linux-kernel - Re: [PATCH] RDMA/irdma: fix irdma_alloc_ucontext

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Message-ID: <20251217014635.GD148079@nvidia.com>
Date: Tue, 16 Dec 2025 21:46:35 -0400
From: Jason Gunthorpe <jgg@...dia.com>
To: Arnd Bergmann <arnd@...nel.org>
Cc: Krzysztof Czurylo <krzysztof.czurylo@...el.com>,
	Tatyana Nikolova <tatyana.e.nikolova@...el.com>,
	Leon Romanovsky <leon@...nel.org>,
	Faisal Latif <faisal.latif@...el.com>,
	Arnd Bergmann <arnd@...db.de>,
	Mustafa Ismail <mustafa.ismail@...el.com>,
	linux-rdma@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] RDMA/irdma: fix irdma_alloc_ucontext_resp padding

On Mon, Dec 08, 2025 at 02:38:44PM +0100, Arnd Bergmann wrote:
> From: Arnd Bergmann <arnd@...db.de>
> 
> A recent modified struct irdma_alloc_ucontext_resp by adding a member
> with implicit padding in front of it, changing the ABI in an
> incompatibible way on all architectures other than m68k, as
> reported by scripts/check-uapi.sh:

The growth of the structure should be tolerated, that is how the ABI
is expected to work, though this is wrong and should be fixed while we
still can.

Applied to for-rc

Thanks,
Jason