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

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Message-ID: <20251121194137.GE233636@ziepe.ca>
Date: Fri, 21 Nov 2025 15:41:37 -0400
From: Jason Gunthorpe <jgg@...pe.ca>
To: "Gustavo A. R. Silva" <gustavoars@...nel.org>
Cc: Kevin Tian <kevin.tian@...el.com>, Joerg Roedel <joro@...tes.org>,
	Will Deacon <will@...nel.org>, Robin Murphy <robin.murphy@....com>,
	iommu@...ts.linux.dev, linux-kernel@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH][next] iommufd/iommufd_private.h: Avoid
 -Wflex-array-member-not-at-end warning

On Mon, Nov 10, 2025 at 08:35:31PM +0900, Gustavo A. R. Silva wrote:
> -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>
> ---
>  drivers/iommu/iommufd/iommufd_private.h | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)

Applied thanks

Jason