linux-kernel - Re: [PATCH] KVM: use struct_size() and flex_array_size() helpers in kvm_io_bus_unregister

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Message-Id: <20200921125457.E1233218AC@mail.kernel.org>
Date:   Mon, 21 Sep 2020 12:54:57 +0000
From:   Sasha Levin <sashal@...nel.org>
To:     pbonzini@...hat.com, vkuznets@...hat.com, gustavoars@...nel.org
Cc:     stable@...r.kernel.org
Subject: Re: [PATCH] KVM: use struct_size() and flex_array_size() helpers in kvm_io_bus_unregister_dev()

Hi

[This is an automated email]

This commit has been processed because it contains a -stable tag.
The stable tag indicates that it's relevant for the following trees: all

The bot has tested the following trees: v5.8.10, v5.4.66, v4.19.146, v4.14.198, v4.9.236, v4.4.236.

v5.8.10: Build OK!
v5.4.66: Build failed! Errors:
    virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function ‘flex_array_size’; did you mean ‘array_size’? [-Werror=implicit-function-declaration]
    virt/kvm/kvm_main.c:4034:30: error: ‘range’ undeclared (first use in this function)
    virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function ‘flex_array_size’; did you mean ‘array_size’? [-Werror=implicit-function-declaration]
    virt/kvm/kvm_main.c:4034:30: error: ‘range’ undeclared (first use in this function)
    arch/s390/kvm/../../../virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function 'flex_array_size'; did you mean 'array_size'? [-Werror=implicit-function-declaration]
    arch/s390/kvm/../../../virt/kvm/kvm_main.c:4034:30: error: 'range' undeclared (first use in this function)
    virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function ‘flex_array_size’; did you mean ‘array_size’? [-Werror=implicit-function-declaration]
    virt/kvm/kvm_main.c:4034:30: error: ‘range’ undeclared (first use in this function)
    virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function ‘flex_array_size’; did you mean ‘array_size’? [-Werror=implicit-function-declaration]
    virt/kvm/kvm_main.c:4034:30: error: ‘range’ undeclared (first use in this function)
    arch/s390/kvm/../../../virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function 'flex_array_size'; did you mean 'array_size'? [-Werror=implicit-function-declaration]
    arch/s390/kvm/../../../virt/kvm/kvm_main.c:4034:30: error: 'range' undeclared (first use in this function)
    virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function ‘flex_array_size’; did you mean ‘array_size’? [-Werror=implicit-function-declaration]
    virt/kvm/kvm_main.c:4034:30: error: ‘range’ undeclared (first use in this function)
    virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function ‘flex_array_size’; did you mean ‘array_size’? [-Werror=implicit-function-declaration]
    virt/kvm/kvm_main.c:4034:30: error: ‘range’ undeclared (first use in this function)
    arch/s390/kvm/../../../virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function 'flex_array_size'; did you mean 'array_size'? [-Werror=implicit-function-declaration]
    arch/s390/kvm/../../../virt/kvm/kvm_main.c:4034:30: error: 'range' undeclared (first use in this function)
    virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function ‘flex_array_size’; did you mean ‘array_size’? [-Werror=implicit-function-declaration]
    virt/kvm/kvm_main.c:4034:30: error: ‘range’ undeclared (first use in this function)
    virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function ‘flex_array_size’; did you mean ‘array_size’? [-Werror=implicit-function-declaration]
    virt/kvm/kvm_main.c:4034:30: error: ‘range’ undeclared (first use in this function)
    arch/s390/kvm/../../../virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function 'flex_array_size'; did you mean 'array_size'? [-Werror=implicit-function-declaration]
    arch/s390/kvm/../../../virt/kvm/kvm_main.c:4034:30: error: 'range' undeclared (first use in this function)
    arch/arm64/kvm/../../../virt/kvm/kvm_main.c:4034:5: error: implicit declaration of function 'flex_array_size'; did you mean 'array_size'? [-Werror=implicit-function-declaration]
    arch/arm64/kvm/../../../virt/kvm/kvm_main.c:4034:30: error: 'range' undeclared (first use in this function)

v4.19.146: Failed to apply! Possible dependencies:
    0804c849f1df ("kvm/x86 : add coalesced pio support")
    360cae313702 ("KVM: PPC: Book3S HV: Nested guest entry via hypercall")
    41f4e631daf8 ("KVM: PPC: Book3S HV: Extract PMU save/restore operations as C-callable functions")
    89329c0be8bd ("KVM: PPC: Book3S HV: Clear partition table entry on vm teardown")
    8e3f5fc1045d ("KVM: PPC: Book3S HV: Framework and hcall stubs for nested virtualization")
    90952cd38859 ("kvm: Use struct_size() in kmalloc()")
    95a6432ce903 ("KVM: PPC: Book3S HV: Streamlined guest entry/exit path on P9 for radix guests")
    9943450b7b88 ("kvm/x86 : add document for coalesced mmio")
    aa069a996951 ("KVM: PPC: Book3S HV: Add a VM capability to enable nested virtualization")
    b12ce36a43f2 ("kvm: Add memcg accounting to KVM allocations")
    df709a296ef7 ("KVM: PPC: Book3S HV: Simplify real-mode interrupt handling")
    f7035ce9f1df ("KVM: PPC: Book3S HV: Move interrupt delivery on guest entry to C code")

v4.14.198: Failed to apply! Possible dependencies:
    0804c849f1df ("kvm/x86 : add coalesced pio support")
    7bf14c28ee77 ("Merge branch 'x86/hyperv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")
    90952cd38859 ("kvm: Use struct_size() in kmalloc()")
    b12ce36a43f2 ("kvm: Add memcg accounting to KVM allocations")
    d4c67a7a54f1 ("kvm: use insert sort in kvm_io_bus_register_dev function")

v4.9.236: Failed to apply! Possible dependencies:
    0804c849f1df ("kvm/x86 : add coalesced pio support")
    4a12f9517728 ("KVM: mark kvm->busses as rcu protected")
    7bf14c28ee77 ("Merge branch 'x86/hyperv' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip")
    90952cd38859 ("kvm: Use struct_size() in kmalloc()")
    b12ce36a43f2 ("kvm: Add memcg accounting to KVM allocations")
    d4c67a7a54f1 ("kvm: use insert sort in kvm_io_bus_register_dev function")

v4.4.236: Failed to apply! Possible dependencies:
    4a12f9517728 ("KVM: mark kvm->busses as rcu protected")
    5c919412fe61 ("kvm/x86: Hyper-V synthetic interrupt controller")
    6308630bd3db ("kvm/x86: split ioapic-handled and EOI exit bitmaps")
    765eaa0f70ea ("kvm/x86: Hyper-V SynIC message slot pending clearing at SINT ack")
    90952cd38859 ("kvm: Use struct_size() in kmalloc()")
    d4c67a7a54f1 ("kvm: use insert sort in kvm_io_bus_register_dev function")
    d62caabb41f3 ("kvm/x86: per-vcpu apicv deactivation support")


NOTE: The patch will not be queued to stable trees until it is upstream.

How should we proceed with this patch?

-- 
Thanks
Sasha