linux-kernel - Re: [PATCH v3 01/22] hardirq/nmi: Allow nested nmi

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Message-ID: <20200220084153.GA11827@willie-the-truck>
Date:   Thu, 20 Feb 2020 08:41:53 +0000
From:   Will Deacon <will@...nel.org>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     linux-kernel@...r.kernel.org, linux-arch@...r.kernel.org,
        rostedt@...dmis.org, mingo@...nel.org, joel@...lfernandes.org,
        gregkh@...uxfoundation.org, gustavo@...eddedor.com,
        tglx@...utronix.de, paulmck@...nel.org, josh@...htriplett.org,
        mathieu.desnoyers@...icios.com, jiangshanlai@...il.com,
        luto@...nel.org, tony.luck@...el.com, frederic@...nel.org,
        dan.carpenter@...cle.com, mhiramat@...nel.org,
        Marc Zyngier <maz@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Petr Mladek <pmladek@...e.com>
Subject: Re: [PATCH v3 01/22] hardirq/nmi: Allow nested nmi_enter()

On Wed, Feb 19, 2020 at 03:47:25PM +0100, Peter Zijlstra wrote:
> Since there are already a number of sites (ARM64, PowerPC) that
> effectively nest nmi_enter(), lets make the primitive support this
> before adding even more.
> 
> Cc: Will Deacon <will@...nel.org>
> Cc: Marc Zyngier <maz@...nel.org>
> Cc: Michael Ellerman <mpe@...erman.id.au>
> Cc: Petr Mladek <pmladek@...e.com>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
> ---
>  arch/arm64/include/asm/hardirq.h |    4 ++--
>  arch/arm64/kernel/sdei.c         |   14 ++------------
>  arch/arm64/kernel/traps.c        |    8 ++------

For these arm64 bits:

Acked-by: Will Deacon <will@...nel.org>

Will