linux-kernel - Re: [PATCH -next] optprobes: fix kconfig depends/selects

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Message-ID: <AANLkTikL0JEiWjms9DPYK=jfNmOP78HC7qu+deO5+dP6@mail.gmail.com>
Date:	Sun, 12 Sep 2010 21:41:07 +0300
From:	Felipe Contreras <felipe.contreras@...il.com>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	lkml <linux-kernel@...r.kernel.org>, linux-next@...r.kernel.org,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
	"David S. Miller" <davem@...emloft.net>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	akpm <akpm@...ux-foundation.org>
Subject: Re: [PATCH -next] optprobes: fix kconfig depends/selects

On Sun, Sep 12, 2010 at 9:34 PM, Randy Dunlap <randy.dunlap@...cle.com> wrote:
> On 09/12/10 03:49, Felipe Contreras wrote:
>> On Thu, Aug 12, 2010 at 10:26 PM, Randy Dunlap <randy.dunlap@...cle.com> wrote:
>>> From: Randy Dunlap <randy.dunlap@...cle.com>
>>>
>>> KALLSYMS and KALLSYMS_ALL depend on DEBUG_KERNEL, so add that dependency.
>>> KALLSYMS_ALL depends on KALLSYMS, so select both of them, not just KALLSYMS_ALL.
>>>
>>> warning: (OPTPROBES && KPROBES && HAVE_OPTPROBES && !PREEMPT || MTD_UBI_DEBUG && MTD && SYSFS && MTD_UBI || UBIFS_FS_DEBUG && MISC_FILESYSTEMS && UBIFS_FS || LOCKDEP && DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT || LATENCYTOP && HAVE_LATENCYTOP_SUPPORT) selects KALLSYMS_ALL which has unmet direct dependencies (DEBUG_KERNEL && KALLSYMS)
>>>
>>> Signed-off-by: Randy Dunlap <randy.dunlap@...cle.com>
>>> Cc:     Ananth N Mavinakayanahalli <ananth@...ibm.com>
>>> Cc:     Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>
>>> Cc:     "David S. Miller" <davem@...emloft.net>
>>> Cc:     Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
>>> ---
>>>  arch/Kconfig |    2 ++
>>>  1 file changed, 2 insertions(+)
>>>
>>> --- linux-next-20100810.orig/arch/Kconfig
>>> +++ linux-next-20100810/arch/Kconfig
>>> @@ -45,6 +45,8 @@ config OPTPROBES
>>>        def_bool y
>>>        depends on KPROBES && HAVE_OPTPROBES
>>>        depends on !PREEMPT
>>> +       depends on DEBUG_KERNEL
>>> +       select KALLSYMS
>>>        select KALLSYMS_ALL
>>>
>>>  config HAVE_EFFICIENT_UNALIGNED_ACCESS
>>> --
>>
>> This causes another problem:
>>
>> arch/Kconfig:33:error: recursive dependency detected!
>> arch/Kconfig:33:      symbol KPROBES depends on KALLSYMS
>> init/Kconfig:825:     symbol KALLSYMS is selected by OPTPROBES
>> arch/Kconfig:44:      symbol OPTPROBES depends on KPROBES
>>
>> The 'select KALLSYMS' is redundant.
>>
>> Otherwise: Signed-off-by: Felipe Contreras <felipe.contreras@...il.com>
>
> Thanks for checking.  I saw this problem just a day or two ago myself.
>
> Dropping the select does not eliminate the kconfig warning.
> I'll try something else.

Huh? The original warning is gone by just adding 'depends on DEBUG_KERNEL'.

-- 
Felipe Contreras
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