linux-kernel - Re: [PATCH 17/30] tracing: Improve panic/die notifiers

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Date:   Tue, 17 May 2022 12:33:52 -0300
From:   "Guilherme G. Piccoli" <gpiccoli@...lia.com>
To:     Petr Mladek <pmladek@...e.com>, rostedt@...dmis.org
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Subject: Re: [PATCH 17/30] tracing: Improve panic/die notifiers

On 11/05/2022 08:45, Petr Mladek wrote:
> [...]
> DIE_OOPS and PANIC_NOTIFIER are from different enum.
> It feels like comparing apples with oranges here.
> 
> IMHO, the proper way to unify the two notifiers is
> a check of the @self parameter. Something like:
> 
> static int trace_die_panic_handler(struct notifier_block *self,
> 				unsigned long ev, void *unused)
> {
> 	if (self == trace_die_notifier && val != DIE_OOPS)
> 		goto out;
> 
> 	ftrace_dump(ftrace_dump_on_oops);
> out:
> 	return NOTIFY_DONE;
> }
> 
> Best Regards,
> Petr

OK Petr, thanks - will implement your suggestion in V2 (CC Steven)

Cheers!