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1.测试发现问题版本是3月4日转测版本5.10.0-4.6.0.18,短时间内(几小时)即可必现；
2.使用3月14日新转测版本5.10.0-4.12.0.24，当前(2021.0319 16:51)已跑4天*24小时以上，未再复现；
合入补丁解决：
73a22f5aae4a mm: keep the original function for non-RPi
e0690c4ace1f video&logo: keep the original function for non-RPi
459ac03f23fa serial: keep the original function for non-RPi
sysrq: avoid concurrently info printing by 'sysrq-trigger'
fbdev: keep the original function for non-RPi