linux-kernel - Re: [PATCH 2.6.27-rc3 26/29] mdb: export task

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Message-ID: <44303.166.70.238.45.1218724556.squirrel@webmail.wolfmountaingroup.com>
Date:	Thu, 14 Aug 2008 08:35:56 -0600 (MDT)
From:	jmerkey@...fmountaingroup.com
To:	"Pekka Enberg" <penberg@...helsinki.fi>
Cc:	jmerkey@...fmountaingroup.com, linux-kernel@...r.kernel.org,
	"Ingo Molnar" <mingo@...e.hu>
Subject: Re: [PATCH 2.6.27-rc3 26/29] mdb: export task_curr

> On Thu, Aug 14, 2008 at 9:14 AM,  <jmerkey@...fmountaingroup.com> wrote:
>> export the task_curr function to the module based kernel debugger to
>> enable
>> process back tracing and state display.
>>
>> Signed-off-by: Jeffrey Vernon Merkey (jmerkey@...fmountaingroup.com)
>>
>> --- a/kernel/sched.c    2008-08-13 14:22:32.000000000 -0600
>> +++ b/kernel/sched.c    2008-08-13 11:56:03.000000000 -0600
>> @@ -1736,6 +1736,9 @@
>>  {
>>        return cpu_curr(task_cpu(p)) == p;
>>  }
>> +#if defined(CONFIG_MDB_MODULE)
>> +EXPORT_SYMBOL_GPL(task_curr);
>> +#endif
>
> We usually don't export symbols conditionally, especially in core kernel
> code.
>

Well,then please suggest how a kernel debugger can be module based and still
be able to get this information some other way that's generic and minimal
impact.

Jeff


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