linux-kernel - Re: [PATCH 1/1] scripts/checkpatch.pl: update kmalloc

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Date:	Sun, 29 Jun 2014 02:33:58 -0700
From:	Joe Perches <joe@...ches.com>
To:	Fabian Frederick <fabf@...net.be>
Cc:	linux-kernel@...r.kernel.org, Theodore Ts'o <tytso@....edu>,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH 1/1] scripts/checkpatch.pl: update kmalloc_array/kcalloc
 conversion warning

On Sun, 2014-06-29 at 11:21 +0200, Fabian Frederick wrote:
> On Fri, 27 Jun 2014 14:37:04 -0700 Joe Perches <joe@...ches.com> wrote:
[]
> > I'm not sure of the value of this as I think at some point
> > if not already today, the compiler will optimize the multiply
> > away.
> > 
> > But it's probably better to look at the non-sizeof variable
> > and emit the warning only when it's not $Constant or some
> > upper-case only macro #define like "\b[A-Z_]+\b" is used.
[]
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> > +			}
> > +			if ($r1 !~ /^sizeof\b/ && $r2 =~ /^sizeof\s*\S/ &&
> > +			    !($r1 =~ /^$Constant$/ || $r1 =~ /^[A-Z_]+$/)) {

This last test should be

/^[A-Z_][A-Z0-9_]*$/

to allow upper case macros with digits too

> Already tested ? If not I can do it and give you some feedback ...

Lightly.  Test away.


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