linux-kernel - Re: [PATCH] KVM: Remove subtle "struct kvm_stats

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Message-ID: <176823927133.1374677.16641795988105461817.b4-ty@google.com>
Date: Mon, 12 Jan 2026 09:38:38 -0800
From: Sean Christopherson <seanjc@...gle.com>
To: Sean Christopherson <seanjc@...gle.com>, Marc Zyngier <maz@...nel.org>, Oliver Upton <oupton@...nel.org>, 
	Tianrui Zhao <zhaotianrui@...ngson.cn>, Bibo Mao <maobibo@...ngson.cn>, 
	Huacai Chen <chenhuacai@...nel.org>, Madhavan Srinivasan <maddy@...ux.ibm.com>, 
	Anup Patel <anup@...infault.org>, Paul Walmsley <pjw@...nel.org>, 
	Palmer Dabbelt <palmer@...belt.com>, Albert Ou <aou@...s.berkeley.edu>, 
	Christian Borntraeger <borntraeger@...ux.ibm.com>, Janosch Frank <frankja@...ux.ibm.com>, 
	Claudio Imbrenda <imbrenda@...ux.ibm.com>, Paolo Bonzini <pbonzini@...hat.com>
Cc: linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev, 
	kvm@...r.kernel.org, loongarch@...ts.linux.dev, linux-mips@...r.kernel.org, 
	linuxppc-dev@...ts.ozlabs.org, kvm-riscv@...ts.infradead.org, 
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org, 
	"Gustavo A . R . Silva" <gustavoars@...nel.org>
Subject: Re: [PATCH] KVM: Remove subtle "struct kvm_stats_desc" pseudo-overlay

On Fri, 05 Dec 2025 15:26:55 -0800, Sean Christopherson wrote:
> Remove KVM's internal pseudo-overlay of kvm_stats_desc, which subtly
> aliases the flexible name[] in the uAPI definition with a fixed-size array
> of the same name.  The unusual embedded structure results in compiler
> warnings due to -Wflex-array-member-not-at-end, and also necessitates an
> extra level of dereferencing in KVM.  To avoid the "overlay", define the
> uAPI structure to have a fixed-size name when building for the kernel.
> 
> [...]

Applied to kvm-x86 generic, thanks!

[1/1] KVM: Remove subtle "struct kvm_stats_desc" pseudo-overlay
      https://github.com/kvm-x86/linux/commit/da142f3d373a

--
https://github.com/kvm-x86/linux/tree/next