H24x7_DATA_BUFFER_SIZE
memset(request_buffer, 0, H24x7_DATA_BUFFER_SIZE);
memset(result_buffer, 0, H24x7_DATA_BUFFER_SIZE);
virt_to_phys(request_buffer), H24x7_DATA_BUFFER_SIZE,
virt_to_phys(result_buffer), H24x7_DATA_BUFFER_SIZE);
static DEFINE_PER_CPU(char, hv_24x7_reqb[H24x7_DATA_BUFFER_SIZE]) __aligned(4096);
static DEFINE_PER_CPU(char, hv_24x7_resb[H24x7_DATA_BUFFER_SIZE]) __aligned(4096);
return (H24x7_DATA_BUFFER_SIZE - sizeof(struct hv_24x7_request_buffer))