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To: "Naveen N. Rao" <naveen.n.rao@linux.vnet.ibm.com>
From: Michael Ellerman <patch-notifications@ellerman.id.au>
Cc: linuxppc-dev@lists.ozlabs.org, Masami Hiramatsu <mhiramat@kernel.org>
Subject: Re: [1/4] powerpc/kprobes: Disable preemption before invoking probe
 handler for optprobes
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Date: Tue, 14 Nov 2017 22:12:09 +1100 (AEDT)
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On Mon, 2017-10-23 at 16:37:38 UTC, "Naveen N. Rao" wrote:
> Per Documentation/kprobes.txt, probe handlers need to be invoked with
> preemption disabled. Update optimized_callback() to do so. Also move
> get_kprobe_ctlblk() invocation post preemption disable, since it
> accesses pre-cpu data.
> 
> This was not an issue so far since optprobes wasn't selected if
> CONFIG_PREEMPT was enabled. Commit a30b85df7d599f ("kprobes: Use
> synchronize_rcu_tasks() for optprobe with CONFIG_PREEMPT=y") changes
> this.
> 
> Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
> Acked-by: Masami Hiramatsu <mhiramat@kernel.org>

Series applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/8a2d71a3f2737e2448aa68de2b6052

cheers