linux-kernel - Re: [PATCH] arm64: replace read_lock to rcu lock in call_step

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Message-ID: <20160209090219.GA13035@linutronix.de>
Date:	Tue, 9 Feb 2016 10:02:19 +0100
From:	Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:	Yang Shi <yang.shi@...aro.org>
Cc:	rostedt@...dmis.org, catalin.marinas@....com, will.deacon@....com,
	linux-kernel@...r.kernel.org, linux-rt-users@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linaro-kernel@...ts.linaro.org
Subject: Re: [PATCH] arm64: replace read_lock to rcu lock in call_step_hook

* Yang Shi | 2016-02-08 14:49:24 [-0800]:

>BUG: sleeping function called from invalid context at kernel/locking/rtmutex.c:917
…
>This issue is similar with 62c6c61("arm64: replace read_lock to rcu lock in
>call_break_hook"), but comes to single_step_handler.
>
>This also solves kgdbts boot test silent hang issue on 4.4 -rt kernel.

I am going to apply this for -RT.

Sebastian