From: Randy Dunlap <rdunlap@infradead.org>
To: Ingo Molnar <mingo@kernel.org>
Cc: linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>, Will Deacon <will@kernel.org>,
Waiman Long <longman@redhat.com>,
Boqun Feng <boqun.feng@gmail.com>,
Chris Zankel <chris@zankel.net>,
Max Filippov <jcmvbkbc@gmail.com>,
linux-xtensa@linux-xtensa.org,
Johannes Berg <johannes@sipsolutions.net>,
Jeff Dike <jdike@addtoit.com>,
Richard Weinberger <richard@nod.at>,
Anton Ivanov <anton.ivanov@cambridgegreys.com>,
linux-um@lists.infradead.org
Subject: Re: [PATCH] LOCKDEP: use depends on LOCKDEP_SUPPORT instead of $ARCH list
Date: Sat, 22 May 2021 20:09:54 -0700 [thread overview]
Message-ID: <71d07ade-af7a-8f7e-90d8-f4431943c7f1@infradead.org> (raw)
In-Reply-To: <YKIXBpxyvhzdb1uv@gmail.com>
On 5/17/21 12:11 AM, Ingo Molnar wrote:
>
> * Randy Dunlap <rdunlap@infradead.org> wrote:
>
>> Both arch/um/ and arch/xtensa/ cause a Kconfig warning for LOCKDEP.
>> These arch-es select LOCKDEP_SUPPORT but they are not listed as one
>> of the arch-es that LOCKDEP depends on.
>>
>> Since (16) arch-es define the Kconfig symbol LOCKDEP_SUPPORT if they
>> intend to have LOCKDEP support, replace the awkward list of
>> arch-es that LOCKDEP depends on with the LOCKDEP_SUPPORT symbol.
>>
>> Fixes this kconfig warning: (for both um and xtensa)
>>
>> WARNING: unmet direct dependencies detected for LOCKDEP
>> Depends on [n]: DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y] && (FRAME_POINTER [=n] || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86)
>> Selected by [y]:
>> - PROVE_LOCKING [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y]
>> - LOCK_STAT [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y]
>> - DEBUG_LOCK_ALLOC [=y] && DEBUG_KERNEL [=y] && LOCK_DEBUGGING_SUPPORT [=y]
>>
>> Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
>> Cc: Peter Zijlstra <peterz@infradead.org>
>> Cc: Ingo Molnar <mingo@redhat.com>
>> Cc: Will Deacon <will@kernel.org>
>> Cc: Waiman Long <longman@redhat.com>
>> Cc: Boqun Feng <boqun.feng@gmail.com>
>> Cc: Chris Zankel <chris@zankel.net>
>> Cc: Max Filippov <jcmvbkbc@gmail.com>
>> Cc: linux-xtensa@linux-xtensa.org
>> Cc: Johannes Berg <johannes@sipsolutions.net>
>> Cc: Jeff Dike <jdike@addtoit.com>
>> Cc: Richard Weinberger <richard@nod.at>
>> Cc: Anton Ivanov <anton.ivanov@cambridgegreys.com>
>> Cc: linux-um@lists.infradead.org
>> ---
>> lib/Kconfig.debug | 2 +-
>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> --- linux-next-20210514.orig/lib/Kconfig.debug
>> +++ linux-next-20210514/lib/Kconfig.debug
>> @@ -1383,7 +1383,7 @@ config LOCKDEP
>> bool
>> depends on DEBUG_KERNEL && LOCK_DEBUGGING_SUPPORT
>> select STACKTRACE
>> - depends on FRAME_POINTER || MIPS || PPC || S390 || MICROBLAZE || ARM || ARC || X86
>> + depends on FRAME_POINTER || LOCKDEP_SUPPORT
>
> Ok - the FRAME_POINTER bit is weird. Are there any architectures that have
> FRAME_POINTER defined but no LOCKDEP_SUPPORT?
arch/h8300/ does AFAICT.
and arch/parisc/ has user-choosable FRAME_POINTER and no LOCKDEP support.
--
~Randy
prev parent reply other threads:[~2021-05-23 3:10 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-17 3:44 [PATCH] LOCKDEP: use depends on LOCKDEP_SUPPORT instead of $ARCH list Randy Dunlap
2021-05-17 7:11 ` Ingo Molnar
2021-05-17 14:02 ` Waiman Long
2021-05-23 3:12 ` Randy Dunlap
2021-05-24 19:47 ` Randy Dunlap
2021-05-24 21:04 ` Waiman Long
2021-05-24 21:31 ` Randy Dunlap
2021-05-24 21:41 ` Randy Dunlap
2021-05-25 0:05 ` Waiman Long
2021-05-25 4:18 ` Randy Dunlap
2021-05-25 14:15 ` Waiman Long
2021-05-23 3:09 ` Randy Dunlap [this message]
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