Commit 80f5b5e7 authored by Gleb Natapov's avatar Gleb Natapov
Browse files

KVM: remove vm mmap method 



It was used in conjunction with KVM_SET_MEMORY_REGION ioctl which was
removed by b74a07be in 2010, QEMU stopped using it in 2008, so
it is time to remove the code finally.

Signed-off-by: default avatarGleb Natapov <gleb@redhat.com>
parent 27ef63c7

virt/kvm/kvm_main.c

+0 −32
Original line number Diff line number Diff line
@@ -2528,44 +2528,12 @@ static long kvm_vm_compat_ioctl(struct file *filp, 
}

#endif



static int kvm_vm_fault(struct vm_area_struct *vma, struct vm_fault *vmf)

{

	struct page *page[1];

	unsigned long addr;

	int npages;

	gfn_t gfn = vmf->pgoff;

	struct kvm *kvm = vma->vm_file->private_data;



	addr = gfn_to_hva(kvm, gfn);

	if (kvm_is_error_hva(addr))

		return VM_FAULT_SIGBUS;



	npages = get_user_pages(current, current->mm, addr, 1, 1, 0, page,

				NULL);

	if (unlikely(npages != 1))

		return VM_FAULT_SIGBUS;



	vmf->page = page[0];

	return 0;

}



static const struct vm_operations_struct kvm_vm_vm_ops = {

	.fault = kvm_vm_fault,

};



static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma)

{

	vma->vm_ops = &kvm_vm_vm_ops;

	return 0;

}



static struct file_operations kvm_vm_fops = {

	.release        = kvm_vm_release,

	.unlocked_ioctl = kvm_vm_ioctl,

#ifdef CONFIG_COMPAT

	.compat_ioctl   = kvm_vm_compat_ioctl,

#endif

	.mmap           = kvm_vm_mmap,

	.llseek		= noop_llseek,

};