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Date:   Fri, 25 Dec 2020 14:13:06 -0800
From:   Tom Rix <>
To:     Joe Perches <>,
        Simon Horman <>
Subject: Re: [PATCH] nfp: remove h from printk format specifier

On 12/25/20 9:06 AM, Joe Perches wrote:
> On Fri, 2020-12-25 at 06:56 -0800, Tom Rix wrote:
>> On 12/24/20 2:39 PM, Joe Perches wrote:
> []
>>> Kernel code doesn't use a signed char or short with %hx or %hu very often
>>> but in case you didn't already know, any signed char/short emitted with
>>> anything like %hx or %hu needs to be left alone as sign extension occurs so:
>> Yes, this would also effect checkpatch.
> Of course but checkpatch is stupid and doesn't know types
> so it just assumes that the type argument is not signed.
> In general, that's a reasonable but imperfect assumption.
> coccinelle could probably do this properly as it's a much
> better parser.  clang-tidy should be able to as well.

But types not matching the format string is a larger problem.

Has there been an effort to clean these up ?


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