linux-kernel - Re: [PATCH v5 2/2] dma-buf: heaps: Introduce a new heap for reserved memory

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Message-ID: <20250630-sheep-of-fantastic-defiance-fb90c5@houat>
Date: Mon, 30 Jun 2025 10:52:05 +0200
From: Maxime Ripard <mripard@...nel.org>
To: Rob Herring <robh@...nel.org>
Cc: Saravana Kannan <saravanak@...gle.com>, 
	Sumit Semwal <sumit.semwal@...aro.org>, Benjamin Gaignard <benjamin.gaignard@...labora.com>, 
	Brian Starkey <Brian.Starkey@....com>, John Stultz <jstultz@...gle.com>, 
	"T.J. Mercier" <tjmercier@...gle.com>, Christian König <christian.koenig@....com>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Andrew Davis <afd@...com>, 
	Jared Kangas <jkangas@...hat.com>, Mattijs Korpershoek <mkorpershoek@...nel.org>, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, linux-media@...r.kernel.org, 
	dri-devel@...ts.freedesktop.org, linaro-mm-sig@...ts.linaro.org
Subject: Re: [PATCH v5 2/2] dma-buf: heaps: Introduce a new heap for reserved
 memory

On Fri, Jun 27, 2025 at 02:23:47PM -0500, Rob Herring wrote:
> > +static int __init carveout_heap_init(void)
> > +{
> > +	struct device_node *rmem_node;
> > +	struct device_node *node;
> > +	int ret;
> > +
> > +	rmem_node = of_find_node_by_path("/reserved-memory");
> > +	if (!rmem_node)
> > +		return 0;
> > +
> > +	for_each_child_of_node(rmem_node, node) {
> > +		if (!of_device_is_compatible(node, "carved-out"))
> > +			continue;
> > +
> > +		ret = carveout_heap_setup(node);
> > +		if (ret)
> > +			return ret;
> > +	}
> 
> /reserved-memory nodes get a platform_device, so why not make this a 
> driver?

Because I never realised we could :)

Thanks, I'll fix it for the next version

Maxime

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