linux-kernel - Re: [PATCH] drivers/video/fbdev/core/fbmem.c: add pointer judgment

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Message-ID: <YKUBtiOTE7zJHAjI@casper.infradead.org>
Date:   Wed, 19 May 2021 13:16:54 +0100
From:   Matthew Wilcox <willy@...radead.org>
To:     songqiang <songqiang@...ontech.com>
Cc:     sam@...nborg.org, b.zolnierkie@...sung.com,
        penguin-kernel@...ove.sakura.ne.jp, george.kennedy@...cle.com,
        arnd@...db.de, tzimmermann@...e.de, jgg@...pe.ca,
        dri-devel@...ts.freedesktop.org, linux-fbdev@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drivers/video/fbdev/core/fbmem.c: add pointer judgment

On Wed, May 19, 2021 at 08:00:28PM +0800, songqiang wrote:
> Signed-off-by: songqiang <songqiang@...ontech.com>
> ---

You need to explain:

 - Why you think this patch is needed
   - Did you observe a problem at runtime?
   - Is this the output from some checking tool?
 - Why this is the right way to address the problem