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Re: [Xen-devel] [PATCH v3 3/3] checkpatch: add virt barriers



On Mon, 2016-01-11 at 09:13 +1100, Julian Calaby wrote:
> On Mon, Jan 11, 2016 at 6:31 AM, Michael S. Tsirkin <mst@xxxxxxxxxx> wrote:
> > Add virt_ barriers to list of barriers to check for
> > presence of a comment.
[]
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
[]
> > @@ -5133,7 +5133,8 @@ sub process {
> >                 }x;
> >                 my $all_barriers = qr{
> >                         $barriers|
> > -                       smp_(?:$smp_barrier_stems)
> > +                       smp_(?:$smp_barrier_stems)|
> > +                       virt_(?:$smp_barrier_stems)
> 
> Sorry I'm late to the party here, but would it make sense to write this as:
> 
> (?:smp|virt)_(?:$smp_barrier_stems)

Yes.  Perhaps the name might be better as barrier_stems.

Also, ideally this would be longest match first or use \b
after the matches so that $all_barriers could work
successfully without a following \s*\(

my $all_barriers = qr{
        (?:smp|virt)_(?:barrier_stems)|
        $barriers)
}x;

or maybe add separate $smp_barriers and $virt_barriers

<shrug>  it doesn't matter much in any case

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