linux-kernel - Re: [PATCH -v3] checkpatch: Check for .byte-spelled insn opcodes documentation on x86

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Date:   Mon, 12 Oct 2020 08:04:47 -0700
From:   Joe Perches <joe@...ches.com>
To:     Borislav Petkov <bp@...en8.de>
Cc:     X86 ML <x86@...nel.org>, Andrew Morton <akpm@...ux-foundation.org>,
        Andy Whitcroft <apw@...onical.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH -v3] checkpatch: Check for .byte-spelled insn opcodes
 documentation on x86

On Mon, 2020-10-12 at 16:23 +0200, Borislav Petkov wrote:
> From: Borislav Petkov <bp@...e.de>
[]
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> @@ -408,6 +408,7 @@ our $Lval	= qr{$Ident(?:$Member)*};
>  our $Int_type	= qr{(?i)llu|ull|ll|lu|ul|l|u};
>  our $Binary	= qr{(?i)0b[01]+$Int_type?};
>  our $Hex	= qr{(?i)0x[0-9a-f]+$Int_type?};
> +our $Hex_byte	= qr{(?i)0x[0-9a-f]{1,2}};

$Hex_byte needs to be generic and this needs to
have a trailing \b otherwise it would match
0x12 from 0x1234 and leave 34