linux-kernel - Re: linux-next: build failure after merge of the kvm tree

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Message-ID: <Yl7c06VX5Pf4ZKsa@google.com>
Date:   Tue, 19 Apr 2022 16:01:23 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
Cc:     Paolo Bonzini <pbonzini@...hat.com>, KVM <kvm@...r.kernel.org>,
        Peter Gonda <pgonda@...gle.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>
Subject: Re: linux-next: build failure after merge of the kvm tree

On Tue, Apr 19, 2022, Stephen Rothwell wrote:
> Hi all,
> 
> After merging the kvm tree, today's linux-next build (arm64 defconfig)
> failed like this:
> 
> arch/arm64/kvm/psci.c: In function 'kvm_prepare_system_event':
> arch/arm64/kvm/psci.c:184:32: error: 'struct <anonymous>' has no member named 'flags'
>   184 |         vcpu->run->system_event.flags = flags;
>       |                                ^
> 
> Caused by commit
> 
>   c24a950ec7d6 ("KVM, SEV: Add KVM_EXIT_SHUTDOWN metadata for SEV-ES")
> 
> In this commit, the uapi structure changes do not match the documentation
> changes :-(  Does it matter that the ABI may be changed by this commit
> (depending on the alignment of the structure members)?

Yeah, it's a bit of mess.  I believe we have a way out, waiting on Paolo to weigh in.

https://lore.kernel.org/all/YlisiF4BU6Uxe+iU@google.com