original_kernel/virt/kvm/vfio.h

#ifndef __KVM_VFIO_H
#define __KVM_VFIO_H

#ifdef CONFIG_KVM_VFIO
int kvm_vfio_ops_init(void);
#else
static inline int kvm_vfio_ops_init(void)
{
	return 0;
}
#endif

#endif
kvm-vfio: do not use module_init /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. 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. Repair it by making kvm_vfio_ops_init weak, and checking it in kvm_init. Cc: Will Deacon <will.deacon@arm.com> Cc: Gleb Natapov <gleb@kernel.org> Cc: Alex Williamson <Alex.Williamson@redhat.com> Fixes: 80ce1639727e9d38729c34f162378508c307ca25 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> 2014-09-24 19:02:46 +08:00			`#ifndef __KVM_VFIO_H`
			`#define __KVM_VFIO_H`

			`#ifdef CONFIG_KVM_VFIO`
			`int kvm_vfio_ops_init(void);`
			`#else`
			`static inline int kvm_vfio_ops_init(void)`
			`{`
			`return 0;`
			`}`
			`#endif`

			`#endif`