linux-kernel - Re: [PATCH v2 1/4] hwspinlock: Introduce hwspin_lock

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Message-ID: <psazwqcjvivzzelb3dvpj3rkzpcp6sjckzr7mnkfvkc7bingyy@axp6rxasofbn>
Date: Tue, 28 May 2024 19:09:04 -0700
From: Bjorn Andersson <andersson@...nel.org>
To: Chris Lew <quic_clew@...cinc.com>
Cc: Baolin Wang <baolin.wang@...ux.alibaba.com>, 
	Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>, 
	Waiman Long <longman@...hat.com>, Boqun Feng <boqun.feng@...il.com>, 
	Jonathan Corbet <corbet@....net>, Mathieu Poirier <mathieu.poirier@...aro.org>, 
	Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Conor Dooley <conor+dt@...nel.org>, Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>, 
	Konrad Dybcio <konrad.dybcio@...aro.org>, linux-remoteproc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-doc@...r.kernel.org, linux-arm-msm@...r.kernel.org, devicetree@...r.kernel.org, 
	Richard Maina <quic_rmaina@...cinc.com>
Subject: Re: [PATCH v2 1/4] hwspinlock: Introduce hwspin_lock_bust()

On Fri, May 24, 2024 at 06:26:40PM -0700, Chris Lew wrote:
> From: Richard Maina <quic_rmaina@...cinc.com>
> 
> When a remoteproc crashes or goes down unexpectedly this can result in
> a state where locks held by the remoteproc will remain locked possibly
> resulting in deadlock. This new API hwspin_lock_bust() allows
> hwspinlock implementers to define a bust operation for freeing previously
> acquired hwspinlocks after verifying ownership of the acquired lock.
> 
> Signed-off-by: Richard Maina <quic_rmaina@...cinc.com>
> Signed-off-by: Chris Lew <quic_clew@...cinc.com>

Reviewed-by: Bjorn Andersson <andersson@...nel.org>

Regards,
Bjorn