[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 - Pierre Parent (pparent76)

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I've update the image: go back to normal kernel-magic and add few kernel modules.

It may be more stable but it does not solve completly rcu_sched problems.

Also I'm pretty sure that with openwrt 15.05.1 and kernel 3.18.23 there is no such rcu problem at all.
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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#comment3095