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Date:   Sun, 13 Dec 2020 11:21:23 -0800
From:   Tom Rix <>
To:     Nick Desaulniers <>,
        Joe Perches <>
Cc:     Pablo Neira Ayuso <>,
        Jozsef Kadlecsik <>,
        Florian Westphal <>,
        "David S. Miller" <>,
        Jakub Kicinski <>,
        Nathan Chancellor <>,,,
        Network Development <>,
        LKML <>,
        clang-built-linux <>
Subject: Re: [PATCH] netfilter: conntrack: fix -Wformat

On 12/2/20 2:34 PM, Nick Desaulniers wrote:
> On Tue, Nov 10, 2020 at 2:04 PM Joe Perches <> wrote:
>> On Tue, 2020-11-10 at 14:00 -0800, Nick Desaulniers wrote:
>>> Yeah, we could go through and remove %h and %hh to solve this, too, right?
>> Yup.
>> I think one of the checkpatch improvement mentees is adding
>> some suggestion and I hope an automated fix mechanism for that.
> + Tom, who's been looking at leveraging clang-tidy to automate such
> treewide mechanical changes.
> ex.
> See also commit cbacb5ab0aa0 ("docs: printk-formats: Stop encouraging
> use of unnecessary %h[xudi] and %hh[xudi]") for a concise summary of
> related context.

I have posted the fixer here

It catches about 200 problems in 100 files, I'll be posting these soon.

clang-tidy-fix's big difference over checkpatch is using the __printf(x,y) attribute to find the log functions.

I will be doing a follow-on to add the missing __printf or __scanf's and rerunning the fixer.


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