linux-kernel - Re: [PATCH] arm64: make irq_stack

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Message-ID: <20160212174116.GI17901@arm.com>
Date:	Fri, 12 Feb 2016 17:41:16 +0000
From:	Will Deacon <will.deacon@....com>
To:	"Shi, Yang" <yang.shi@...aro.org>
Cc:	James Morse <james.morse@....com>, catalin.marinas@....com,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linaro-kernel@...ts.linaro.org
Subject: Re: [PATCH] arm64: make irq_stack_ptr more robust

On Fri, Feb 12, 2016 at 09:38:51AM -0800, Shi, Yang wrote:
> On 2/12/2016 5:47 AM, James Morse wrote:
> >On 11/02/16 21:53, Yang Shi wrote:
> >>Switching between stacks is only valid if we are tracing ourselves while on the
> >>irq_stack, so it is only valid when in current and non-preemptible context,
> >>otherwise is is just zeroed off.
> >
> >Given it was picked up with CONFIG_DEBUG_PREEMPT:
> >
> >Fixes: 132cd887b5c5 ("arm64: Modify stack trace and dump for use with irq_stack")
> 
> Wii add in v2.

I already queued the patch with this and the whitespace fix, so no need
for a v2.

Will