On Thu, Dec 14, 2017 at 08:35:50AM -0800, Andy Lutomirski wrote:
> > @@ -3252,6 +3256,7 @@ static const struct vm_operations_struct
> > .fault = special_mapping_fault,
> > .mremap = special_mapping_mremap,
> > .name = special_mapping_name,
> > + .split = special_mapping_split,
> > };
> >
> > static const struct vm_operations_struct legacy_special_mapping_vmops = {
>
> Disallowing splitting seems fine. Disallowing munmap might not be.
> Certainly CRIU relies on being able to mremap() the VDSO.
And for mremap() we need do_munmap() to work, argh.
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