linux-kernel - Re: [PATCH] Documentation: coding-style: don't encourage WARN*()

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Message-ID: <2024041510-tacky-childlike-fc6d@gregkh>
Date: Mon, 15 Apr 2024 07:22:28 +0200
From: Greg KH <gregkh@...uxfoundation.org>
To: Alex Elder <elder@...aro.org>
Cc: corbet@....net, workflows@...r.kernel.org, linux-doc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Documentation: coding-style: don't encourage WARN*()

On Sun, Apr 14, 2024 at 12:08:50PM -0500, Alex Elder wrote:
> Several times recently Greg KH has admonished that variants of WARN()
> should not be used, because when the panic_on_warn kernel option is set,
> their use can lead to a panic. His reasoning was that the majority of
> Linux instances (including Android and cloud systems) run with this option
> enabled. And therefore a condition leading to a warning will frequently
> cause an undesirable panic.
> 
> The "coding-style.rst" document says not to worry about this kernel
> option.  Update it to provide a more nuanced explanation.
> 
> Signed-off-by: Alex Elder <elder@...aro.org>

Thanks for writing this up:

Reviewed-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>