linux-kernel - Re: [RFC PATCH v8 1/4] arm64: Make all stack walking functions use arch_stack

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Message-ID: <f906ab5f-cfa8-17b5-843f-77869cf48586@linux.microsoft.com>
Date:   Tue, 24 Aug 2021 12:40:53 -0500
From:   "Madhavan T. Venkataraman" <madvenka@...ux.microsoft.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     Mark Rutland <mark.rutland@....com>, jpoimboe@...hat.com,
        ardb@...nel.org, nobuta.keiya@...itsu.com,
        sjitindarsingh@...il.com, catalin.marinas@....com, will@...nel.org,
        jmorris@...ei.org, pasha.tatashin@...een.com, jthierry@...hat.com,
        linux-arm-kernel@...ts.infradead.org,
        live-patching@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH v8 1/4] arm64: Make all stack walking functions use
 arch_stack_walk()



On 8/24/21 12:38 PM, Mark Brown wrote:
> On Tue, Aug 24, 2021 at 12:21:28PM -0500, Madhavan T. Venkataraman wrote:
>> On 8/24/21 8:13 AM, Mark Rutland wrote:
>>> On Thu, Aug 12, 2021 at 02:06:00PM -0500, madvenka@...ux.microsoft.com wrote:
> 
>>> Note that arch_stack_walk() depends on CONFIG_STACKTRACE (which is not in
>>> defconfig), so we'll need to reorganise things such that it's always defined,
>>> or factor out the core of that function and add a wrapper such that we
>>> can always use it.
> 
>> I will include CONFIG_STACKTRACE in defconfig, if that is OK with you and
>> Mark Brown.
> 
> That might be separately useful but it doesn't address the issue, if
> something is optional we need to handle the case where that option is
> disabled.  It'll need to be one of the two options Mark Rutland
> mentioned above.
> 

OK. I will do it so it is always defined.

Thanks.

Madhavan