linux-kernel - Re: [PATCH] perf tool: Carve out ctype.h et al

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Message-ID: <20140625211757.GD18773@kernel.org>
Date:	Wed, 25 Jun 2014 18:17:57 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Borislav Petkov <bp@...en8.de>
Cc:	Jiri Olsa <jolsa@...hat.com>, LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Robert Richter <rric@...nel.org>,
	David Ahern <dsahern@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	Jean Pihet <jean.pihet@...aro.org>
Subject: Re: [PATCH] perf tool: Carve out ctype.h et al

Em Wed, Jun 25, 2014 at 10:38:36PM +0200, Borislav Petkov escreveu:
> On Wed, Jun 25, 2014 at 09:25:47PM +0200, Jiri Olsa wrote:
> > heya,
> > got following error;
> > 
> > [jolsa@...va perf]$ make
> >   BUILD:   Doing 'make -j4' parallel build
> >   CC       util/pmu.o
> >   CC       util/parse-events-flex.o
> >   SUBDIR   /home/jolsa/kernel.org/linux-perf/tools/lib/traceevent/
> > util/pmu.c: In function ‘wordwrap’:
> > util/pmu.c:788:3: error: implicit declaration of function ‘isspace’ [-Werror=implicit-function-declaration]
> >    while (isspace(*s))
> >    ^
> > cc1: all warnings being treated as errors
> > make[1]: *** [util/pmu.o] Error 1
> > make[1]: *** Waiting for unfinished jobs....
> > make: *** [all] Error 2
> 
> This is a perfect example why doing this piecewise is the only way to
> go! And even that is not easy:

Yeah, and albeit it can take time, its how it would be done if this was
touching core kernel code, right? So lets try to do it that way ;-)
 
> I don't have this line in util/pmu.c:788 so I can't trigger it:
> 
>    782  bool pmu_have_event(const char *pname, const char *name)
>    783  {
>    784          struct perf_pmu *pmu;
>    785          struct perf_pmu_alias *alias;
>    786  
>    787          pmu = NULL;
>    788          while ((pmu = perf_pmu__scan(pmu)) != NULL) {
>    789                  if (strcmp(pname, pmu->name))
>    790                          continue;
>    791                  list_for_each_entry(alias, &pmu->aliases, list)
>    792                          if (!strcmp(alias->name, name))
>    793                                  return true;
>    794          }
>    795          return false;
>    796  }
> 
> So, I've done the patch ontop of those branches:
> 
> commit 279a8cc64fada4b0e7ebf4e4631d67c8ca715f27
> Merge: 9724066c49ba 1545d8aca9ac
> Author: Borislav Petkov <bp@...e.de>
> Date:   Tue Jun 24 15:45:51 2014 +0200
> 
>     Merge remote-tracking branch 'jolsa/perf/core' into ptool-v0.5
> 
> commit 9724066c49baab314a0c3d3f84ec102cd0f76b86
> Merge: ecdac96899e3 a93f0e551af9
> Author: Borislav Petkov <bp@...e.de>
> Date:   Tue Jun 24 15:45:44 2014 +0200
> 
>     Merge remote-tracking branch 'jolsa/perf/urgent' into ptool-v0.5
> 
> commit a93f0e551af9e194db38bfe16001e17a3a1d189a
> Author: Simon Que <sque@...omium.org>
> Date:   Mon Jun 16 11:32:09 2014 -0700
> 
>     perf symbols: Get kernel start address by symbol name
> 
> by checking out acme/perf/core first.
> 
> So, guys, can we agree on a common branch to apply patches ontop please?

I'd say work on tip/perf/core, if it doesn't apply on mine or jolsa's,
we'll fix it up, right Jiri?

We try not to keep too much stuff queued up, so there should be no
problems 99.9% of the time...

- Arnaldo
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