Re: trace/events: DECLARE vs DEFINE semantic

[Masami Hiramatsu <mhiramat@xxxxxxxxxx>]

Steven Rostedt wrote:
> On Thu, 2009-12-03 at 10:31 -0500, Masami Hiramatsu wrote:
>> Steven Rostedt wrote:
> 
>>>> Would you mean putting those headers in sub-system's directory?
>>>> (e.g. fs/ext4/)
>>>> In that case, a problem will happen when user want to hook those
>>>> tracepoint from their module, because it is hard to find those
>>>> local headers.
>>>
>>> Why? Modules usually do have their own headers in their sub system.
>>
>> Module's local headers usually uses only from itself. Other modules
>> may not touch it. However, AFAIK, event definitions must be referred
>> by event consumer which is another module. IOW, those local headers
>> will not be included in kernel-headers/kernel-devel package :-(
> 
> I'm a little confused. Who is the event consumer? The trace point user?
> The one that hooks into the tracepoint?

Ah, I meant the tracepoint user module, not the ftrace event consumer.

Thank you,

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

e-mail: mhiramat@xxxxxxxxxx

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