linux-kernel - Re: [PATCH 2/2] sched_clock: Disable seqlock lockdep usage in sched

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Message-ID: <52C6085C.3070206@codeaurora.org>
Date:	Thu, 02 Jan 2014 16:46:20 -0800
From:	Stephen Boyd <sboyd@...eaurora.org>
To:	John Stultz <john.stultz@...aro.org>,
	LKML <linux-kernel@...r.kernel.org>
CC:	Krzysztof Hałasa <khalasa@...p.pl>,
	Uwe Kleine-König 
	<u.kleine-koenig@...gutronix.de>, Willy Tarreau <w@....eu>,
	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 2/2] sched_clock: Disable seqlock lockdep usage in sched_clock

On 01/02/14 15:11, John Stultz wrote:
> Unforunately the seqlock lockdep enablmenet can't be used

s/Unforunately/Unfortunately/
s/enablmenet/enablement/

> in sched_clock, since the lockdep infrastructure eventually
> calls into sched_clock, which causes a deadlock.
>
> Thus, this patch changes all generic sched_clock usage
> to use the raw_* methods.
>
> Cc: Krzysztof Hałasa <khalasa@...p.pl>
> Cc: Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
> Cc: Willy Tarreau <w@....eu>
> Cc: Ingo Molnar <mingo@...nel.org>,
> Cc: Peter Zijlstra <peterz@...radead.org>
> Cc: Stephen Boyd <sboyd@...eaurora.org>
> Cc: Linus Torvalds <torvalds@...ux-foundation.org>
> Cc: linux-arm-kernel@...ts.infradead.org
> Reported-by: Krzysztof Hałasa <khalasa@...p.pl>
> Signed-off-by: John Stultz <john.stultz@...aro.org>

Reviewed-by: Stephen Boyd <sboyd@...eaurora.org>

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