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Subject: Re: [PATCH v2] irqchip/gic: Allow self-SGIs for SMP on UP
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To: Fabio Estevam <festevam@gmail.com>, stable@vger.kernel.org
References: <1473428682-14552-1-git-send-email-festevam@gmail.com>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
From: Marc Zyngier <marc.zyngier@arm.com>
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Date: Fri, 9 Sep 2016 15:40:49 +0100
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Hi Fabio,

On 09/09/16 14:44, Fabio Estevam wrote:
> From: Marc Zyngier <marc.zyngier@arm.com>
> 
> commit 059e232089e45b0befc9933d31209c225e08b426 upstream.
> 
> On systems where a single CPU is present, the GIC may not support
> having SGIs delivered to a target list. In that case, we use the
> self-SGI mechanism to allow the interrupt to be delivered locally.
> 
> Cc: <stable@vger.kernel.org> # 4.7.x
> Tested-by: Fabio Estevam <fabio.estevam@nxp.com>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

I'm sorry, but what is the justification for this to be backported to a
stable kernel? It is not a regression, since we never supported this
kind of HW before. This is not a workaround for an erratum either.

If that was a kernel bug, why not backport it all the way the the oldest
stable, instead of limiting it to v4.7?

Thanks,

	M.
-- 
Jazz is not dead. It just smells funny...