[PATCH] arm64: kexec: flush log to console in nmi_panic()

[Will Deacon]

On Thu, Jun 17, 2021 at 12:50:23PM +0000, Huang Shijie wrote:
> If kdump is configured, nmi_panic() may run to machine_kexec().
> 
> But in NMI context, the log is put in PER-CPU nmi_print_seq.
> So we can not see any log on the console since we entered the NMI context,
> such as the "Bye!" in previous line.
> 
> This patch fixes this issue by two steps:
> 	1) Uses printk_safe_flush_on_panic() to flush the log from
>              nmi_print_seq to global printk ring buffer,
>         2) Then uses console_flush_on_panic() to flush to console.
> 
> After this patch, we can see the "Bye!" log in the panic console.

Does it matter? I'd be more inclined to remove the print altogether...

Will