linux-kernel - Re: [PATCH v8 2/5] perf config: Bring declarations about config from util/cache.h to util/config.h

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Date:	Fri, 10 Jun 2016 15:20:43 +0900
From:	Taeung Song <treeze.taeung@...il.com>
To:	Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
Cc:	linux-kernel@...r.kernel.org, Jiri Olsa <jolsa@...nel.org>,
	Namhyung Kim <namhyung@...nel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
	Masami Hiramatsu <mhiramat@...nel.org>,
	Wang Nan <wangnan0@...wei.com>, Jiri Olsa <jolsa@...hat.com>
Subject: Re: [PATCH v8 2/5] perf config: Bring declarations about config from
 util/cache.h to util/config.h

Hi, Arnaldo :)

Thank you for your review.

On 06/09/2016 10:29 PM, Arnaldo Carvalho de Melo wrote:
> Em Wed, Jun 08, 2016 at 09:36:50PM +0900, Taeung Song escreveu:
>> Lately util/config.h has been added
>> but util/cache.h has declarations of functions
>> and extern variable for config features.
>>
>> To manage codes about configuration at one spot, move them
>> to util/config.h and util/cache.h include util/config.h
>>
>> Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
>> Cc: Jiri Olsa <jolsa@...hat.com>
>> Cc: Masami Hiramatsu <mhiramat@...nel.org>
>> Cc: Namhyung Kim <namhyung@...nel.org>
>> Cc: Wang Nan <wangnan0@...wei.com>
>> Signed-off-by: Taeung Song <treeze.taeung@...il.com>
>> ---
>>   tools/perf/util/cache.h  | 13 +------------
>>   tools/perf/util/config.h | 12 ++++++++++++
>>   2 files changed, 13 insertions(+), 12 deletions(-)
>>
>> diff --git a/tools/perf/util/cache.h b/tools/perf/util/cache.h
>> index 0d814bb..cd8cd4d 100644
>> --- a/tools/perf/util/cache.h
>> +++ b/tools/perf/util/cache.h
>> @@ -7,6 +7,7 @@
>>   #include <subcmd/pager.h>
>>   #include "../perf.h"
>>   #include "../ui/ui.h"
>> +#include "config.h"
>
> Why have you added that? Are those config functions used in cache.h?
>

Yes, it does. Many source files include cache.h
e.g. builtin-annoate.c, util/color.c, builtin-report.c and etc.
And They can use perf_config() function including this header file.

So, If I totally eliminate not only declarations about config
but also #include "util/config.h" at util/cache.h,
we should add '#include "util/config.h"' to each source file that
need perf_config() overall.

But IMHO, if cache.h include config.h,
we don't need to find source files that use perf_config().

Thanks,
Taeung