linux-kernel - Re: [PATCH] perf: Support for Openembedded/Yocto -dbg packages

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Message-ID: <CAPybu_0CECKhPqpCpQoVvkUoWH-U6NqWfbVc3HjSvP_j6L_V3A@mail.gmail.com>
Date:	Wed, 18 Sep 2013 15:58:08 +0200
From:	Ricardo Ribalda Delgado <ricardo.ribalda@...il.com>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>,
	Peter Zijlstra <peterz@...radead.org>,
	Paul Mackerras <paulus@...ba.org>,
	Ingo Molnar <mingo@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Waiman Long <Waiman.Long@...com>,
	Stephane Eranian <eranian@...gle.com>,
	Jiri Olsa <jolsa@...hat.com>, David Ahern <dsahern@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] perf: Support for Openembedded/Yocto -dbg packages

Hello Ingo Arnaldo and Peter

I have just posted v3,

Thanks for your comments!

On Wed, Sep 18, 2013 at 3:29 PM, Ingo Molnar <mingo@...nel.org> wrote:
>
> * Arnaldo Carvalho de Melo <acme@...stprotocols.net> wrote:
>
>> Em Wed, Sep 18, 2013 at 12:18:01PM +0200, Peter Zijlstra escreveu:
>> > On Wed, Sep 18, 2013 at 12:02:12PM +0200, Ricardo Ribalda Delgado wrote:
>> > > Perhaps this is even more clear than v2:
>>
>> > > len = snprintf(file, size, "%s", symbol_conf.symfs);
>> > > size -= len;
>> > > file += len;
>> > > len = snprintf(file, MIN(size,(last_slash - dso->long_name) + 2),
>> > > "%s",  dso->long_name);
>> > > size -= len;
>> > > file += len;
>> > > len = snprintf(file, size, ".debug%s",  last_slash);
>>
>> > len = 0;
>>
>> > len += snprintf(str + len, size - len, ...);
>> > len += snprintf(str + len, size - len, ...);
>>
>> And avoid snprintf like the plague, use scnprintf instead...  See
>> e7f01d1e3d8d501deb8abeaa269d5d48a703b8b0 for details :-)
>
> Hm, could we do:
>
>         #define snprintf scnprintf
>
> or:
>
>         #define snprintf(x...) BUILD_BUG()
>
> ?
>
> I don't think there's any valid code, except printf wrappers (which we
> don't have in perf), where the semantics of snprintf() would be needed.
>
> Thanks,
>
>         Ingo



-- 
Ricardo Ribalda
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