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

From: Will Deacon
Date: Wed Sep 24 2014 - 07:44:41 EST

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!

> 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...

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