[FS#804] mt7621: kernel errors - rcu_sched detected stalls on CPUs/tasks

[LEDE Bugs]

The following task has a new comment added:

FS#804 - mt7621: kernel errors - rcu_sched detected stalls on CPUs/tasks
User who did this - dchard (dchard)

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Kernel 4.9.37 is also affected. I am testing John's patched build, and so far I was not able to reproduce this bug with hours of torturing the CPU. 
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More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=804#comment2988