Re: [PATCH] arm: kprobe: replace patch_lock to raw lock
From: Sebastian Andrzej Siewior
Date: Thu Dec 01 2016 - 09:12:55 EST
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@xxxxxxxxxx>
Sebastian