linux-kernel - Re: [PATCH v2] resource: provide 0args DEFINE

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Message-ID: <aVFzll3-sH1m_KGT@smile.fi.intel.com>
Date: Sun, 28 Dec 2025 20:14:46 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Christian Marangi <ansuelsmth@...il.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
	Bjorn Helgaas <bhelgaas@...gle.com>, linux-kernel@...r.kernel.org,
	Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
Subject: Re: [PATCH v2] resource: provide 0args DEFINE_RES variant for unset
 resource desc

On Sat, Dec 13, 2025 at 12:53:09PM +0100, Christian Marangi wrote:
> Provide a variant of DEFINE_RES that takes 0 arguments to initialize an
> "unset" resource descriptor.
> 
> This should be used for the improper case of
> 
> 	struct resource res = {};
> 
> where DEFINE_RES() should be used.
> 
> With this new helper variant, it would result in:
> 
> 	struct resource res = DEFINE_RES();
> 
> instead of having to define the full 3 arguments:
> 
> 	struct resource res = DEFINE_RES(0, 0, IORESOURCE_UNSET);
> 
> DEFINE_RES() with no args, will set the flags to IORESOURCE_UNSET
> signaling the resource descriptor is UNSET and doesn't reflect an actual
> resource currently.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>

-- 
With Best Regards,
Andy Shevchenko