linux-kernel - Re: [PATCH 13/41] perf tools: Add machine__kernel

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Message-ID: <53E8BB34.1050700@intel.com>
Date:	Mon, 11 Aug 2014 15:46:44 +0300
From:	Adrian Hunter <adrian.hunter@...el.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	Arnaldo Carvalho de Melo <acme@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 13/41] perf tools: Add machine__kernel_ip()

On 08/11/2014 03:43 PM, Jiri Olsa wrote:
> On Mon, Aug 11, 2014 at 03:36:40PM +0300, Adrian Hunter wrote:
>> On 08/11/2014 03:23 PM, Jiri Olsa wrote:
>>> On Wed, Jul 16, 2014 at 05:22:22PM +0300, Adrian Hunter wrote:
>>>> On 16/07/2014 5:15 p.m., Jiri Olsa wrote:
>>>>> On Mon, Jul 14, 2014 at 01:02:37PM +0300, Adrian Hunter wrote:
>>>>>
>>>>> SNIP
>>>>>
>>>>>> +
>>>>>> +int machine__get_kernel_start(struct machine *machine)
>>>>>> +{
>>>>>> +	struct map *map = machine__kernel_map(machine, MAP__FUNCTION);
>>>>>> +	int err = 0;
>>>>>> +
>>>>>> +	/*
>>>>>> +	 * The only addresses above 2^63 are kernel addresses of a 64-bit
>>>>>> +	 * kernel.  Note that addresses are unsigned so that on a 32-bit system
>>>>>> +	 * all addresses including kernel addresses are less than 2^32.  In
>>>>>> +	 * that case (32-bit system), if the kernel mapping is unknown, all
>>>>>> +	 * addresses will be assumed to be in user space - see
>>>>>> +	 * machine__kernel_ip().
>>>>>> +	 */
>>>>>> +	machine->kernel_start = 1ULL << 63;
>>>>>> +	if (map) {
>>>>>> +		err = map__load(map, machine->symbol_filter);
>>>>>> +		if (map->start)
>>>>>> +			machine->kernel_start = map->start;
>>>>>> +	}
>>>>>> +	return err;
>>>>>> +}
>>>>>
>>>>> we just recently got machine__get_kernel_start_addr function,
>>>>> I think we want just one function for this
>>>>
>>>> They do quite different things.
>>>>
>>>
>>> so one of those two should have different name
>>
>> Such as?
> 
> dont know ;-) but if they do 'quite different things' as u said,
> I expect to see that at least in the function name

How about:

	machine__get_kernel_start_addr -> machine__get_running_kernel_start


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