linux-kernel - Re: [PATCH v13 11/13] platform/x86: Intel SGX driver

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Date:   Thu, 06 Sep 2018 17:50:01 -0700
From:   Joe Perches <joe@...ches.com>
To:     Miguel Ojeda <miguel.ojeda.sandonis@...il.com>,
        Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
Cc:     Andy Shevchenko <andy.shevchenko@...il.com>,
        "maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)" <x86@...nel.org>,
        Platform Driver <platform-driver-x86@...r.kernel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        sean.j.christopherson@...el.com, nhorman@...hat.com,
        npmccallum@...hat.com, linux-sgx@...r.kernel.org,
        serge.ayoun@...el.com, shay.katz-zamir@...el.com,
        "Siddha, Suresh B" <suresh.b.siddha@...el.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H. Peter Anvin" <hpa@...or.com>,
        Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Eric Biggers <ebiggers@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v13 11/13] platform/x86: Intel SGX driver

On Thu, 2018-09-06 at 19:35 +0200, Miguel Ojeda wrote:
> > Which one is right and why the kernel tree is polluted with C99-headers
> > when they do not pass checkpatch.pl?

checkpatch ignores c99 headers since 2016.

$ git log --stat -p -1 dadf680de3c2eb4cba9840619991eda0cfe98778
commit dadf680de3c2eb4cba9840619991eda0cfe98778
Author: Joe Perches <joe@...ches.com>
Date:   Tue Aug 2 14:04:33 2016 -0700

    checkpatch: allow c99 style // comments
    
    Sanitise the lines that contain c99 comments so that the error doesn't
    get emitted.
    
    Link: http://lkml.kernel.org/r/d4d22c34ad7bcc1bceb52f0742f76b7a6d585235.1468368420.git.joe@perches.com
    Signed-off-by: Joe Perches <joe@...ches.com>
    Signed-off-by: Andrew Morton <akpm@...ux-foundation.org>
    Signed-off-by: Linus Torvalds <torvalds@...ux-foundation.org>
---
 scripts/checkpatch.pl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index a4476b61e93f..79273003d5e7 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -55,6 +55,7 @@ my $spelling_file = "$D/spelling.txt";
 my $codespell = 0;
 my $codespellfile = "/usr/share/codespell/dictionary.txt";
 my $color = 1;
+my $allow_c99_comments = 1;
 
 sub help {
        my ($exitcode) = @_;
@@ -1144,6 +1145,11 @@ sub sanitise_line {
                $res =~ s@(\#\s*(?:error|warning)\s+).*@...clean@;
        }
 
+       if ($allow_c99_comments && $res =~ m@(//.*$)@) {
+               my $match = $1;
+               $res =~ s/\Q$match\E/"$;" x length($match)/e;
+       }
+
        return $res;
 }