On Wed, Sep 05, 2018 at 03:45:53PM +0200, Niklas Cassel wrote: > However, I just managed to get this lockdep splat when booting without > earlycon and ftrace=irqsoff > I'm not sure that it is related, but I'm planning on looking into it anyway:
That looks like your generic printk is crap splat. I tend to use this patch-set: https://lkml.kernel.org/r/20170928121823.430053...@infradead.org and have (on x86): earlyprintk=serial,ttyS0,115200 force_early_printk debug ignore_loglevel That results in a printk that does pure UART bit-banging and works from any context without issue.
