linux-kernel - Re: [PATCH v1] panic: add panic_redirect

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Message-Id: <20260118124434.1373ffe0f314019381257a7f@linux-foundation.org>
Date: Sun, 18 Jan 2026 12:44:34 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Pnina Feder <pnina.feder@...ileye.com>
Cc: pmladek@...e.com, bhe@...hat.com, linux-kernel@...r.kernel.org,
 lkp@...el.com, mgorman@...e.de, mingo@...hat.com, peterz@...radead.org,
 rostedt@...dmis.org, senozhatsky@...omium.org, tglx@...utronix.de,
 vkondra@...ileye.com
Subject: Re: [PATCH v1] panic: add panic_redirect_cpu declaration to header

On Sun, 18 Jan 2026 14:01:49 +0200 Pnina Feder <pnina.feder@...ileye.com> wrote:

> Add the extern declaration for panic_redirect_cpu to linux/panic.h
> to fix the sparse warning:
> 
>   kernel/panic.c:305:10: sparse: sparse: symbol 'panic_redirect_cpu'
>   was not declared. Should it be static?
> 
> The variable needs to be declared in the header alongside panic_cpu
> since it is used for synchronization when redirecting panic to a
> specific CPU via the panic_force_cpu= boot parameter.
> 

Thanks, I added this as a squashable fix against your earlier patch
"panic: add panic_force_cpu= parameter to redirect panic to a specific
CPU".

(It's nice to tell people when a patch fixes a pending patch in this
manner - otherwise everyone has to run around trying to figure out
which tree is being patched and why).