linux-kernel - RE: [PATCH][next] iommufd/iommufd_private.h: Avoid -Wflex-array-member-not-at-end warning

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Message-ID: <BN9PR11MB52763EB809B77AA1CF9125CE8CC9A@BN9PR11MB5276.namprd11.prod.outlook.com>
Date: Mon, 17 Nov 2025 07:13:10 +0000
From: "Tian, Kevin" <kevin.tian@...el.com>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>, Jason Gunthorpe
	<jgg@...pe.ca>, Joerg Roedel <joro@...tes.org>, Will Deacon
	<will@...nel.org>, Robin Murphy <robin.murphy@....com>
CC: "iommu@...ts.linux.dev" <iommu@...ts.linux.dev>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-hardening@...r.kernel.org" <linux-hardening@...r.kernel.org>
Subject: RE: [PATCH][next] iommufd/iommufd_private.h: Avoid
 -Wflex-array-member-not-at-end warning

> From: Gustavo A. R. Silva <gustavoars@...nel.org>
> Sent: Monday, November 10, 2025 7:36 PM
> 
> -Wflex-array-member-not-at-end was introduced in GCC-14, and we are
> getting ready to enable it, globally.
> 
> Move the conflicting declaration to the end of the corresponding
> structure. Notice that struct iommufd_vevent is a flexible
> structure, this is a structure that contains a flexible-array
> member.
> 
> Fix the following warning:
> 
> drivers/iommu/iommufd/iommufd_private.h:621:31: warning: structure
> containing a flexible array member is not at the end of another structure [-
> Wflex-array-member-not-at-end]
> 
> Signed-off-by: Gustavo A. R. Silva <gustavoars@...nel.org>

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