Re: [PATCH 1/3] checkpatch.pl: add missing memory barriers

From: Joe Perches
Date: Mon Jan 04 2016 - 11:15:30 EST


On Mon, 2016-01-04 at 16:11 +0000, Russell King - ARM Linux wrote:
> On Mon, Jan 04, 2016 at 08:07:40AM -0800, Joe Perches wrote:
> > On Mon, 2016-01-04 at 13:36 +0200, Michael S. Tsirkin wrote:
> > > + my $all_barriers = join('|', (@barriers, @smp_barriers));
> > > +
> > > + if ($line =~ /\b($all_barriers)\(/) {
> >
> > It would be better to use /\b$all_barriers\s*\(/
> > as there's no reason for the capture and there
> > could be a space between the function and the
> > open parenthesis.
>
> I think you mean
>
> /\b(?:$all_barriers)\s*\(/
>
> as 'all_barriers' will be:
>
> mb|wmb|rmb|smp_mb|smp_wmb|smp_rmb
>
> and putting that into your suggestion results in:
>
> /\bmb|wmb|rmb|smp_mb|smp_wmb|smp_rmb\s*\(/
>
> which is clearly wrong - the \b only applies to 'mb' and the \s*\( only
> applies to smp_rmb.

right, thanks.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/