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Message-ID: <5510288C.3020702@linaro.org>
Date: Mon, 23 Mar 2015 14:51:56 +0000
From: Daniel Thompson <daniel.thompson@linaro.org>
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To: Steven Rostedt <rostedt@goodmis.org>
CC: Peter Zijlstra <peterz@infradead.org>,
        linux-arm-kernel@lists.infradead.org,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>, linux-kernel@vger.kernel.org,
        patches@linaro.org, linaro-kernel@lists.linaro.org,
        John Stultz <john.stultz@linaro.org>,
        Sumit Semwal <sumit.semwal@linaro.org>,
        Marc Zyngier <marc.zyngier@arm.com>,
        Andrew Thoelke <andrew.thoelke@arm.com>,
        Dongdong Deng <dongdong.deng@windriver.com>
Subject: Re: [RFC PATCH 2/7] printk: Simple implementation for NMI backtracing
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On 19/03/15 19:01, Steven Rostedt wrote:
> On Thu, 19 Mar 2015 18:48:10 +0000
> Daniel Thompson <daniel.thompson@linaro.org> wrote:
> \
>> The barrier was not intended to have anything to do with put_cpu()
>> either though since the barrier was added before put_cpu() arrived:
>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=554ec063982752e9a569ab9189eeffa3d96731b2
>>
>> There's nothing in the commit comment explaining the barrier and I
>> really can't see what it is for.
>>
>
> Looks like it wasn't needed then either.

Agreed. I'll respin the patchset with the barrier removed.


Daniel.