linux-kernel - Re: [PATCH] userfaultfd: selftests: make _

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Date:   Thu, 3 Dec 2020 01:09:11 +0100
From:   Miguel Ojeda <miguel.ojeda.sandonis@...il.com>
To:     Axel Rasmussen <axelrasmussen@...gle.com>
Cc:     Peter Xu <peterx@...hat.com>, Shuah Khan <shuah@...nel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Joe Perches <joe@...ches.com>,
        Mike Rapoport <rppt@...ux.vnet.ibm.com>,
        Andrea Arcangeli <aarcange@...hat.com>,
        David Alan Gilbert <dgilbert@...hat.com>,
        Greg Thelen <gthelen@...gle.com>,
        "open list:KERNEL SELFTEST FRAMEWORK" 
        <linux-kselftest@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] userfaultfd: selftests: make __{s,u}64 format specifiers portable

On Thu, Dec 3, 2020 at 12:55 AM Axel Rasmussen <axelrasmussen@...gle.com> wrote:
>
> This is what clang-format yields. Are you thinking it would be better
> to line everything up with the ( in uffd_error( ?

Yeah, sometimes clang-format cannot do a good job with the 80 column
limit + 8 tabs.

You are definitely not forced to follow clang-format output by any
means. Subsystem maintainers decide what style they prefer anyway,
which could range from a manual approach to following clang-format
strictly. Clang-format implements the general kernel style as closely
as we could get it so far (it will improve more in the future when we
raise the minimum clang-format version required). See
Doc/process/clang-format.rst.

> Or, perhaps this case is a good reason to make uffd_error() a variadic
> macro so we can insert "-EEXIST" || "error" with a "%s".

...and indeed, sometimes it is a hint that simplifying things could help :-)

Cheers,
Miguel