linux-kernel - Re: [PATCH] perf tools: Fix variable name's inconsistency in hists__for

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Date:   Thu, 19 Dec 2019 22:45:27 +0100
From:   Jiri Olsa <jolsa@...hat.com>
To:     'Arnaldo Carvalho de Melo' <acme@...nel.org>
Cc:     "fujita.yuya@...itsu.com" <fujita.yuya@...itsu.com>,
        'Peter Zijlstra' <peterz@...radead.org>,
        'Ingo Molnar' <mingo@...hat.com>,
        'Jiri Olsa' <jolsa@...nel.org>,
        "'linux-kernel@...r.kernel.org'" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf tools: Fix variable name's inconsistency in
 hists__for_each macro

On Thu, Dec 19, 2019 at 01:54:24PM -0300, 'Arnaldo Carvalho de Melo' wrote:
> Em Thu, Dec 19, 2019 at 09:51:06AM +0100, Jiri Olsa escreveu:
> > On Thu, Dec 19, 2019 at 08:08:32AM +0000, fujita.yuya@...itsu.com wrote:
> > > From: Yuya Fujita <fujita.yuya@...itsu.com>
> > > 
> > > Variable names are inconsistent in hists__for_each macro.
> > > Due to this inconsistency, the macro replaces its second argument with "fmt" 
> > > regardless of its original name.
> > > So far it works because only "fmt" is passed to the second argument.
> > 
> > hum, I think it works because all the instances that use these macros
> > have 'fmt' variable passed in
> 
> Exactly, that is what he said :-)

ugh, I read too fast, sry

jirka

> 
> Nice catch!
>  
> > > However, this behavior is not expected and should be fixed.
> > > 
> > > Fixes: f0786af536bb ("perf hists: Introduce hists__for_each_format macro")
> > > Fixes: aa6f50af822a ("perf hists: Introduce hists__for_each_sort_list macro")
> > 
> > nice ;-)
> > 
> > Acked-by: Jiri Olsa <jolsa@...nel.org>
> 
> Applied.
>  
> > thanks,
> > jirka
> > 
> > > Signed-off-by: Yuya Fujita <fujita.yuya@...itsu.com>
> > > ---
> > >  tools/perf/util/hist.h |    4 ++--
> > >  1 files changed, 2 insertions(+), 2 deletions(-)
> > > 
> > > diff --git a/tools/perf/util/hist.h b/tools/perf/util/hist.h
> > > index 4528690..0aa63ae 100644
> > > --- a/tools/perf/util/hist.h
> > > +++ b/tools/perf/util/hist.h
> > > @@ -339,10 +339,10 @@ static inline void perf_hpp__prepend_sort_field(struct perf_hpp_fmt *format)
> > >  	list_for_each_entry_safe(format, tmp, &(_list)->sorts, sort_list)
> > >  
> > >  #define hists__for_each_format(hists, format) \
> > > -	perf_hpp_list__for_each_format((hists)->hpp_list, fmt)
> > > +	perf_hpp_list__for_each_format((hists)->hpp_list, format)
> > >  
> > >  #define hists__for_each_sort_list(hists, format) \
> > > -	perf_hpp_list__for_each_sort_list((hists)->hpp_list, fmt)
> > > +	perf_hpp_list__for_each_sort_list((hists)->hpp_list, format)
> > >  
> > >  extern struct perf_hpp_fmt perf_hpp__format[];
> > >  
> > > -- 
> > > 1.7.1
> > > 
> 
> -- 
> 
> - Arnaldo
>