From: Heiko Carstens <hca@linux.ibm.com>
To: peterz@infradead.org
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org,
rafael.j.wysocki@intel.com, svens@linux.ibm.com
Subject: Re: [PATCH] s390/idle: Fix suspicious RCU usage
Date: Tue, 8 Sep 2020 15:41:44 +0200 [thread overview]
Message-ID: <20200908134144.GH14136@osiris> (raw)
In-Reply-To: <20200908133031.GT1362448@hirez.programming.kicks-ass.net>
On Tue, Sep 08, 2020 at 03:30:31PM +0200, peterz@infradead.org wrote:
>
> After commit eb1f00237aca ("lockdep,trace: Expose tracepoints") the
> lock tracepoints are visible to lockdep and RCU-lockdep is finding a
> bunch more RCU violations that were previously hidden.
>
> Switch the idle->seqcount over to using raw_write_*() to avoid the
> lockdep annotation and thus the lock tracepoints.
>
> Reported-by: Guenter Roeck <linux@roeck-us.net>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
> ---
> arch/s390/kernel/idle.c | 5 ++---
> 1 file changed, 2 insertions(+), 3 deletions(-)
Applied, thank you!
next prev parent reply other threads:[~2020-09-08 16:09 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-08 13:30 [PATCH] s390/idle: Fix suspicious RCU usage peterz
2020-09-08 13:41 ` Heiko Carstens [this message]
2020-10-07 7:53 ` Sven Schnelle
2020-10-07 10:05 ` Peter Zijlstra
2020-10-07 12:56 ` Peter Zijlstra
2020-10-08 8:58 ` Sven Schnelle
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