linux-kernel - Re: [PATCH v2] KVM: SVM: hyper-v: placate modpost section mismatch error

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Message-ID: <27364a82-fa60-1454-e25d-15239905baf3@redhat.com>
Date:   Wed, 22 Feb 2023 19:32:53 +0100
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     linux-kernel@...r.kernel.org,
        Vineeth Pillai <viremana@...ux.microsoft.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>, kvm@...r.kernel.org
Subject: Re: [PATCH v2] KVM: SVM: hyper-v: placate modpost section mismatch
 error

On 2/22/23 17:46, Sean Christopherson wrote:
>    Tag svm_hv_hardware_setup() with __init to fix a modpost warning as the
>    non-stub implementation accesses __initdata (svm_x86_ops), i.e. would
>    generate a use-after-free if svm_hv_hardware_setup() were actually invoked
>    post-init.  The helper is only called from svm_hardware_setup(), which is
>    also __init, i.e. other than the modpost warning, lack of __init is benign.

Done.  It's caused by the compiler deciding not to inline the function, 
probably.

Also Cc'ed stable.

Paolo