Re: [PATCH perf/core] perf tools: Add missing break for PERF_RECORD_ITRACE_START

From: Arnaldo Carvalho de Melo
Date: Mon Jun 29 2015 - 09:06:20 EST


Em Mon, Jun 29, 2015 at 01:47:14PM +0200, Peter Zijlstra escreveu:
> On Mon, Jun 29, 2015 at 02:17:18PM +0300, Adrian Hunter wrote:
> > On 29/06/15 14:12, Jiri Olsa wrote:
> > > +++ b/tools/perf/util/machine.c
> > > @@ -1448,7 +1448,7 @@ int machine__process_event(struct machine *machine, union perf_event *event,
> > > case PERF_RECORD_AUX:
> > > ret = machine__process_aux_event(machine, event); break;
> > > case PERF_RECORD_ITRACE_START:
> > > - ret = machine__process_itrace_start_event(machine, event);
> > > + ret = machine__process_itrace_start_event(machine, event); break;
> > > case PERF_RECORD_LOST_SAMPLES:
> > > ret = machine__process_lost_samples_event(machine, event, sample); break;
> > > break;

> > But now you have break; break;

> > Isn't putting 'break' on the end of the line making things harder to read?

> I would tend to agree, its a very odd style.

Humm, there are two cases in tools/perf/, where it was made (hey, I am
to blame) for really simple stuff like:

case A: B(); break;

To make it more compact.

But I just checked and this is not that uncommon:

[acme@zoo linux]$ find . -name "*.[ch]" | xargs grep ';.*break' | wc -l
5035
[acme@zoo linux]$ find arch -name "*.[ch]" | xargs grep ';.*break' | wc -l
1440
[acme@zoo linux]$ find block -name "*.[ch]" | xargs grep ';.*break' | wc -l
7
[acme@zoo linux]$ find crypto -name "*.[ch]" | xargs grep ';.*break' | wc -l
0
[acme@zoo linux]$ find fs -name "*.[ch]" | xargs grep ';.*break' | wc -l
66
[acme@zoo linux]$ find kernel -name "*.[ch]" | xargs grep ';.*break' | wc -l
11
[acme@zoo linux]$ find mm -name "*.[ch]" | xargs grep ';.*break' | wc -l
3
[acme@zoo linux]$

But I am not that attached to it, as said, just two cases :)

- Arnaldo
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