linux-kernel - Re: [PATCH -rt] lockdep: selftest: fix warnings due to missing PREEMPT

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Date:	Wed, 28 Jan 2015 15:06:59 -0600
From:	Xander Huff <xander.huff@...com>
To:	mingo@...hat.com, peterz@...radead.org, rostedt@...dmis.org
CC:	linux-rt-users@...r.kernel.org, josh.cartwright@...com,
	gratian.crisan@...com, linux-kernel@...r.kernel.org,
	jaeden.amero@...com, ben.shelton@...com, brad.mouring@...com,
	rich.tollerton@...com
Subject: Re: [PATCH -rt] lockdep: selftest: fix warnings due to missing PREEMPT_RT
 conditionals

On 1/28/2015 1:08 PM, Xander Huff wrote:
> From: Josh Cartwright <josh.cartwright@...com>
>
> "lockdep: Selftest: Only do hardirq context test for raw spinlock"
> disabled the execution of certain tests with PREEMPT_RT_FULL, but did
> not prevent the tests from still being defined.  This leads to warnings
> like:
>
>    ./linux/lib/locking-selftest.c:574:1: warning: 'irqsafe1_hard_rlock_12' defined but not used [-Wunused-function]
>    ./linux/lib/locking-selftest.c:574:1: warning: 'irqsafe1_hard_rlock_21' defined but not used [-Wunused-function]
>    ./linux/lib/locking-selftest.c:577:1: warning: 'irqsafe1_hard_wlock_12' defined but not used [-Wunused-function]
>    ./linux/lib/locking-selftest.c:577:1: warning: 'irqsafe1_hard_wlock_21' defined but not used [-Wunused-function]
>    ./linux/lib/locking-selftest.c:580:1: warning: 'irqsafe1_soft_spin_12' defined but not used [-Wunused-function]
>    ...
>
> Fixed by wrapping the test definitions in #ifndef CONFIG_PREEMPT_RT_FULL
> conditionals.
>
> Signed-off-by: Josh Cartwright <josh.cartwright@...com>
> Signed-off-by: Xander Huff <xander.huff@...com>
> Acked-by: Gratian Crisan <gratian.crisan@...com>

FYI: To be clearer, this should apply to all stable RT releases 3.4 and later.

-- 
Xander Huff
Staff Software Engineer
National Instruments
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