linux-kernel - RE: [PATCH v2 08/14] iommufd/selftest: Drop parent domain from mock_iommu_domain

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Message-ID: <BN9PR11MB52768B9E5C2F1FF97F63A2C68C7DA@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Thu, 19 Jun 2025 05:46:31 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: Nicolin Chen <nicolinc@...dia.com>, "jgg@...dia.com" <jgg@...dia.com>
CC: "will@...nel.org" <will@...nel.org>, "robin.murphy@....com"
	<robin.murphy@....com>, "joro@...tes.org" <joro@...tes.org>,
	"praan@...gle.com" <praan@...gle.com>, "Liu, Yi L" <yi.l.liu@...el.com>,
	"peterz@...radead.org" <peterz@...radead.org>, "jsnitsel@...hat.com"
	<jsnitsel@...hat.com>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>, "iommu@...ts.linux.dev"
	<iommu@...ts.linux.dev>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, "patches@...ts.linux.dev"
	<patches@...ts.linux.dev>, "baolu.lu@...ux.intel.com"
	<baolu.lu@...ux.intel.com>
Subject: RE: [PATCH v2 08/14] iommufd/selftest: Drop parent domain from
 mock_iommu_domain_nested

> From: Nicolin Chen <nicolinc@...dia.com>
> Sent: Saturday, June 14, 2025 2:35 PM
> 
> There is no use of this parent domain. Delete the dead code.
> 
> Note that the s2_parent in struct mock_viommu will be a deadcode too. Yet,
> keep it because it will be soon used by HW queue objects, i.e. no point in
> adding it back and forth in such a short window. Besides, keeping it could
> cover the majority of vIOMMU use cases where a driver-level structure will
> be larger in size than the core structure.
> 
> Signed-off-by: Nicolin Chen <nicolinc@...dia.com>

Reviewed-by: Kevin Tian <kevin.tian@...el.com>