> > + > > + /* > > + * Allocate a power of 2 size so alignment to that size is > > + * guaranteed, since the hypercall input and output areas > > + * must not cross a page boundary. > > + */ > > + input = kzalloc(roundup_pow_of_two(sizeof(input->header) + > > + sizeof(input->element[0])), GFP_ATOMIC); > > + output = kmalloc(roundup_pow_of_two(sizeof(*output)), GFP_ATOMIC); > > + > Check for null from these malloc routines? Here and in other places.
Between, is there a plan to setup a percpu input/output page for hypercall input/output on ARM (like we do for x64)? I didn't check the specific size requirement for this particular call, but, that generally will remove the need for these allocations.
