[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 - Zhong Jianxin (azuwis)

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It's possible to force building the same kernel version as [[https://downloads.lede-project.org/snapshots/targets/ramips/mt7621/packages/kernel_4.9.37-1-7f0de30d5b73958cb146494d8e5b2ef4_mipsel_24kc.ipk
|upstream snapshot]], e.g:

    $ make clean    
    $ make LINUX_VERMAGIC=7f0de30d5b73958cb146494d8e5b2ef4

As long as you use the some code revision and some kernel config, kmod from upstream snapshot should work fine.
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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#comment3082