linux-kernel - Re: [PATCH v2 0/4] kexec: add kexec flag to control debug printing

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Message-Id: <20260119154947.e351bfb8e97d91305932e2eb@linux-foundation.org>
Date: Mon, 19 Jan 2026 15:49:47 -0800
From: Andrew Morton <akpm@...ux-foundation.org>
To: Qiang Ma <maqianga@...ontech.com>
Cc: bhe@...hat.com, catalin.marinas@....com, will@...nel.org,
 kexec@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/4] kexec: add kexec flag to control debug printing

On Fri, 19 Dec 2025 17:31:30 +0800 Qiang Ma <maqianga@...ontech.com> wrote:

> The commit cbc2fe9d9cb2 ("kexec_file: add kexec_file flag to control
> debug printing") added the kexec_file flag to control debug printing.
> However, for arm64, after commit 6f8c1da071a4 ("kexec_file, arm64: print
> out debugging message if required"), when using the kexec_load interface,
> the kexec_image_info function is called to print debug message, but
> it uses kexec_dprintk, which is only available under kexec_file,
> then when specifying 'kexec -d', kexec_load interface will print nothing.
> 
> For riscv, commit eb7622d908a09 ("kexec_file, riscv: print out debugging
> message if required") remove kexec_image_info(), because the content has
> been printed out in generic code in kexec_file_load, but not in kexec_load.
> 
> Therefore, in order to solve the two problems mentioned above, for this
> patchset, several things need to be done:
> 
> 1. Enabling kexec_dprintk is available for kexec_load.
> 2. Add some debugging message of the deleted kexec_image_info
>    to generic code.
> 3. Remove duplicate debugging prints for arm64.

Some additional review input on this series would be good, if someone
has the time.