net-sched-changes-around-qdisc_qstats_qlen_backlog'

Merge branch 'net-sched-changes-around-qdisc_qstats_qlen_backlog'

Eric Dumazet says:

====================
net/sched: changes around qdisc_qstats_qlen_backlog()

First patch makes clear qdisc_qstats_qlen_backlog() runs locklessly.

Second patch changes ioam6 to not acquire qdisc spinlock anymore.

Third pach adds missing READ_ONCE()/WRITE_ONCE() annotations in hfsc.

htb still needs fixes, I will take care of them separately.
====================

Link: https://patch.msgid.link/20260513080853.1383975-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>