Re: [PATCH] arm: kprobe: replace patch_lock to raw lock

From	Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Newsgroups	linux.kernel
Subject	Re: [PATCH] arm: kprobe: replace patch_lock to raw lock
Date	2016-12-01 15:20 +0100
Message-ID	<sJAno-4Xx-33@gated-at.bofh.it> (permalink)
References	<sC8md-5uc-1@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 2016-11-10 16:17:55 [-0800], Yang Shi wrote:
> 
> Since patch_text_stop_machine() is called in stop_machine() which disables IRQ,
> sleepable lock should be not used in this atomic context, so replace patch_lock
> to raw lock.

I am taking this one. Thank you.
We have jump_labels() deactivated on ARM because stop_machine() may
cause latencies at runtime. kprobe and kgdb is used by the user on
purpose (and not because he changed some sched setting) I think we are
fine. I am going to document this.

> Signed-off-by: Yang Shi <yang.shi@linaro.org>

Sebastian

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Re: [PATCH] arm: kprobe: replace patch_lock to raw lock Sebastian Andrzej Siewior <bigeasy@linutronix.de> - 2016-12-01 15:20 +0100

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