Add initfs hook which causes a kernel panic (useful for debugging)

This hook is useful (at least for me) to debug the mainline kernel when there's no serial output from the device.

The hook simply causes a kernel panic after 30 seconds, and these are the reasons:

1. If the device remains powered on for 30s before rebooting I know that he reached the initramfs script otherwise it failed earlier
2. Installing a working kernel with CONFIG_RAMOOPS=y and the debug-shell hook in the boot partition, after the kernel panic it will reboot and you can telnet in and read /proc/last_kmsg

added 2 commits

• bbc4b6bb - 1 commit from branch master
• 5a8ae263 - Add initfs hook which causes a kernel panic (useful for debugging)

Compare with previous version

By Daniele Debernardi on 2018-09-21T21:24:59

assigned to @ollieparanoid

By Daniele Debernardi on 2018-09-26T23:34:54

approved this merge request

By Oliver Smith on 2018-10-02T04:28:19

Code looks good to me.

That's a great idea for debugging, thanks for the MR @drebrez!

By Oliver Smith on 2018-10-02T04:29:35

added 23 commits

• 5a8ae263...26bde0a5 - 22 commits from branch master
• 75124bb5 - Add initfs hook which causes a kernel panic (useful for debugging)

Compare with previous version

By Oliver Smith on 2018-10-02T04:29:49

enabled an automatic merge when the pipeline for 75124bb5 succeeds

By Oliver Smith on 2018-10-02T04:31:12

merged

By Oliver Smith on 2018-10-02T04:31:26