[FS#1136] HFSC kernel warnings with QoS / SQM

[LEDE Bugs]

The following task has a new comment added:

FS#1136 - HFSC kernel warnings with QoS / SQM
User who did this - Tony Ambardar (guidosarducci)

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For reference, the upstream issue was being tracked as:
[[https://bugzilla.kernel.org/show_bug.cgi?id=109581|Kernel.org Bugzilla – Bug 109581]],
and as of a few months ago was marked as resolved with the patch:
[[https://www.spinics.net/lists/netdev/msg450655.html|[PATCH RFC] net_sched/codel: do not defer queue length update]].

Would be great to have this backported to LEDE/OpenWRT for testing.
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More information can be found at the following URL:
https://bugs.openwrt.org/index.php?do=details&task_id=1136#comment4439