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Subject: Re: [PATCH] MAINTAINERS: XDP: restrict N: and K:
From:   Joe Perches <joe@perches.com>
To:     "Alexander A. Klimov" <grandmaster@al2klimov.de>,
        Toke =?ISO-8859-1?Q?H=F8iland-J=F8rgensen?= <toke@redhat.com>,
        Daniel Borkmann <daniel@iogearbox.net>, ast@kernel.org,
        davem@davemloft.net, kuba@kernel.org, hawk@kernel.org,
        john.fastabend@gmail.com, mchehab+huawei@kernel.org,
        robh@kernel.org, linux-kernel@vger.kernel.org,
        netdev@vger.kernel.org, bpf@vger.kernel.org
Date:   Fri, 10 Jul 2020 11:42:08 -0700
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On Fri, 2020-07-10 at 20:18 +0200, Alexander A. Klimov wrote:
> 
> Am 10.07.20 um 18:12 schrieb Toke H?iland-J?rgensen:
> > Joe Perches <joe@perches.com> writes:
> > 
> > > On Fri, 2020-07-10 at 17:14 +0200, Daniel Borkmann wrote:
> > > > On 7/10/20 8:17 AM, Alexander A. Klimov wrote:
> > > > > Am 09.07.20 um 22:37 schrieb Daniel Borkmann:
> > > > > > On 7/9/20 9:42 PM, Alexander A. Klimov wrote:
> > > > > > > Rationale:
> > > > > > > Documentation/arm/ixp4xx.rst contains "xdp" as part of "ixdp465"
> > > > > > > which has nothing to do with XDP.
> > > []
> > > > > > > diff --git a/MAINTAINERS b/MAINTAINERS
> > > []
> > > > > > > @@ -18708,8 +18708,8 @@ F:    include/trace/events/xdp.h
> > > > > > >    F:    kernel/bpf/cpumap.c
> > > > > > >    F:    kernel/bpf/devmap.c
> > > > > > >    F:    net/core/xdp.c
> > > > > > > -N:    xdp
> > > > > > > -K:    xdp
> > > > > > > +N:    (?:\b|_)xdp(?:\b|_)
> > > > > > > +K:    (?:\b|_)xdp(?:\b|_)
> > > > > > 
> > > > > > Please also include \W to generally match on non-alphanumeric char given you
> > > > > > explicitly want to avoid [a-z0-9] around the term xdp.
> > > > > Aren't \W, ^ and $ already covered by \b?
> > > > 
> > > > Ah, true; it says '\b really means (?:(?<=\w)(?!\w)|(?<!\w)(?=\w))', so all good.
> > > > In case this goes via net or net-next tree:
> > > 
> > > This N: pattern does not match files like:
> > > 
> > > 	samples/bpf/xdp1_kern.c
> > > 
> > > and does match files like:
> > > 
> > > 	drivers/net/ethernet/broadcom/bnxt/bnxt_xdp.c
> > > 
> > > Should it?
> > 
> > I think the idea is that it should match both?
> In *your* opinion: Which of these shall it (not) match?

Dunno, but it doesn't match these files.
The first 5 are good, the rest probably should.

$ git ls-files | grep xdp | grep -v -P '(?:\b|_)xdp(?:\b|_)'
Documentation/hwmon/xdpe12284.rst
arch/arm/mach-ixp4xx/ixdp425-pci.c
arch/arm/mach-ixp4xx/ixdp425-setup.c
arch/arm/mach-ixp4xx/ixdpg425-pci.c
drivers/hwmon/pmbus/xdpe12284.c
samples/bpf/xdp1_kern.c
samples/bpf/xdp1_user.c
samples/bpf/xdp2_kern.c
samples/bpf/xdp2skb_meta.sh
samples/bpf/xdp2skb_meta_kern.c
samples/bpf/xdpsock.h
samples/bpf/xdpsock_kern.c
samples/bpf/xdpsock_user.c
tools/testing/selftests/bpf/progs/xdping_kern.c
tools/testing/selftests/bpf/test_xdping.sh
tools/testing/selftests/bpf/xdping.c
tools/testing/selftests/bpf/xdping.h