linux-kernel - Re: [PATCH] perf build: Remove stray '\' before that is warned about since grep 3.8

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Message-ID: <CAM9d7cgW7PmgSj3kAowFOVLG56L=QHVCU=PfM+p7sVfQyJrt6Q@mail.gmail.com>
Date:   Fri, 20 Oct 2023 14:15:03 -0700
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Ian Rogers <irogers@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf build: Remove stray '\' before that is warned about
 since grep 3.8

On Fri, Oct 20, 2023 at 1:34 PM Arnaldo Carvalho de Melo
<acme@...nel.org> wrote:
>
> Em Tue, Oct 17, 2023 at 12:02:20PM -0700, Namhyung Kim escreveu:
> > Hi Arnaldo,
> >
> > On Tue, Oct 17, 2023 at 11:15 AM Arnaldo Carvalho de Melo
> > <acme@...nel.org> wrote:
> > >
> > > To address this grep 3.8 warning:
> > >
> > >   grep: warning: stray \ before #
> > >
> > > Cc: Adrian Hunter <adrian.hunter@...el.com>
> > > Cc: Ian Rogers <irogers@...gle.com>
> > > Cc: Jiri Olsa <jolsa@...nel.org>
> > > Cc: Namhyung Kim <namhyung@...nel.org>
> > > Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
> > > ---
> > >  tools/perf/Makefile.perf | 2 +-
> > >  1 file changed, 1 insertion(+), 1 deletion(-)
> > >
> > > diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
> > > index 456872ac410df4c0..25d5ccaec22a44fe 100644
> > > --- a/tools/perf/Makefile.perf
> > > +++ b/tools/perf/Makefile.perf
> > > @@ -361,7 +361,7 @@ python-clean := $(call QUIET_CLEAN, python) $(RM) -r $(PYTHON_EXTBUILD) $(OUTPUT
> > >  ifeq ($(CONFIG_LIBTRACEEVENT),y)
> > >    PYTHON_EXT_SRCS := $(shell grep -v ^\# util/python-ext-sources)
> >
> > Do we need to change it here too?  Otherwise looks good
>
> I think I did tests and simply removing the \ in this case will comment
> out the rest of the line after the #, IIRC we would have to enclose it
> in '', like
>
>   PYTHON_EXT_SRCS := $(shell grep -v '^\#' util/python-ext-sources)
>
> But then if it works as-is, why pollute the patch? :-)
>
> In general the less lines you touch in a patch, the better, don't fix
> what isn't broken, helps reviewing, etc. :-)

Agreed, thanks!
Namhyung