linux-kernel - Re: [PATCH v2 19/24] xtensa/cpu: Make sure cpu

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Date:   Tue, 14 Feb 2023 14:29:44 -0500
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Josh Poimboeuf <jpoimboe@...nel.org>
Cc:     Philippe Mathieu-Daudé <philmd@...aro.org>,
        linux-kernel@...r.kernel.org, jgross@...e.com,
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Subject: Re: [PATCH v2 19/24] xtensa/cpu: Make sure cpu_die() doesn't return

On Tue, 14 Feb 2023 10:23:22 -0800
Josh Poimboeuf <jpoimboe@...nel.org> wrote:


> void __ref cpu_die(void)
> {
> 	idle_task_exit();
> 	local_irq_disable();
> 	__asm__ __volatile__(
> 			"	movi	a2, cpu_restart\n"
> 			"	jx	a2\n");
> 
> 	BUG();
> }
> 
> Hm, not only is the comment wrong, but it seems to be branching to
> cpu_restart?  That doesn't seem right at all.

Agreed, that does not look right at all.

-- Steve

> 
> Max/Chris?
>