Re: [PATCH] kvm-vfio: do not use module_init

From: Paolo Bonzini
Date: Wed Sep 24 2014 - 07:46:08 EST

Il 24/09/2014 13:44, Will Deacon ha scritto:
> On Wed, Sep 24, 2014 at 12:29:09PM +0100, Paolo Bonzini wrote:
>> /me got confused between the kernel and QEMU. In the kernel, you can
>> only have one module_init function, and it will prevent unloading the
>> module unless you also have the corresponding module_exit function.
> Happy for you to take the blame, but I think this one's my fault!

That's why you were CCed! ;)

>> So, commit 80ce1639727e (KVM: VFIO: register kvm_device_ops dynamically,
>> 2014-09-02) broke unloading of the kvm module, by adding a module_init
>> function and no module_exit.
> I forget kvm builds as a module for other architectures (ie. not arm/arm64).
>> Repair it by making kvm_vfio_ops_init weak, and checking it in
>> kvm_init.
> Hehe, if only there was a kconfig option for kvm-vfio.c...

Yeah, I was tempted to put it back. What do you think?


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